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Developing A Monitoring Plan For Corn Earworm Helicoverpa Zea Lepidoptera Noctuidae In Sweet Corn
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Book Synopsis Developing a Monitoring Plan for Corn Earworm, Helicoverpa Zea (Lepidoptera: Noctuidae), in Sweet Corn by : Emma Dian Connery
Download or read book Developing a Monitoring Plan for Corn Earworm, Helicoverpa Zea (Lepidoptera: Noctuidae), in Sweet Corn written by Emma Dian Connery and published by . This book was released on 2003 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Perspectives on the Management of Helicoverpa Zea (Boddie) (Lepidoptera: Noctuidae) in United States Sweet Corn by : Daniel Lucas Olmstead
Download or read book New Perspectives on the Management of Helicoverpa Zea (Boddie) (Lepidoptera: Noctuidae) in United States Sweet Corn written by Daniel Lucas Olmstead and published by . This book was released on 2015 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicoverpa zea (Boddie), the corn earworm, is a polyphagous caterpillar pest found throughout the United States and is a key pest of sweet corn. Chapter one is a review of literature relevant to the biology, ecology and management of H. zea in United States sweet corn production. Chapter two evaluates the predictive ability of male moth pheromone trap catch alone compared to a model that incorporates multiple factors on the biology and development of H. zea and the environment. Chapter three tests the efficacy of insecticides, registered for use against H. zea in sweet corn, in context to important timing windows during sweet corn ear development, as outlined in chapter two. The epilogue summarizes conclusions and identifies areas of future research. Chapter one is a comprehensive review of the literature relating to the biology, ecology and management of H. zea in United States sweet corn production. First, H. zea behavior, development, host interactions and ecology are reviewed, including host range, dispersal and migration, diapause and overwintering. Next, integrated pest management (IPM) practices for control of H. zea are discussed. Then, current tools including cultural, biological, chemical and transgenic controls for H. zea are reviewed. Finally, research needs likely to be of importance for management of H. zea in coming years are outlined. Female H. zea oviposit on sweet corn silks and yield loss occurs when neonates migrate into the ear under the husk to feed because a single larva can cause complete economic loss if the ear is for fresh market purposes. Chapter two examines current integrated pest management (IPM) guidelines for sweet corn that use pheromone trap-captured male H. zea moths to inform management decisions compared to models inclusive of additional factors relevant to ovipositional behavior or development of H. zea. Results of logistic regression and predictive discriminant analyses demonstrate that using multiple environmental and biological factors do, in fact, provide a higher predictive power than pheromone trap catch alone. These results show that IPM strategies to control H. zea damage in sweet corn should use multiple biological and environmental factors important for oviposition and infestation, and that pheromone trap catch alone is not the best predictor of damage at harvest. Chapter three draws on the conclusions of chapter 2, asking whether sweet corn can be protected more effectively if insecticides are applied to target the most attractive silking periods for female H. zea oviposition. The relationship between insecticide application timing from tassel through silk stages and marketable yield at harvest were evaluated in the field. Results were compared to yields resulting from current IPM recommendations for the northeast United States. The effectiveness of three registered insecticides (methomyl, chlorantraniliprole and lambda-cyhalothrin), each representing a different class of insecticide, were evaluated. Significant yield differences among insecticides and timing treatments were detected and the combined effects of active ingredient with timing determined the extent of H. zea damage. The efficacy of chlorantraniliprole as an effective means of H. zea control in sweet corn was unclear. In year 1, there was no significant effect of insecticide type or application timing, but there was a significant interaction effect between factors. In year 2, there was a significant effect of insecticide type. Chlorantraniliprole treatments resulted in significantly higher percentages of sweet corn ears compared to lambda-cyhalothrin. There was also a main effect of application timing. Four insecticide applications made from 50% tassel to 25% dry silk resulted in significantly higher percentages of clean ears at harvest compared with a single insecticide application made at 50% tassel. Compared to other timing treatments, however, there were no significant differences. 4 The epilogue provides a summary of conclusions reached from chapters one through three. This section also discusses areas of future research that include plant-insect dynamics, chemical ecology and possibilities for advancement of IPM strategies for H. zea management in the 21st century. 5.
Book Synopsis Management of the Corn Earworm, Heliothis Zea (Boddie) (Lepidoptera: Noctuidae), in Sweet Corn in Hawaii by : Roger I. Vargas
Download or read book Management of the Corn Earworm, Heliothis Zea (Boddie) (Lepidoptera: Noctuidae), in Sweet Corn in Hawaii written by Roger I. Vargas and published by . This book was released on 1979 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seasonal Consequences for Temperature-size Relationships in the Corn Earworm, Helicoverpa Zea (Lepidoptera: Noctuidae) by : Sharon Fern Clemmensen
Download or read book Seasonal Consequences for Temperature-size Relationships in the Corn Earworm, Helicoverpa Zea (Lepidoptera: Noctuidae) written by Sharon Fern Clemmensen and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The majority of ectotherms exhibit a pattern of decreasing size with increasing temperature, known as the temperature-size rule (TSR). Despite the extent of this pattern, the effect of seasonality on the TSR is poorly understood. We use Helicoverpa zea (corn earworm) to determine the effects of seasonal dormancy programming (pupal diapause) on the TSR, lipid storage, and larval development. H. zea did not conform to the TSR over the seasonally-relevant temperature range where pupae entered diapause. H. zea increased in both lipid and lean mass with increasing temperature for 16°C to 20°C in both diapause-destined and non-diapause treatments. Diapausing H. zea were fatter across temperatures without having more lean mass, and the slope of the relationship between lean mass and temperature was not different between diapausing and non-diapausing pupae. Across temperatures, diapause-destined larvae increased their consumption but not their digestive efficiency, supporting increased pupal lipid mass. We found threshold weights for entrance to and exit from diapause, and diapause-destined larvae altered the timing for pupation, further reinforcing the importance of size to seasonal diapause. In conclusion, predictions of seasonal effects on body size must incorporate cues other than temperature, to avoid inaccurate or incomplete models of development and body size.
Download or read book Corn Earworm written by and published by . This book was released on 1999 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The corn earworm, Helicoverpa zea, is a major pest of late season sweet corn in Ontario. It is the larva of a moth that does not overwinter in the province and which migrates into Ontario normally by August. This bulletin provides information on the corn earworm's migration patterns, life history (moth to egg to larva), types of damage caused & symptoms of damage, earworm monitoring methods, and chemical & non-chemical control methods.
Book Synopsis Response of Instars of the Corn Earworm, Heliothis Zea (lepidoptera: Noctuidae) to Two Susceptible Sweet Corn Hybrids by : Billy Ray Wiseman
Download or read book Response of Instars of the Corn Earworm, Heliothis Zea (lepidoptera: Noctuidae) to Two Susceptible Sweet Corn Hybrids written by Billy Ray Wiseman and published by . This book was released on 1973 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corn Earworm Pest of Sweet Corn by : Timothy D. Waters
Download or read book Corn Earworm Pest of Sweet Corn written by Timothy D. Waters and published by . This book was released on 2016 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The corn earworm (Helicoverpa zea) is the most destructive insect pest of sweet corn in the US and has been noted to be one of the most destructive plant feeding insects in the world. Preferred crops for earworm include corn, tomato, sorghum, vetch, and cotton. On these crops, the pests are called corn earworm, tomato fruitworms, sorghum headworm, vetchworm, and the American cotton bollworm, respectively. Corn earworm will also feed on numerous other crops, including alfalfa, oat, soybean, sunflower, asparagus, cabbage, cantaloupe, cucumber, eggplant, bean, pea, pepper, potato, pumpkin, and watermelon as well as some weed hosts. Corn earworm occurs throughout the Americas, being a native insect pest occurring from Argentina in the south to Canada in the north. The goal of this publication is to discuss the biology of corn earworm and to aid commercial producers and crop consultants by providing scouting techniques and control options for this pest in sweet corn."--Abstract.
