Download or read book Host Plant Resistance in Two Tropical Maize Zea Mays L Populations to the Southwestern Corn Borer Diatraea Grandiosella Dyar the Sugarcane Borer D Saccharalis Fabr written by Daniel G. Hinderliter and published by . This book was released on 1983 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QTL Mapping of Insect Resistance Against Diatraea Spp in Two Populations of F3 Lines in Tropical Maize Zea Mays L written by Martin Bohn and published by . This book was released on 1998 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Studies to Investigate Maize Zea Mays L Leaf Feeding Resistance to Lepidopteran Insect Pests written by Catherine Rose Thome and published by . This book was released on 1991 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A checklist of academic theses produced with support from CIMMYT 1966 2000 written by John E. Woolston and published by CIMMYT. This book was released on 2000 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resistance of Tropical Maize to Fall Armyworm Spodoptera Frugiperda J E Smith and Sugarcane Borer Diatraea Saccharalis F written by Clair H. Hershey and published by . This book was released on 1978 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIMMYT's program for developing resistance to the sugarcane borer has based primarily on screening under natural infestation in an unreplicated insect nursery. To test the effectiveness of that system, the 10 least damaged and 10 most damaged fmilies (based on insect nursery data from 1975 to 1976) from each of 10 CIMMYT population were grown from remnant seed and tested for resistance in 1977 at Poza Rica, Veracruz. Six populations were artificially infested at silking with newly hatched sugarcane borer larvae; the others received only natural infestation. For eight of the 10 populations, the gropu of 10 families selected as most resistent had a lower mean percent damaged internodes than the susceptile group.These means were significatntly different (5% level) for only two of the populations. artificial infestation was effective in increasing dmage as compared to natural infestation only ofr three of the six infested population (mean increase of 7.7% damaged internodes). This was apparently due to low levels of only about 10 to 15 larvae infested per plant. The variation among population for percent damaged internodes was relatively small, with a range of only 24.1% for Cogollero to 33,4% for Antigua X Veracruz 181 (Pedigree selections.) Genetic varation among families was to a large degree masked by a high environmental variability. For three populations additional damage evaluations were made, including number of tunnels per plant, tunnel length per plant, number of tunnels per damaged internode (...).

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1984 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stemborer Resistance of Maize Zea Mays L to Identify Resistance to the Mexican Rice Borer Eoreuma Loftini Dyar written by Michael A. Josephs and published by . This book was released on 1990 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book University of Wisconsin Agronomy Department the First 100 Years written by University of Wisconsin--Madison. Department of Agronomy and published by . This book was released on 2003 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1985 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agronomy News written by and published by . This book was released on 1982 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.

Download or read book Efficient Mass Rearing and Infestation Techniques to Screen for Host Plant Resistance to Maize Stem Borers Diatraea Sp written by John A. Mihm and published by . This book was released on 1983 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The practice of growing varieties, lines or hybrids resistant to attack by insects and their subsequent 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 resistant cultivars has resulted from or been facilitated by (1) many years of study of the insect pests, (2) the developement of techniques to mass near the insects, articially infest the crop species, and screen the germplasm of the species for their wild relatives) for resistance, and (3) the successful application of appropriate breeding procedures for improvement of the resistance characteristic over succeeding cycles or generations of population improvement. The basic components necessary to identify or develop germplasm with resistance, 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) Germplasm resources that are 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 an effective selection/breeding scheme established to improve either the resistance levels or agronomic characteristics of the "improved" materials.

Download or read book Miscellaneous Publications of the Entomological Society of America written by Entomological Society of America and published by . This book was released on 1985 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Reference Guide to Latin America and the Caribbean written by University Microfilms International and published by . This book was released on 1988 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Checklist of Academic Theses Produced with Support from CIMMYT 1966 1996 written by John E. Woolston and published by . This book was released on 1996* with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toward Insect Resistant Maize for the Third World written by International Maize and Wheat Improvement Center and published by CIMMYT. This book was released on 1989 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insect Pests of Maize written by Alejandro Ortega C. and published by CIMMYT. This book was released on 1987 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook, designed to facilitate the identification of common insects affecting maize, contains descriptions and color photographs of pests of the seed, root, and seedling, pests of the foliage and tassel; pests of the stem, ear, and tassel; and pests of the ear and grain. The handbook also includes key for identifying insect pests, a guide to beneficial insects, and a section on insect control.

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1983 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: