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Mechanisms Of Host Plant Resistance In Corn To The Corn Earworm Heliothis Zea Boddielepidoptera
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Book Synopsis Mechanisms of Host Plant Resistance in Corn to the Corn Earworm Heliothis Zea (Boddie) (Lepidoptera, Noctuidae) by : Richard W. Straub
Download or read book Mechanisms of Host Plant Resistance in Corn to the Corn Earworm Heliothis Zea (Boddie) (Lepidoptera, Noctuidae) written by Richard W. Straub and published by . This book was released on 1973 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigations Into the Mechanisms of Host Plant Resistance in Corn to the Corn Earworm Heliothis Zea (lepidoptera by : Richard W. Straub
Download or read book Investigations Into the Mechanisms of Host Plant Resistance in Corn to the Corn Earworm Heliothis Zea (lepidoptera written by Richard W. Straub and published by . This book was released on 1968 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Techniques for Efficient Mass Rearing and Infestation in Screening for Host Plant Resistance to Corn Earworm, Heliothis Zea by : John A. Mihm
Download or read book Techniques for Efficient Mass Rearing and Infestation in Screening for Host Plant Resistance to Corn Earworm, Heliothis Zea written by John A. Mihm and published by . This book was released on 1982 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The practice of growing varieties, lines or hybrids resistant to attack by insects, and their subsequenty effectiveness in reducing pest populations and corresponding crop losses, is well documented for several agricultural crops and pest species. The development of many of these resitant cultivars has resulted from or been facilitated by many years of study of the insect pests, the development of techniques to mass rear the insects, artificially infest the crop species, and screen the germplasm of the species (or their wild relatives) for resistance, and the successful application of appropriate breending procedures for improvement of the resistance characteristic over succeeding cycles or generations of population improvement (Guthrie, 1974, 1980). The basic components necessary to identify or developed germaplasm with resitance, or with higher levels of resistance than present cultivars utilized by farmer/producers, include: (1) A colony of the insect species, which exhibits the vigor and vitality of the damaging pest population within the geographical area that is affected. (2) The capability to efficiently mass culture the species, including the rearing facility, trained personnel, natural, meridic, or defined diets, and rearing procedures and containers. (3) Germaplasm resources that area representative of the genetic variation within the crop and/or its closely related species. (4) Methods for uniform artificial infestation. (5) Methods for assessing resultant damage, or lack of damage, to the plants subjected to deliberate infestation (rating scales to determine classes or categories of resistance or susceptibility). (6) Screening to determine whether adequate levels of resistance exist within suitable agronomic types (equivalent or better than currently grown cultivars), and effective selection/breeding scheme established to improve either the resistance levels or agronomic characteristics of the "improved" materials.
Book Synopsis The Corn Earworm Heliothis Zea (Boddie) as an Insect of Local Origin in Southern Wisconsin by : Baldev Singh Mangat
Download or read book The Corn Earworm Heliothis Zea (Boddie) as an Insect of Local Origin in Southern Wisconsin written by Baldev Singh Mangat and published by . This book was released on 1965 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecology of the Corn Earworm, Heliothis Zea (Boddie), in Northern California by : Gerardo Raúl Vélez
Download or read book Ecology of the Corn Earworm, Heliothis Zea (Boddie), in Northern California written by Gerardo Raúl Vélez and published by . This book was released on 1970 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resistance in Corn to the Corn Earworm, Heliothis Zea, and the Fall Armyworm, Spodoptera Frugiperda (Lepidoptera: Noctuidae). by :
Download or read book Resistance in Corn to the Corn Earworm, Heliothis Zea, and the Fall Armyworm, Spodoptera Frugiperda (Lepidoptera: Noctuidae). written by and published by . This book was released on 1967 with total page 3 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 Resistance in Corn to the Corn Earworm, Heliothis Zea, and the Fall Armyworm, Spodoptera Frugiperda (lepidoptera: Noctuidae). by : William Wallard McMillian
Download or read book Resistance in Corn to the Corn Earworm, Heliothis Zea, and the Fall Armyworm, Spodoptera Frugiperda (lepidoptera: Noctuidae). written by William Wallard McMillian and published by . This book was released on 1967 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corn Earworm by : Jane Marie Struttmann
Download or read book Corn Earworm written by Jane Marie Struttmann and published by . This book was released on 1995 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Defense Mechanisms of the Corn Earworm, Heliothis Zea (Boddie), Against Invading Micro-organisms by : Peter Yee-Kong Cheung
Download or read book Defense Mechanisms of the Corn Earworm, Heliothis Zea (Boddie), Against Invading Micro-organisms written by Peter Yee-Kong Cheung and published by . This book was released on 1977 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Insect-host Interactions Between Corn Earworm, Heliothis Zea (Boddie) and Corn, Zea Mays (L.) by : Stephen M. White
Download or read book Insect-host Interactions Between Corn Earworm, Heliothis Zea (Boddie) and Corn, Zea Mays (L.) written by Stephen M. White and published by . This book was released on 1981 with total page 124 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 :
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 A Genetic Analysis of Corn Earworm (Heliothis Zea Boddie) Resistance in Maize (Zea Mays L.) by : John R. Attewell
Download or read book A Genetic Analysis of Corn Earworm (Heliothis Zea Boddie) Resistance in Maize (Zea Mays L.) written by John R. Attewell and published by . This book was released on 1984 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Plant Resistance to Insects by : C. Michael Smith
Download or read book Plant Resistance to Insects written by C. Michael Smith and published by Wiley-Interscience. This book was released on 1989-10-02 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is plant resistance to insects? How is plant resistance to insects obtained? How can plant resistance to insects be utilized?
Download or read book Insect Resistant Maize written by and published by CIMMYT. This book was released on 1997 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanisms and bases of resistance; The genetics of resistance; Biotechnological manipulation of resistance; Advances in techniques, rearing, rating bioassays, mechanism detection; Resistance verification and utilization; Country reports.
Book Synopsis The Protection of Corn, 1980-November 1984 by : Charles N. Bebee
Download or read book The Protection of Corn, 1980-November 1984 written by Charles N. Bebee and published by . This book was released on 1985 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: