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  Projets de mise en oeuv...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	Détermination des doses minimales biologiquement efficaces d'herbicides pour le désherbage dans la rotation maïs-soya
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	Determining the minimum biologically effective dose of herbicides for weed control in corn-soybean rotations

  Identification of diffe...  

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Bien qu’ils fournissent des données précieuses, les modèles in vitro du développement des adipocytes nécessitent souvent l’emploi de fortes doses d’hormones et de facteurs de croissance, ce qui peut influer sur l’expression des gènes et le processus de différenciation adipocytaire.

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Although they provide valuable information, in vitro models of adipocyte development often require high doses of hormones and growth factors, which may influence gene expression and adipocyte differentiation patterns. To overcome these problems, a novel in vivo model of adipose tissue development was used to characterize genes involved in adipogenesis. The suppression subtractive hybridization technique was used to identify genes showing differential expression between the adipose tissue of a day 90 gestating sow, which is enriched in adipocytes, and day 90 fetal adipose tissue, which is enriched in preadipocytes. A total of 149 expressed sequence tags corresponding to identified genes and tentative consensus sequences emerged. Thirty-seven clones matched expressed sequence tags or genomic DNA sequences and six novel sequences were also identified. Adipogenesis-related genes were identified, many of which have never been reported to be expressed in mammalian adipose tissue, and may play a role in regulation of adipose tissue differentiation. Validation of differentially expressed genes was confirmed for perilipin, monocyte to macrophage differentiation-associated, myocilin, paraoxonase 3, stearoyl-CoA desaturase, angiotensinogen and adiponectin genes using real-time RT-PCR.

  Toxicity of spinosad an...  

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Le principal objectif de cette étude était d’évaluer la sensibilité du vers-gris noir (Agrotis ipsilon) au biopesticide spinosad et à une préparation commerciale (souche GHA) du champignon entomopathogène Beauveria bassiana. Nous avons également quantifié les effets de doses sublétales de spinosad sur certains paramètres de valeur adaptative chez l’A.

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The main objective of this study was to assess the susceptibility of the black cutworm (Agrotis ipsilon) to the biopesticide spinosad and to a commercial formulation (GHA strain) of the entomopathogenic fungus, Beauveria bassiana. Secondly, we quantified the effects of sublethal doses of spinosad on a number of A. ipsilon fitness parameters, and interactions resulting from simultaneous applications of sub-lethal doses of spinosad and B. bassiana. Under laboratory conditions, A. ipsilon third instar larvae were highly susceptible to spinosad, with an estimated LC50 of 50 ppm. The entomopathogenic fungus, B. bassiana had a lower efficacy with an estimated LC50 of 7 107 spores mL-1. Topical applications of 5, 7.5 and 10 ppm of spinosad on third instar larvae reduced larval size and increased time to pupation and to emergence. However, pupal and adult weights were not significantly different between treated and control individuals. Additivity was observed from most spinosad-B. bassiana combinations tested, thus indicating compatibility between products. We concluded that spinosad is a promising tool for controlling black cutworm larvae alone or in combination with other products.

  Acetolactate Synthase (...  

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Dans le cadre d’un criblage réalisé en serre, toutes les descendances F1 étudiées se sont révélées résistantes à deux herbicides à base d’inhibiteurs de l’ALS, soit le thifensulfuron/tribénuron, du groupe des sulfonylurées, et le florasulam, du groupe des triazolopyrimidines; un essai de réaction des pousses à diverses doses a révélé que cette population était 10 fois moins sensible au thifensulfuron/tribénuron et 20 fois moins sensible au florasulam que la population sensible utilisée comme témoin.

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Wild buckwheat is the most abundant broadleaf weed across the Prairie region of western Canada. Acetolactate synthase (ALS)-inhibiting herbicides are commonly used to control this species and other broadleaf weeds in cereal crops. A field survey in Alberta in 2007 identified a single population that was putatively resistant to ALS-inhibiting herbicides. In herbicide resistance screening in the greenhouse, all F1 progeny tested were resistant to the ALS-inhibiting herbicides thifensulfuron/tribenuron, a sulfonylurea herbicide, or florasulam, a triazolopyrimidine herbicide; dose response of shoot biomass indicated the population was 10- and 20-fold less sensitive to thifensulfuron/tribenuron and florasulam, respectively, than a susceptible control population. ALS gene sequencing of 24 F1 progeny indicated that the Trp574Leu target-site mutation was responsible for conferring ALS-inhibitor resistance in this biotype, the first global report of ALSinhibitor resistance for this species. Because this mutation typically endows high-level resistance across all five ALSinhibitor classes, this wild buckwheat biotype may only be controlled by a different site-of-action herbicide.

  Suitable dose of  

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Nous avons irradié des graines de six obtentions de trois espèces de Roegneria avec le rayonnement gamma du 60Co, à différentes doses (50, 100, 150, 200, 250, 300 et 400 Gy). Suite à ces traitements, nous avons étudié l’énergie de germination, la vitesse de germination, la hauteur des semis, la hauteur des plants, le taux de survie des plants et la grenaison.

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Seeds from six accessions of three species of Roegneria were radiated with 60Co γ-ray at different doses (50, 100, 150, 200, 250, 300 and 400 Gy). Following these treatments, germination energy, germination rate, seedling height, plant height, plant survival, and seed set were observed. Plant survival was highly correlated with seedling height (R 2 > 0.91, P < 0.01) and seed set (R 2 > 0.82, P < 0.01). The semi-lethal dose of each accession, calculated using a ‘Multi-target single-hit’ model, ranged from 60 to 173 Gy. The most suitable absorbed doses for each accession were deduced from these data. The suitable doses for Roegneria kamoji, Roegneria ciliaris and Roegneria japonensis were 65–100 Gy, 63–150 Gy and 80–170 Gy, respectively. According to the range of suitable doses, R. kamoji (Pr87-88-353) was the most sensitive to radiation, and R. japonensis (88-89-267) was the most resistant to radiation. Suitable doses of R. ciliaris were close to that of R. kamoji (ZY1007). This research provides preliminary guidelines for radiation induced mutagenesis in Roegneria.

  Toxicity of spinosad an...  

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Le principal objectif de cette étude était d’évaluer la sensibilité du vers-gris noir (Agrotis ipsilon) au biopesticide spinosad et à une préparation commerciale (souche GHA) du champignon entomopathogène Beauveria bassiana. Nous avons également quantifié les effets de doses sublétales de spinosad sur certains paramètres de valeur adaptative chez l’A.

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The main objective of this study was to assess the susceptibility of the black cutworm (Agrotis ipsilon) to the biopesticide spinosad and to a commercial formulation (GHA strain) of the entomopathogenic fungus, Beauveria bassiana. Secondly, we quantified the effects of sublethal doses of spinosad on a number of A. ipsilon fitness parameters, and interactions resulting from simultaneous applications of sub-lethal doses of spinosad and B. bassiana. Under laboratory conditions, A. ipsilon third instar larvae were highly susceptible to spinosad, with an estimated LC50 of 50 ppm. The entomopathogenic fungus, B. bassiana had a lower efficacy with an estimated LC50 of 7 107 spores mL-1. Topical applications of 5, 7.5 and 10 ppm of spinosad on third instar larvae reduced larval size and increased time to pupation and to emergence. However, pupal and adult weights were not significantly different between treated and control individuals. Additivity was observed from most spinosad-B. bassiana combinations tested, thus indicating compatibility between products. We concluded that spinosad is a promising tool for controlling black cutworm larvae alone or in combination with other products.

  Effects of Temperature ...  

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L’utilisation de doses plus élevées a révélé les mêmes tendances, mais la réduction de mortalité observée en présence de température plus élevée était moins prononcée que celle induite par les doses modérées.

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We examined the effects of temperature on mortality of larval stable fly [Stomoxys calcitrans (L.)] caused by Bacillus thuringiensis tolworthi 4L3, B. t. darmastedensis 4M1, B. t. thompsoni 401, B. t. thuringiensis HD2, and B. t. kurstaki HD945. At moderate doses, mortality caused by all isolates ranged from 87 to 99% at 15°C and declined to 29-63% as temperature increased to 30°C. A similar pattern was seen when a higher dose was used, except that the reduction in mortality at warmer temperatures was not as great as was seen with the moderate doses. Insecticidal activity of each isolate against first-instar larvae was reduced by only 5-15% after 5 d in the medium. Mortality of second- and third-instar larvae ranged from 2 to 21%, suggesting the isolates were less effective against larger larvae.

  Chaetoglobosins and aza...  

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Or, à des doses pouvant se rencontrer dans un immeuble endommagé par les moisissures, l’exposition in vivo ou in vitro aux métabolites de certains champignons peut provoquer des changements de nature inflammatoire.

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Chaetomium globosum is one of the most common species of fungi found growing on damp building materials in North America and Europe. At doses that could be experienced in a building with some mould damage, exposure to metabolites from other fungi results in inflammatory changes in vivo and in vitro. This research requires knowledge of the dominant toxins produced by fungal strains from the built environment and characterization of pure compounds for toxicity testing. We examined 25 strains of C. globosum isolated from the built environment in Canada. In varying amounts, these strains primarily produced chaetoglobosin A, C and F, chaetomugilin D, and chaetoviridin A. Spectroscopic data of the major isolated compounds are provided. Previous studies reported a number of metabolites from this species that we did not find. However, this appears to be due to misidentifications of the fungi they examined as well as problems with the analytical methods used. In addition, our data support the use of metabolite profiles for resolving the taxonomy of some economically important Chaetomium species.

  Suitable dose of  

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Nous avons irradié des graines de six obtentions de trois espèces de Roegneria avec le rayonnement gamma du 60Co, à différentes doses (50, 100, 150, 200, 250, 300 et 400 Gy). Suite à ces traitements, nous avons étudié l’énergie de germination, la vitesse de germination, la hauteur des semis, la hauteur des plants, le taux de survie des plants et la grenaison.

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Seeds from six accessions of three species of Roegneria were radiated with 60Co γ-ray at different doses (50, 100, 150, 200, 250, 300 and 400 Gy). Following these treatments, germination energy, germination rate, seedling height, plant height, plant survival, and seed set were observed. Plant survival was highly correlated with seedling height (R 2 > 0.91, P < 0.01) and seed set (R 2 > 0.82, P < 0.01). The semi-lethal dose of each accession, calculated using a ‘Multi-target single-hit’ model, ranged from 60 to 173 Gy. The most suitable absorbed doses for each accession were deduced from these data. The suitable doses for Roegneria kamoji, Roegneria ciliaris and Roegneria japonensis were 65–100 Gy, 63–150 Gy and 80–170 Gy, respectively. According to the range of suitable doses, R. kamoji (Pr87-88-353) was the most sensitive to radiation, and R. japonensis (88-89-267) was the most resistant to radiation. Suitable doses of R. ciliaris were close to that of R. kamoji (ZY1007). This research provides preliminary guidelines for radiation induced mutagenesis in Roegneria.

  Long-Term Cattle Manure...  

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Les épandages de fumier à long terme ont accru les teneurs du sol en matière organique, en azote, en phosphore, en sel et en minéraux traces. Le rendement en paille a augmenté à toutes les doses de fumier, mais les plus fortes doses ont réduit le rendement en grains et nuit à la qualité de la culture.

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A field experiment was started in 1973 to determine the safe loading capacity of soil with cattle feedlot manure. Manure was applied annually at 0, 30, 60, and 90 tonne ha-1 (wet weight) under rainfed and 0, 60, 120, and 180 tonne ha-1 under irrigated conditions. The long-term manure applications resulted in increased levels of organic matter, N, P, salt and trace minerals in soil. This increased straw yield at all manure rates, but reduced grain yields at higher rates and affected crop quality. Increased nutrient levels also increase the potential for nutrient losses and surface and groundwater contamination. The soil enrichments were long-lasting and could pose environmental threats long after application has ceased.

