Download or read book Impact of Reduced Soil Insecticide Application Rates on Northern and Western Corn Rootworm Coleoptera written by Mark A. Boetel and published by . This book was released on 1996 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Manure on the Western Corn Rootworm the Soil Arthropod Community and Corn Plant Growth written by Leslie Ladd Allee and published by . This book was released on 1995 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Northern and Western Corn Rootworm Larvae on Field Corn written by and published by . This book was released on 1977 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Western Corn Rootworm written by Stefan Vidal and published by CABI. This book was released on 2005 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book provides a comprehensive review of current knowledge of this insect pest and how it might be managed both in North America and in Europe. Comparisons are drawn between plant protection techniques currently applied in North America and their potential application in Europe. Cultural, biotechnical and biological control measures are also addressed, as are ecological baseline data such as population dynamics of the pest in North America and Europe, economic thresholds and aspects of its behaviour. This book will be of significant interest to those working in the areas of entomology and integrated crop protection throughout the world."--BOOK JACKET.

Download or read book Optimal Management of a Commom Property Pest Under Risk written by W. F. Lazarus and published by . This book was released on 1981 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated pest management model is developed for the northern corn rootworm, Diabrotica longicornis, and the western corn rootworm, Diabrotica virgifera, insect pest of corn. Uncertainty and risk aversion are incorporated into an economic threshold model. Two control actions, soil insecticide and crop rotation, are included. The effect of crop insurance and improved scouting accuracy on insecticide use is evaluated. The rootworms population is considered to be a common property resource with an exhaustible stoock of susceptibility to insecticide. A second objective of the study is to evaluation the potential benefits of a regional approach to corn rootworms control, internalizing the externalities of insecticide resistance and pest movement among farms. A genetic model is used as the basis for predicting the influence of insecticides use rate on resistance buildup. The regional approach is compared with an individual farm approach in an intertemporal aoptimization model solved by nonlinear programming. The empirial results indicate that increased risk aversion reduces the economic threshold for insecticide application, Increased risk aversion also reduces the economic threshold for crop rotation when corn has a large comparative advantage over soybeans. The effects of risk aversion on insecticide use is uncertain. Increased risk aversion may increase "insurance" insecticide application on lightly infested fields, but my also lead to diversification to another crop on heavily (...).

Download or read book The Southern Corn Rootworm written by and published by . This book was released on 1961 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alternatives for Reducing Insecticides on Cotton and Corn written by and published by . This book was released on 1979 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Control of Corn Rootworms Coleoptera chrysomelidae Using Entomopathogenic Nematodes written by Ann Marie Journey and published by . This book was released on 2003 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Western Corn Rootworm coleoptera Chrysomelidae Susceptibility to Foliar Insectivides in Northeast Nebraska written by Timothy B. Dang and published by . This book was released on 2021 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is a major pest of maize in the United States. A variety of tactics are used to manage this pest such as crop rotation, insecticides, and transgenic maize expressing insecticidal proteins from Bacillus thuringiensis (Bt). WCR populations are highly adaptive and have evolved resistance to these management tactics. Management options are limited as few new tactics are available. Research is needed to evaluate the value of existing tactics used within an integrated framework to manage densities/injury and mitigate resistance. This study evaluated the field performance of formulated foliar insecticides (bifenthrin, chlorpyrifos) targeting adult WCR populations in northeast Nebraska during 2019-2020 with the focus on short and longer-term effects on density. Cohorts of fields were treated with a single application of foliar insecticide or left untreated as controls during the peak adult activity period, then sampled for WCR density before and after treatment. WCR densities, sex ratio, and proportion gravid females were not significantly different in treated and untreated fields prior to insecticide application. Results indicated within-season efficacy of insecticides was excellent as mean adult density was significantly reduced post-application in treated fields compared to control fields. An emergence cage study was conducted the following season to document the effect of foliar insecticides on adult survival. Total adult emergence was significantly reduced the following season in treated fields. Results suggest a single, properly timed insecticide application can reduce build-up of WCR density in continuous maize which would also reduce selection pressure on Bt maize where resistance occurs. A positive relationship between the sampling methods, whole plant counts and unbaited Pherocon AM sticky traps, was derived from the sample data. Susceptibility of adult WCR populations in northeast Nebraska was further characterized by conducting laboratory vial bioassays with bifenthrin, chlorpyrifos, and dimethoate to develop dose-response curves. Results confirmed that the WCR populations were relatively susceptible to the active ingredients with exception of a few populations exhibiting low levels of resistance. These data will serve as a baseline for comparison in future bioassays and inform WCR management programs.

Download or read book Western Corn Rootworm Soil Insecticide Treatment Decisions Based on Beetle Numbers written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corn Rootworm Ecology Economics and Behavior written by Leslie Ladd Allee and published by . This book was released on 2001 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economic Impact of Discontinuing Aldrin Use in Corn Production written by Herman W. Delvo and published by . This book was released on 1974 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Optimal Control of Northern Corn Rootworm in Minnesota written by David Winton Briggs and published by . This book was released on 1989 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semiochemicals for Controlling Corn Rootworm written by and published by . This book was released on 1990 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Bibliography of the Northern and Western Corn Rootworm written by Eli Levine and published by . This book was released on 1990 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Five year Comparison of Insecticides Applied to Control Larvae of Western and Northern Corn Rootworms written by Z. B. Mayo and published by . This book was released on 1975 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Degradation Comparisons of Corn Rootworm Insecticides in the Field and Laboratory written by Michael J. Haas and published by . This book was released on 1987 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: