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Evaluation Of Bollworm Behavior, Damage, And Control In Cotton With Insecticidal Proteins And Formulated Insecticides, Russell Ethan Godbold
Evaluation Of Bollworm Behavior, Damage, And Control In Cotton With Insecticidal Proteins And Formulated Insecticides, Russell Ethan Godbold
Theses and Dissertations
The bollworm, Helicoverpa zea (Boddie), is an economically important pest of cotton and is becoming more difficult to control in the United States. This project was designed to develop a better understanding of the effects of resistance development and plant structures on the efficacy of Bt cotton and foliar insecticides. Experiments examined larval behavior and damage in current cotton varieties expressing proteins from Bacillus thuringiensis. Other experiments examined the effects of floral structures on the control of bollworm using foliar insecticides. Results suggest that larval feeding and avoidance behavior is dependent on point of eclosion. Fruiting form damage increased in …
Evaluation Of Pesticide Application Technology In Cotton Production, Chase Samples
Evaluation Of Pesticide Application Technology In Cotton Production, Chase Samples
Theses and Dissertations
There have been many changes in production agriculture over the last 20 years. The use of herbicide resistant crops has become common place in production agriculture. However, the release of crops resistant to auxin herbicides has brought more attention to the pesticide application process regardless of the type of pesticide applied. Moreover, controlling off-target movement of pesticides has become an integral part of the day to day farming tasks. The use of deposition aids when applied with water has been documented; however, the effect of deposition aids on pesticide application is not well understood. Based on these findings, selecting a …
Agronomic And Physiological Responses Of Resistant And Susceptible Cotton Genotypes To Reniform Nematode Severity And Soil Nitrogen, Bhupinder Singh
Agronomic And Physiological Responses Of Resistant And Susceptible Cotton Genotypes To Reniform Nematode Severity And Soil Nitrogen, Bhupinder Singh
Theses and Dissertations
Rotylenchulus reniformis (RN) nematode infection has been identified as a major biotic factor limiting cotton yield (~8%) in Mississippi. Cotton researchers are striving to develop resistance to RN and develop management practices to mitigate the problem. Reniform nematode and soil nitrogen (N) directly affect cotton growth and physiology, however, responses to RN and N may vary across a wide genetic background. The overall objective of this research was to determine the role that host plant resistance to reniform nematode and soil nitrogen plays in cotton growth, physiology, and yield and controlling RN populations. In experiment 1, the effect of RN …