  Suitable dose of  

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Nous avons irradié des graines de six obtentions de trois espèces de Roegneria avec le rayonnement gamma du 60Co, à différentes doses (50, 100, 150, 200, 250, 300 et 400 Gy). Suite à ces traitements, nous avons étudié l’énergie de germination, la vitesse de germination, la hauteur des semis, la hauteur des plants, le taux de survie des plants et la grenaison.

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Seeds from six accessions of three species of Roegneria were radiated with 60Co γ-ray at different doses (50, 100, 150, 200, 250, 300 and 400 Gy). Following these treatments, germination energy, germination rate, seedling height, plant height, plant survival, and seed set were observed. Plant survival was highly correlated with seedling height (R 2 > 0.91, P < 0.01) and seed set (R 2 > 0.82, P < 0.01). The semi-lethal dose of each accession, calculated using a ‘Multi-target single-hit’ model, ranged from 60 to 173 Gy. The most suitable absorbed doses for each accession were deduced from these data. The suitable doses for Roegneria kamoji, Roegneria ciliaris and Roegneria japonensis were 65–100 Gy, 63–150 Gy and 80–170 Gy, respectively. According to the range of suitable doses, R. kamoji (Pr87-88-353) was the most sensitive to radiation, and R. japonensis (88-89-267) was the most resistant to radiation. Suitable doses of R. ciliaris were close to that of R. kamoji (ZY1007). This research provides preliminary guidelines for radiation induced mutagenesis in Roegneria.

  Categorization and nume...  

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Nous analysons l’effet de l’insecticide pyréthroïde bifenthrine incorporé au sol à raison de 100, 200 et 300 g m.a./ha sur les larves du dernier stade du taupin obscur (Agriotes obscurus) (Coleoptera: Elateridae), et nous présentons une méthode permettant d’évaluer l’état de santé et la mobilité des larves en fonction du temps. Les larves de taupin sont devenues moribondes dans l’heure qui a suivi leur transfert dans du sol amendé avec de la bifenthrine à l’une ou l’autre des trois doses susmentionnées.

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We discuss the effect of the pyrethroid insecticide bifenthrin incorporated into soil at 100, 200, and 300 g AI/ha on late-instar larvae of the dusky wireworm, Agriotes obscurus (Coleoptera: Elateridae), and present a method of assessing wireworm health and mobility over time. Wireworms became moribund within 1 h of placement in soil amended with bifenthrin at all rates. After 2 weeks of morbidity in amended soils, wireworms recovered within 7 days of being placed in clean soil. A considerable proportion (0.13–0.93) of wireworms placed in amended soil moved to the soil surface and remained there for 2 weeks or more in a moribund state; wireworms transferred to clean soil no longer moved to the soil surface. Eight distinct mobility categories were observed and are described, and a new method for assessing wireworm health and mobility over time is discussed.

  Réaction aux engrais N ...  

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Les relations indiquent que le canola hybride a un rendement grainier supérieur à celui du canola à pollinisation libre, indifféremment de l’apport d’engrais azoté, et que les doses optimales d’engrais azoté sont d’environ 50 % plus élevées pour le canola hybride que pour le canola à pollinisation libre.

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Canola is a viable crop when grown under fallow in the semiarid prairie, but is also grown in longer rotations, most often no-till seeded into standing stubble. Selecting the proper N fertilizer rate is a very challenging production decision, but most of the available nitrogen response for canola has been derived for the more subhumid parts of the Canadian prairies. We developed simple quadratic equations to describe the yield relationship for stubble-seeded open-pollinated and hybrid canola in the semiarid Canadian prairie. These relationships indicate that hybrid canola produced higher grain yields at all fertilizer rates and had optimum N fertilizer rates about 50% higher than those for open-pollinated canola.

  Suitable dose of  

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Nous avons irradié des graines de six obtentions de trois espèces de Roegneria avec le rayonnement gamma du 60Co, à différentes doses (50, 100, 150, 200, 250, 300 et 400 Gy). Suite à ces traitements, nous avons étudié l’énergie de germination, la vitesse de germination, la hauteur des semis, la hauteur des plants, le taux de survie des plants et la grenaison.

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Seeds from six accessions of three species of Roegneria were radiated with 60Co γ-ray at different doses (50, 100, 150, 200, 250, 300 and 400 Gy). Following these treatments, germination energy, germination rate, seedling height, plant height, plant survival, and seed set were observed. Plant survival was highly correlated with seedling height (R 2 > 0.91, P < 0.01) and seed set (R 2 > 0.82, P < 0.01). The semi-lethal dose of each accession, calculated using a ‘Multi-target single-hit’ model, ranged from 60 to 173 Gy. The most suitable absorbed doses for each accession were deduced from these data. The suitable doses for Roegneria kamoji, Roegneria ciliaris and Roegneria japonensis were 65–100 Gy, 63–150 Gy and 80–170 Gy, respectively. According to the range of suitable doses, R. kamoji (Pr87-88-353) was the most sensitive to radiation, and R. japonensis (88-89-267) was the most resistant to radiation. Suitable doses of R. ciliaris were close to that of R. kamoji (ZY1007). This research provides preliminary guidelines for radiation induced mutagenesis in Roegneria.

  Suitable dose of  

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Nous avons irradié des graines de six obtentions de trois espèces de Roegneria avec le rayonnement gamma du 60Co, à différentes doses (50, 100, 150, 200, 250, 300 et 400 Gy). Suite à ces traitements, nous avons étudié l’énergie de germination, la vitesse de germination, la hauteur des semis, la hauteur des plants, le taux de survie des plants et la grenaison.

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Seeds from six accessions of three species of Roegneria were radiated with 60Co γ-ray at different doses (50, 100, 150, 200, 250, 300 and 400 Gy). Following these treatments, germination energy, germination rate, seedling height, plant height, plant survival, and seed set were observed. Plant survival was highly correlated with seedling height (R 2 > 0.91, P < 0.01) and seed set (R 2 > 0.82, P < 0.01). The semi-lethal dose of each accession, calculated using a ‘Multi-target single-hit’ model, ranged from 60 to 173 Gy. The most suitable absorbed doses for each accession were deduced from these data. The suitable doses for Roegneria kamoji, Roegneria ciliaris and Roegneria japonensis were 65–100 Gy, 63–150 Gy and 80–170 Gy, respectively. According to the range of suitable doses, R. kamoji (Pr87-88-353) was the most sensitive to radiation, and R. japonensis (88-89-267) was the most resistant to radiation. Suitable doses of R. ciliaris were close to that of R. kamoji (ZY1007). This research provides preliminary guidelines for radiation induced mutagenesis in Roegneria.

  Long-Term Cattle Manure...  

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Les épandages de fumier à long terme ont accru les teneurs du sol en matière organique, en azote, en phosphore, en sel et en minéraux traces. Le rendement en paille a augmenté à toutes les doses de fumier, mais les plus fortes doses ont réduit le rendement en grains et nuit à la qualité de la culture.

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A field experiment was started in 1973 to determine the safe loading capacity of soil with cattle feedlot manure. Manure was applied annually at 0, 30, 60, and 90 tonne ha-1 (wet weight) under rainfed and 0, 60, 120, and 180 tonne ha-1 under irrigated conditions. The long-term manure applications resulted in increased levels of organic matter, N, P, salt and trace minerals in soil. This increased straw yield at all manure rates, but reduced grain yields at higher rates and affected crop quality. Increased nutrient levels also increase the potential for nutrient losses and surface and groundwater contamination. The soil enrichments were long-lasting and could pose environmental threats long after application has ceased.

  La dexaméthasone atténu...  

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On a administré deux doses (essai n° 1 = 0,088 mg par kg; essai n° 2 = 10 mg par veau) de dexaméthasone par voie intramusculaire à des veaux de boucherie (essai n° 1, n = 60; essai n° #2, n = 58) avant qu’ils soient transportés par route pendant 10 ou 8 heures, afin de vérifier l’effet du composé sur la perte de poids induite par le transport.

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Dexamethasone was administered intramuscularly at two dose levels (Trial 1= 0.088 mg kg-1; Trial 2=10 mg per calf) to beef calves(Trial 1, n=60; Trial 2, n=58) prior to transport by road for 10 and 8 h, to test the effect on transport-induced weight losses. Calves lost significant weight over the transport periods (P < 0.001) but dexamethasone-treated calves lost significantly less weight than control animals (P < 0.004). The relationship between salivary dexamethasone concentrations and weight losses in Trial 1 exhibited a significant trend (r=0.47, P < 0.06). The correlation of administered dose of dexamethasone (mg kg-1) with weight losses in Trial 2 was significant (r=0.5, P < 0.006). Dexamethasone administration prior to long-haul transport reduced transport-induced weight losses, and may be an effective method of mitigating transport stress.

  Effet d’un traitement à...  

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Les concentrations de prolactine, progestérone, estradiol-17b et leptine ont été dosé es. La silymarine n’a pas augmenté les concentrations de prolactine à aucune des doses utilisées et n’a pas affecté non plus les concentrations des autres hormones mesurées (P>0.1).

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An extract (silymarin) from the plant Silybum marianum (milk thistle) was shown to increase circulating concentrations of prolactin in cycling rats. A dose-response study was undertaken to determine if silymarin does have hyperprolactinemic properties in cycling swine. Forty-four weaned sows were allotted to four groups receiving 0, 1, 2 or 4 g d-1 of silymarin over a period of 8 d. Blood samples were obtained on days 1 (first day of treatment starting 24 to 48 h after the onset of the standing estrus), 2, 3, and 9. Prolactin, progesterone, estradiol-17β and leptin concentrations were determined. Silymarin did not increase prolactin concentrations at any of the doses studied, nor did it affect concentrations of the other hormones (P>0.1).

  Évaluation de l'efficac...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	Les sept herbicides évalués ont été utilisés à 3 doses différentes, soient 0.5X, 1X et 2X. L'efficacité des herbicides fut évaluée en recueillant des données sur les dommages causés aux plants de ginseng (été 2006) et sur le rendement de leurs racines (au printemps 2007).
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	The seven herbicides evaluated were applied at three rates: 0.5X, 1X and 2X. Herbicide efficacy was evaluated by collecting data on injury caused to the ginseng plants (summer 2006) and on root yield (spring of 2007).

  Essai de contrôle des h...  

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Le plan expérimental utilisé fut un bloc aléatoire complet, comportant 4 répétitions et utilisant des parcelles de 2.25m × 8m. Les sept herbicides évalués ont été utilisés à 3 doses différentes, soient 0.5×, 1× et 2×.

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Field trials were conducted in 2007 at the Simcoe Research Station of the University of Guelph, in Ontario. The experimental design was a randomized complete block design with four replications. Plots were 2.25 m by 8 m. The seven herbicides evaluated were applied at three rates: 0.5×, 1× and 2×. The herbicide treatments were either pre-emergence or post-emergence to the weeds. Data were collected on injury to peas and efficacy in controlling broadleaf weeds.

  Mise au point et impact...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	Les études de terrain ont été menées de 2004 à 2007 sur deux champs en rotation maïs-soja à Beaumont et à St-Jean-sur-Richelieu au Québec. Des sections de champs ont été traitées en post-levée soit avec des doses d'herbicide variables, soit avec une pleine dose constante.
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	Field studies were conducted from 2004 to 2007 on two corn and soybean crop rotations in Beaumont and St-Jean-sur-Richelieu, Quebec. Sections of fields were treated with varying in-crop herbicides, with a full constant dose. Variable doses (no herbicide, half or full doses) were based on the calculated RC value.

  Zebarth, Bernie, Ph.D. ...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	« Effet de différentes sources et doses de fertilisants minéraux azotés sur le lessivage potentiel des nitrates sous culture de pomme de terre. », 24e Congrès annuel de l’Association Québécoise des Spécialistes en Science du Sol (AQSSS): Vers des systèmes sol-plante sains et durables, Abbaye d’Oka, Oka, QC, Canada, June 1-3, 2010.
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	Cambouris, A.N. and Zebarth, B.J. (2010). "Effet de différentes sources et doses de fertilisants minéraux azotés sur le lessivage potentiel des nitrates sous culture de pomme de terre.", 24e Congrès annuel de l’Association Québécoise des Spécialistes en Science du Sol (AQSSS): Vers des systèmes sol-plante sains et durables, Abbaye d’Oka, Oka, QC, Canada, June 1-3, 2010.

  Mise au point et impact...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	Les études de terrain ont été menées de 2004 à 2007 sur deux champs en rotation maïs-soja à Beaumont et à St-Jean-sur-Richelieu au Québec. Des sections de champs ont été traitées en post-levée soit avec des doses d'herbicide variables, soit avec une pleine dose constante.
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	Field studies were conducted from 2004 to 2007 on two corn and soybean crop rotations in Beaumont and St-Jean-sur-Richelieu, Quebec. Sections of fields were treated with varying in-crop herbicides, with a full constant dose. Variable doses (no herbicide, half or full doses) were based on the calculated RC value.

  Weed control, environme...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	Soltani, N., Nurse, R.E., Van Eerd, L.L., Vyn, R.J., Shropshire, C., et Sikkema, P.H. (2010). « Weed control, environmental impact and profitability with trifluralin plus reduced doses of imazethapyr in dry bean. », Crop Protection, 29(4), p.
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	Soltani, N., Nurse, R.E., Van Eerd, L.L., Vyn, R.J., Shropshire, C., and Sikkema, P.H. (2010). "Weed control, environmental impact and profitability with trifluralin plus reduced doses of imazethapyr in dry bean.", Crop Protection, 29(4), pp. 364-368. doi : 10.1016/j.cropro.2009.07.011 Access to full text

  Légère, Anne, Ph.D. - A...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	« Doses réduites d’herbicides et dynamique des populations de mauvaises herbes. », Cahier de conférence - Événement conjoint en phytoprotection, CRAAQ/SPPQ, Drummondville, QC, Canada, October 22-23, 2009.
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	Simard, M.-J., Panneton, B., Rouane, S., Leroux, G.D., Longchamps, L., and Légère, A. (2009). "Doses réduites d’herbicides et dynamique des populations de mauvaises herbes.", Cahier de conférence - Événement conjoint en phytoprotection, CRAAQ/SPPQ, Drummondville, QC, Canada, October 22-23, 2009.

  Mise au point et impact...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	Effectuer une analyse spatiale des mauvaises herbes présentes dans les champs de maïs et des champs de soja traités avec différents herbicides et diverses doses; valider les stratégies de gestion des mauvaises herbes au moyen de traitements herbicides localisés et de doses réduite
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	To conduct a spatial analysis of weed coverage in corn and soybean fields treated with various herbicides and rates and validate weed management strategies using localized and reduced rate herbicide applications

  Mise au point et impact...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	Effectuer une analyse spatiale des mauvaises herbes présentes dans les champs de maïs et des champs de soja traités avec différents herbicides et diverses doses; valider les stratégies de gestion des mauvaises herbes au moyen de traitements herbicides localisés et de doses réduite
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	To conduct a spatial analysis of weed coverage in corn and soybean fields treated with various herbicides and rates and validate weed management strategies using localized and reduced rate herbicide applications

  Toxicity of spinosad an...  

