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Author : Anonim
Publisher : Unknown
Page : 28 pages
File Size : 53,8 Mb
Release : 1974
Category : Alfalfa
ISBN : UIUC:30112104058174
Author : United States Department Of Agriculture
Publisher : Forgotten Books
Page : 48 pages
File Size : 44,5 Mb
Release : 2017-11-10
Category : Electronic
ISBN : 0260763500
Excerpt from Standard Tests to Characterize Pest Resistance in Alfalfa Cultivars Biotic agents that incite diseases in alfalfa are bacteria, fungi, viruses, and mycoplasmas. Graham and others (29) reported that at least 70 different pathogens occur in alfalfa and that about 30 limit the growth and production of the crop. A survey of the United States by the Alfalfa improve ment Conference Committee identified 22 diseases that were problems in more than one State. Of these diseases, 19 were identified as problems in enough States so that national distribution and severity maps could be developed. Some research information is available on nearly every important alfalfa disease in the United States but often only one scientist may have worked with a particular disease. Even though information is available and variation in host-plant resistance has been reported for most impor tant diseases, reliable evaluation procedures are available for only bacterial wilt, anthracnose, common leaf spot, downy mildew, fusarium wilt, lepto leaf spot, phytophthora root rot, rust, and verticillium wilt.should both be used to describe cultivar reaction to dis eases. Cultivar evaluations should be based on individual plant scores rather than on solid-seeded plots. A 1 to 5 rat ing when feasible (1 no disease, 5 severely diseased) is favored. Ratings for each pathogen should be based on specific lesion types or degree of infection (some diseases may require fewer or more than five classes). Rating values should be consistent from test to test. Generally, at least 100 plants should be used for evaluating a cultivar, and resistant and susceptible check cultivars should be included in every test. The susceptible check cultivar can be used to estimate percentage of escapes in a test. The cultivar being evaluated should be compared to the resistant check. Standard seed lots of the check cultivars (when available) should be used. Although no agreement was reached on the number of tests required for evaluation, individual scientists should base their decision on the number of escapes and relative precision of their data. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author : Anonim
Publisher : Unknown
Page : 4 pages
File Size : 45,9 Mb
Release : 1974
Category : Alfalfa
ISBN : OCLC:3951867
Author : Anonim
Publisher : Unknown
Page : 44 pages
File Size : 43,7 Mb
Release : 1984
Category : Alfalfa
ISBN : WISC:89052807617
Author : Anonim
Publisher : Unknown
Page : 508 pages
File Size : 46,5 Mb
Release : 1970
Category : Agriculture
ISBN : UIUC:30112102097828
Author : Anonim
Publisher : Unknown
Page : 100 pages
File Size : 46,8 Mb
Release : 1976
Category : Alfalfa
ISBN : STANFORD:36105210380296
Author : Anonim
Publisher : Unknown
Page : 534 pages
File Size : 44,6 Mb
Release : 1972
Category : Agriculture
ISBN : CHI:096844696
Author : United States. Agricultural Research Service
Publisher : Unknown
Page : 34 pages
File Size : 50,6 Mb
Release : 1974
Category : Agriculture
ISBN : MINN:31951P01093278T
Author : Stephen L. Clement,Sharron S. Quisenberry
Publisher : CRC Press
Page : 318 pages
File Size : 41,7 Mb
Release : 2019-04-23
Category : Science
ISBN : 142004933X
An excellent reference book for plant breeders and entomologists, Global Plant Genetic Resources for Insect-Resistant Crops combines germplasm preservation with use in insect-resistant crop development and basic research. The contributions of the authors represent the efforts, cooperation, and understanding of world leaders in the conservation and use of global plant genetic resources for sustainable agricultural production. Concepts addressed include dependency of modern agriculture on chemical pest control and applications of biotechnology in use of natural plant genes for insect-resistant crops. Marketing Class Code: 1E, 1G, 9C
Author : Anonim
Publisher : Unknown
Page : 88 pages
File Size : 44,6 Mb
Release : 1975
Category : Alfalfa
ISBN : STANFORD:36105211194605
Author : Fred W. Blaisdell,Harry Hunt Converse,Herman F. Mayes,W. M. Bugbee,Bryon S. Miller,Albert H. Graves
Publisher : Unknown
Page : 598 pages
File Size : 54,6 Mb
Release : 1976
Category : Beet sugar
ISBN : UIUC:30112033047629
Author : Anonim
Publisher : Unknown
Page : 24 pages
File Size : 46,9 Mb
Release : 1982
Category : Alfalfa
ISBN : UIUC:30112019263406
Author : Michael D. Casler,Ronny R. Duncan
Publisher : John Wiley & Sons
Page : 386 pages
File Size : 43,8 Mb
Release : 2003-01-30
Category : Architecture
ISBN : 0471444103
The cultivation of various turfgrasses has evolved into a dynamic, multi-billion dollar industry. Yet, there is still a real lack of information available for those seeking to understand the complex science behind its growth. This book, edited by two knowledgeable and highly respected experts, presents for the first time a comprehensive study of the various types of turfgrasses, their genetic and biological makeup, and the specifics of when, how, where and why each species was adapted for use. The only book that deals specifically with the science behind the major types of turfgrasses, Turfgrass Biology will prove to be an invaluable, time-saving reference and research tool for professionals interested or engaged in the genesis of turfgrasses.
Author : Jules Janick
Publisher : John Wiley & Sons
Page : 245 pages
File Size : 42,6 Mb
Release : 2011-01-11
Category : Science
ISBN : 9781118061121
Plant Breeding Reviews is an ongoing series presenting state-of-the art review articles on research in plant genetics, especially the breeding of commercially important crops. Articles perform the valuable function of collecting, comparing, and contrasting the primary journal literature in order to form an overview of the topic. This detailed analysis bridges the gap between the specialized researcher and the broader community of plant scientists.
Author : Anonim
Publisher : Unknown
Page : 508 pages
File Size : 48,8 Mb
Release : 1978
Category : Agriculture
ISBN : UCBK:C073497139