Book Synopsis Investigating Host Use and Migration by the Corn Earworm (Noctuidae: Helicoverpa Zea) Using Stable Isotope and Morphometric Techniques by :
Download or read book Investigating Host Use and Migration by the Corn Earworm (Noctuidae: Helicoverpa Zea) Using Stable Isotope and Morphometric Techniques written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The commercialization of cotton and corn, genetically engineered to produce a caterpillar-specific insecticidal protein (Bt toxin) has focused renewed attention on the issue of southward migration of Helicoverpa zea because it could have a major effect on the rate at which this pest evolves resistance to the Bt toxin. Corn is a major host of H. zea and since there is presently limited use of transgenic Bt corn in the Northern corn-belt southern migration from this corn could result in a larger overall refuge for susceptible H. zea and that would decrease the rate of resistance evolution We applied a stable carbon isotope technique to test the hypothesis that H. zea migrates North in early summer, feeds on corn, then migrates back South to feed on cotton. We analyzed the relative abundance of the naturally occurring isotope, 13C, incorporated in wing cuticle of a moth as an indicator of the photosynthetic pathway (corn=C4, cotton=C3) of the plant that had been fed upon by it when it was a larva. Our carbon isotope analyses of H. zea, captured in pheromone traps, in the Brazos River Valley, Texas, demonstrated that at any given date from late summer to early fall in 2000, 40-100 percent of the moths developed on C4 host plants and were present as adults in a cotton growing area where there were no known C4 hosts suitable for development. Our investigation has also shown significant morphometric differences in moths from C3 and C4 hosts. Moths that fed upon a C4 host during the larval stage typically had larger wing length and were heavier than moths that fed upon a C3 host. Host plant quality during larval development may affect fluctuating asymmetry in adult characteristics, such as wing length, causing greater asymmetry in moths whose larvae fed on sub-optimal hosts. Apparently, there was no effect of host plant type on the degree of wing length asymmetry measured in the Texas moth samples, however, there was a significant effect of DATE, and an interaction effect o.
Book Synopsis Corn Earworm, Helicoverpa Zea (Boddie) (Lepidoptera: Noctuidae) by :
Download or read book Corn Earworm, Helicoverpa Zea (Boddie) (Lepidoptera: Noctuidae) written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigating Host Use and Migration by the Corn Earworm (Noctuidae: Helicoverpa Zea) Using Stable Isotope and Morphometric Techniques by : Tracy Lee Rennie
Download or read book Investigating Host Use and Migration by the Corn Earworm (Noctuidae: Helicoverpa Zea) Using Stable Isotope and Morphometric Techniques written by Tracy Lee Rennie and published by . This book was released on 2003 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: corn earworm, stable isotopes, Bt crops, insect resistance management, fluctuating asymmetry.