Montrer texteMontrer source en cacheMontrer URL avec texte source	, Bélair, G., Simard, L., et Brodeur, J. (2009). « Toxicity of spinosad and Beauveria bassiana to the black cutworm, and the additivity of subletal doses. », Biocontrol Science and Technology, 19(2), p.
Comparer pages textesComparer pages HTMMontrer URL avec texte sourceMontrer URL avec langue cibleDéfinir listeriosis-listeriose.investigation-enquete.gc.ca comme domaine prioritaire	Gosselin, M.-E., Bélair, G., Simard, L., and Brodeur, J. (2009). "Toxicity of spinosad and Beauveria bassiana to the black cutworm, and the additivity of subletal doses.", Biocontrol Science and Technology, 19(2), pp. 201-217. doi : 10.1080/09583150802663285 Access to full text

  Seed yield and yield co...  

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Les essais, réalisés en blocs complets randomisés, comportaient vingt traitements portant sur deux génotypes oléagineux de colza (B. napus de type canola) et de moutarde (B. juncea de type canola), trois doses d’application d’engrais soufré (15, 30 et 45 kg S ha-1) et potassique (30, 60 et 90 kg K ha-1) étant prévues pour chacun.

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Improper sulfur (S) and potassium (K) fertilizer management, particularly with continued soil nutrient mining, is one of the major factors contributing to low seed yield of canola in northwestern Pakistan. A field experiment was conducted in 2007-2008 on a S and K deficient clay loam soil at the Research Farm of NWFP (Northwest Frontier Province) Agricultural University, Peshawar, Pakistan, with an objective to determine seed yield and yield components response of Brassica oilseed rape versus mustard to S and K application. Twenty treatments in a randomized complete block design were consisted of two oilseed rape (B. napus canola) and mustard (B. juncea canola) genotypes at three rates each of S (15, 30, and 45 kg S ha-1) and K (30, 60, and 90 kg K ha-1) fertilizers plus one control (no S and K applied). Seed yield and yield components increased significantly with K and S fertilization as compared to the zero-S/zero-K control. Both genotypes responded positively for seed yield and yield components to K and S fertilization, but the magnitude of response varied with levels of S and K, as well as combined K + S applications. It is concluded that a combination of 60 kg K + 30 kg S ha-1 would improve seed yield and yield components of rape and mustard in the study area and contribute significantly to increased production. Growing B. napus was better than B. juncea in the study area, because B. napus produced significantly higher seed yield and yield components than B. juncea, indicating that yield components are the most important criteria for selection of Brassica genotypes for higher seed yield.

  A GIS-based fertilizer ...  

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Notre étude visait à mettre au point un logiciel s’appuyant sur un SIG et permettant aux producteurs agricoles de choisir les doses d’application d’engrais et de gérer les éléments nutritifs dans leurs sols.

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Application of computer technology such as Geographical Information Systems (GIS) to help farmers optimize fertilization, improve soil fertility and protect soil from erosion is currently of considerable interest as a topic of research. The objective of this study was to develop a GIS-based software package that can be used to help farmers select fertilizer application rates and manage soil nutrients. The ease of integration and programming in current digital spatial technology made it feasible to combine a fertilization model with a GIS platform to develop a GIS-based Fertilizer Decision Support System (FDSS) that enables farmers to determine precise fertilizer recommendations through an interactive computer interface. This paper outlines the development and test application of a GIS-based FDSS at Tong-le Village of Baiquan County, Heilongjiang province of Northeast China. The FDSS uses a farm field as the base mapping unit and incorporates data from field samples, farmer surveys and remote sensing, as well as expert knowledge in agriculture, soil science and computer science to develop a spatial database and soil/crop management system. The FDSS is a crop fertilization and management software developed on the SuperMap platform, and will help farmers and managers of agricultural production units to increase their fertilizer utilization efficiency, and thus their net profit.