Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"soil-applied"”.
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The development of azadirachtin as a soil-applied, granular insecticide
… develop azadirachtin as an insecticide that is applied to the soil, using a granular formulation, for root uptake and subsequent systemic plant protection. A method was developed whereby azadirachtin could be rapidly isolated to approximately 95% purity using flash chromatography. This material …
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Studies of the toxicity and phytotoxicity of two soil applied granulated systemic insecticides
… insecticides following application to the soil. Because Isolan and phorate are comparatively new insecticides in New Zealand, an endeavour was made to establish the relative aphicidal properties of these chemicals in the vapour phase and as contact insecticides, in order to envisage their …
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Dissipation and potential crop injury for soil applied clomazone, chlorimuron, imazaquin, and imazethapyr
… dissipation of imazaquin and imazethapyr on two soil types.
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Zinc fertilization of lentil in Saskatchewan to increase yield and grain zinc content
… of three rates (0, 2.5 and 5 kg Zn ha-1) of soil applied ZnSO4 were examined at a site in the Brown soil zone identified as Zn deficient and a site in the Dark Brown soil zone that was identified as sufficient in soil Zn. In 2014, hard red spring wheat was seeded to assess the residual …
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Evaluation of Nitrogen Management Schemes upon Vine Performance in Cover Cropped Vineyards
… yeast assimilable nitrogen (YAN) in the juice. Soil applications of calcium nitrate and foliar applications of urea were assessed as a means of vineyard N amelioration at cover cropped sites comprised of Petit Manseng and Sauvignon blanc (Vitis vinifera L.). Perennial White and Crimson clover …
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Evaluation of Safening Effects to Herbicides Conferred via Insecticide Seed Treatments in Soybean (Glycine max) and Grain Sorghum (Sorghum bicolor)
… cotton injury following applications of the soil-applied herbicide clomazone. Additionally, recent research has shown that, when applied as seed treatments prior to planting, some neonicotinoid insecticides can safen rice to drift from both glyphosate and imazethapyr. Since insecticide seed …
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Evaluation of Nitrogen Management Schemes in Cover Cropped Vineyards
… yeast assimilable nitrogen (YAN) in the juice. Soil applications of calcium nitrate and foliar applications of urea were assessed as a means of vineyard N amelioration at cover cropped sites comprised of Petit Manseng and Sauvignon blanc (Vitis vinifera L.). Perennial White and Crimson clover …
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Near-infrared reflectance soil organic matter sensor
In-field sensing of soil organic matter content would be desirable to provide a control input for the variation of soil-applied herbicide application rates. Control based on organic matter content could eliminate overapplication on less productive areas within a field, thereby improving …
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Simulation of pesticide availability and transfer into overland flow
… which affect the availability and transfer of soil applied pesticides to runoff water on the soil surface were investigated. This research was composed of three major components: field investigation of pesticide transport as a function of pesticide formulation and application technique, …
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Resistance management of western corn rootworm (Coleoptera: Chrysomelidae) in transgenic Bt maize
… field study was used to evaluate the use of a soil-applied insecticide with Bt maize to reduce feeding injury by western corn rootworm and delay resistance to Bt maize. Lastly, a computer model was used to examine the impact on expected time to resistance for maize producing two Bt traits when …
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RESPONSE OF CANOLA, WHEAT AND PEA TO FOLIAR PHOSPHORUS FERTILIZATION IN THREE SASKATCHEWAN SOIL ZONES
… amounts of phosphorus (P) are removed from soil in harvested plant material. As a result greater amounts of phosphorus fertilizers are required to maintain both crop yields and long-term soil fertility. However P fertilizer application practices must consider factors including high …
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Race studies and effects of soybean root leachate and herbicides on hatching and emergence of Heterodera glycines
… field conditions, (2) to determine effect of six soil-applied herbicides on hatch and emergence, (3) to clarify the distribution of H. glycines races in Illinois. Cysts of H. glycines were exposed to root leachate of H. glycines-resistant Fayette soybean and H. glycines-susceptible cultivars …
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Fate of the herbicide clomazone in soil
… about the environmental properties of the soil-applied herbicide clomazone. The effects of soil microbial activity, temperature, and moisture on clomazone fate were determined following ($\sp{14}$C) clomazone application to the surface of a Flanagan silty clay loam. Degradation of clomazone …
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Characterization of HPPD-inhibitor resistance in waterhemp (Amaranthus tuberculatus)
… to be 10-to 35-fold. The efficacy of foliar-applied HPPD inhibitors at the McLean Co. location is addressed in Chapter 3. Similar to findings of the previous greenhouse experiments, HPPD inhibitors did not provide adequate control of this population, and mortality data indicate a high …
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Dissecting phenotypic inheritance of very-long-chain fatty acid inhibitor resistance in waterhemp (Amaranthus tuberculatus) using a novel greenhouse assay: 'PRIM'
… feed the world's growing population. Herbicides applied preemergence (PRE) are on the frontlines in the arms race of herbicide formulation development and rotating sites-of-action (SoA) to ameliorate herbicide resistance in weedy plants. A pseudo-POST germination method is needed to accurately …
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Even-aged regeneration alternatives for low quality oak hardwood forests in the Virginia Piedmont
… a triclopyr basal bark spray or hexazinone soil applied spot treatment for releasing loblolly pine at age one. Both release treatments significantly reduced natural regeneration basal area and density when used two years after the herbicide stump treatment. Loblolly pine growth was …
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Response of cool-season turfgrass to foliar applied and stabilized nitrogen fertilizers
… conducted to determine the quantity of foliar-applied N that is absorbed by turfgrass leaves, ways to optimize the process, and whether other common management practices can affect foliar N uptake under field conditions. Studies were also carried out to determine if foliar-applied N results in …
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Effect of Soil Type, Composting, and Antibiotic Use on Fate of Antibiotic Resistance Genes and Microbial Community Composition in Dairy and Beef Manure Applied Soils
Manure is a commonly used soil fertilizer, but there are concerns that this practice could affect the spread of antibiotic resistance genes (ARGs) from farm to fork. A microcosm-scale study evaluated the effect of prior antibiotic use (manure-based soil amendments generated from dairy and beef …
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The recovery and behavior of fertilizer nutrients from the anaerobic digestion of poultry manure
… slurries. The mineralization of organic N fran soil applied effluent was 2.3 times greater in comparison to influent over a 33.5 week laboratory incubation period. Higher mineralization is due to segregation of decay resistant solids into the settled sludge and the decrease in surface area of …
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Inheritance and fitness costs Of field-derived resistance To Cry3Bb1 corn by western corn rootworm
… larvae were reared on whole corn plants in field soil, no fitness costs of resistance were detected for Monona. In a laboratory experiment with Elma, in which larvae experienced intraspecific and interspecific competition for food, a fitness cost of delayed larval development was identified, …
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