Book Synopsis Insect Resistance Management by : David W. Onstad
Download or read book Insect Resistance Management written by David W. Onstad and published by Academic Press. This book was released on 2013-10-08 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neither pest management nor resistance management can occur with only an understanding of pest biology. For years, entomologists have understood, with their use of economic thresholds, that at least a minimal use of economics was necessary for proper integrated pest management. IRM is even more complicated and dependent on understanding and using socioeconomic factors. The new edition of Insect Resistance Management addresses these issues and much more. Many new ideas, facts and case studies have been developed since the previous edition of Insect Resistance Management published. With a new chapter focusing on Resistance Mechanisms Related to Plant-incorporated Toxins and heavily expanded revisions of several existing chapters, this new volume will be an invaluable resource for IRM researchers, practitioners, professors and advanced students. Authors in this edition include professors at major universities, leaders in the chemical and seed industry, evolutionary biologists and active IRM practitioners. This revision also contains more information about IRM outside North America, and a modeling chapter contains a large new section on uncertainty analysis, a subject recently emphasized by the U.S. Environmental Protection Agency. The final chapter contains a section on insecticidal seed treatments. No other book has the breadth of coverage of Insect Resistance Management, 2e. It not only covers molecular to economic issues, but also transgenic crops, seed treatments and other pest management tactics such as crop rotation. Major themes continuing from the first edition include the importance of using IRM in the integrated pest management paradigm, the need to study and account for pest behavior, and the influence of human behavior and decision making in IRM. Provides insights from the history of insect resistance management (IRM) to the latest science Includes contributions from experts on ecological aspects of IRM, molecular and population genetics, economics, and IRM social issues Offers biochemistry and molecular genetics of insecticides presented with an emphasis on recent research Encourages scientists and stakeholders to implement and coordinate strategies based on local social conditions
Book Synopsis Handbook of Vegetable Pests by : John L. Capinera
Download or read book Handbook of Vegetable Pests written by John L. Capinera and published by Gulf Professional Publishing. This book was released on 2001 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assisting anyone in need of an easy-to-use yet comprehensive survey of all pests likely to be encountered in North America, this handbook provides thorough identification guides, descriptions of pest life history, and pest management recommendations. Including hundreds of illustrations, this guide is cross-referenced to scientific literature, and includes color plates for ease of insect identification.
Book Synopsis The Journal of Agriculture of the University of Puerto Rico by :
Download or read book The Journal of Agriculture of the University of Puerto Rico written by and published by . This book was released on 2008 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1995 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological & Agricultural Index by :
Download or read book Biological & Agricultural Index written by and published by . This book was released on 1991 with total page 2570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soybean written by Hany El-Shemy and published by BoD – Books on Demand. This book was released on 2011-11-02 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Worldwide, soybean seed proteins represent a major source of amino acids for human and animal nutrition. Soybean seeds are an important and economical source of protein in the diet of many developed and developing countries. Soy is a complete protein and soyfoods are rich in vitamins and minerals.Soybean protein provides all the essential amino acids in the amounts needed for human health. Recent research suggests that soy may also lower risk of prostate, colon and breast cancers as well as osteoporosis and other bone health problems and alleviate hot flashes associated with menopause. This volume is expected to be useful for student, researchers and public who are interested in soybean.
Book Synopsis Sterile Insect Technique by : Victor A. Dyck
Download or read book Sterile Insect Technique written by Victor A. Dyck and published by CRC Press. This book was released on 2021-01-06 with total page 1493 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sterile insect technique (SIT) is an environment-friendly method of pest control that integrates well into area-wide integrated pest management (AW-IPM) programmes. This book takes a generic, thematic, comprehensive, and global approach in describing the principles and practice of the SIT. The strengths and weaknesses, and successes and failures, of the SIT are evaluated openly and fairly from a scientific perspective. The SIT is applicable to some major pests of plant-, animal-, and human-health importance, and criteria are provided to guide in the selection of pests appropriate for the SIT. In the second edition, all aspects of the SIT have been updated and the content considerably expanded. A great variety of subjects is covered, from the history of the SIT to improved prospects for its future application. The major chapters discuss the principles and technical components of applying sterile insects. The four main strategic options in using the SIT — suppression, containment, prevention, and eradication — with examples of each option are described in detail. Other chapters deal with supportive technologies, economic, environmental, and management considerations, and the socio-economic impact of AW-IPM programmes that integrate the SIT. In addition, this second edition includes six new chapters covering the latest developments in the technology: managing pathogens in insect mass-rearing, using symbionts and modern molecular technologies in support of the SIT, applying post-factory nutritional, hormonal, and semiochemical treatments, applying the SIT to eradicate outbreaks of invasive pests, and using the SIT against mosquito vectors of disease. This book will be useful reading for students in animal-, human-, and plant-health courses. The in-depth reviews of all aspects of the SIT and its integration into AW-IPM programmes, complete with extensive lists of scientific references, will be of great value to researchers, teachers, animal-, human-, and plant-health practitioners, and policy makers.
