Download or read book Studies on the Seasonal Abundance and Spatial Pattern of the Pea Aphid Macrosiphum Pisi Harris in Alfalfa and Alfalfa red Clover Fields in Central New York written by Howard Yost Forsythe and published by . This book was released on 1962 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1970 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alfalfa Abstracts written by American Dehydrators Association and published by . This book was released on 1963 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts written by and published by . This book was released on 1963-05 with total page 1756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstracts of dissertations and monographs in microform.

Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1961 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1963 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1973 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Union Catalog written by and published by . This book was released on 1956 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.

Download or read book Comprehensive Dissertation Index 1861 1972 Agriculture written by Xerox University Microfilms and published by . This book was released on 1973 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The National Union Catalogs 1963 written by and published by . This book was released on 1964 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1963 with total page 1974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1963 with total page 1866 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Studies of the Pea Aphid Macrosiphum Pisi Kaltenbach with Reference to Its Association with Alfalfa Medicago Sativa written by William George Evans and published by . This book was released on 1954 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index 1861 1972 Author index written by Xerox University Microfilms and published by . This book was released on 1973 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Within season Population Dynamics of the Pea Aphid Acyrthosiphon Pisum Harris on Alfalfa written by William Dale Hutchison and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1984 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Parasite Complex of the Pea Aphid Acyrthosiphon Pisum Harris on Alfalfa in Western Oregon written by Alfred Gordon Dickie and published by . This book was released on 1970 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was initiated in the Spring of 1966 for the purpose of determining the present status and effectiveness of imported parasitic wasps of the pea aphid in the Willamette Valley of western Oregon. The pea aphid is a serious pest throughout the pea and alfalfa growing regions of the United States and Canada. In the Willamette Valley of western Oregon it is common on alfalfa, red clover and vetch. Since the use of pesticides to control the pea aphid is attended by serious difficulties, it has long been felt that biological control methods are necessary. These rely on parasites to control the aphid populations. In recent years, the importation, augmentation and re. lease of small parasitic wasps belonging to the genus Aphidius has been done on a wide scale throughout the legume growing regions of North America. Beginning in 1961 several introductions were made locally in the Willamette Valley. The European species Aphidius avenae and Aphidius urticae (=Aphidius ervi ervi); and the eastern variety of the native parasite, Aphidius pisivorus (=Aphidius ervi pulcher) were released at the Hyslop Agronomy Experiment Farm near Corvallis in 1961. Recoveries of specimens identified as Aphidius pisivorus (=Aphidius ervi pulcher) were made at the Hyslop Farm in 1963. Releases of the Indian wasp Aphidius smithi were made at Dayton in Yamhill County in 1961 but no recoveries of this species were reported prior to the start of this investigation. Field data in regard to aphids, parasites, and predators were collected at weekly intervals from the experimental alfalfa plots at the Hyslop Agronomy Farm and the parasites from these collections were reared and identified. In addition to the Hyslop collections, parasites were collected and reared from other localities in the Willamette Valley which included the original release site of Aphidius smithi near Dayton. For purposes of comparison, experimental plots of alfalfa at Klamath Falls were also sampled on several occasions throughout the summer of 1966. The results of collections made in the Willamette Valley during the summer of 1966 showed that the imported Indian wasp Aphidius smithi was well established as a parasite of the pea aphid. The imported European species, Aphidius ervi ervi was also established but in much smaller numbers. The native variety, Aphidius ervi pulcher was rarely encountered and appears not to be exclusively specific on the pea aphid. In conjunction with other control factors, particularly predators, the Indian wasp is an effective control agent and has come to occupy a previously unfilled ecological niche in the pea aphid-parasitepredator complex in the Willamette Valley. A survey of the hyper-parasites indicated that they were of minor importance during the 1966 season.

Download or read book Effects of Temperature and Humidity on the Biology of the Spotted Alfalfa Aphid Therioaphis Maculata Buckton and the Pea Aphid Macrosiphum Pisi Harris Feeding on Selected Alfalfa Clones written by Albert Isaak and published by Hassell Street Press. This book was released on 2021-09-09 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.