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Biological Bases Of Alfalfa Resistance To Pea Aphid Acyrthosiphon Pisum Harris
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Book Synopsis Biological Bases of Alfalfa Resistance to Pea Aphid, Acyrthosiphon Pisum (Harris) by : Emiliana N. Bernardo
Download or read book Biological Bases of Alfalfa Resistance to Pea Aphid, Acyrthosiphon Pisum (Harris) written by Emiliana N. Bernardo and published by . This book was released on 1968 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Certain Environmental Factors on Inherent Resistance in Selected Alfalfa Clones to the Pea Aphid, Acyrthosiphon Pisum (Harris), and the Spotted Alfalfa Aphid, Theriophis Maculata (Buckton) by : Albert Isaak
Download or read book Influence of Certain Environmental Factors on Inherent Resistance in Selected Alfalfa Clones to the Pea Aphid, Acyrthosiphon Pisum (Harris), and the Spotted Alfalfa Aphid, Theriophis Maculata (Buckton) written by Albert Isaak and published by . This book was released on 1964 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Testing for Biotypes of the Pea Aphid, Acyrthosiphon Pisum (Harris), by Alfalfa Cultivar Reaction in the Seedling Stage by : Scott Jeffrey Sargent
Download or read book Testing for Biotypes of the Pea Aphid, Acyrthosiphon Pisum (Harris), by Alfalfa Cultivar Reaction in the Seedling Stage written by Scott Jeffrey Sargent and published by . This book was released on 1987 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Parasite Complex of the Pea Aphid, Acyrthosiphon Pisum (Harris) on Alfalfa in Western Oregon by : Alfred Gordon Dickie
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.
Book Synopsis Pea Aphid Acyrthosiphon Pisum (Harris), (Homoptera: Aphididae), and Alfalfa Plant Responses by : Martha K. Lordier
Download or read book Pea Aphid Acyrthosiphon Pisum (Harris), (Homoptera: Aphididae), and Alfalfa Plant Responses written by Martha K. Lordier and published by . This book was released on 1988 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Bulletin written by and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Illustrated Summary of Genetic Traits in Tetraploid and Diploid Alfalfa by : Donald Kay Barnes
Download or read book An Illustrated Summary of Genetic Traits in Tetraploid and Diploid Alfalfa written by Donald Kay Barnes and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Illustrated Summary of Genetic Traits in Tetraploid and Diploid Alfalfa by : D. K. Barnes
Download or read book An Illustrated Summary of Genetic Traits in Tetraploid and Diploid Alfalfa written by D. K. Barnes and published by . This book was released on 1967 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pesticides Documentation Bulletin by :
Download or read book Pesticides Documentation Bulletin written by and published by . This book was released on 1968 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index, 1861-1972: Biological sciences: biology and zoology by : Xerox University Microfilms
Download or read book Comprehensive Dissertation Index, 1861-1972: Biological sciences: biology and zoology written by Xerox University Microfilms and published by . This book was released on 1973 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Biology and Pathology of Dwarfmistletoe by : D. K. Barnes
Download or read book The Biology and Pathology of Dwarfmistletoe written by D. K. Barnes and published by . This book was released on 1967 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biology and Ecology of Aphids by : Andreas Vilcinskas
Download or read book Biology and Ecology of Aphids written by Andreas Vilcinskas and published by CRC Press. This book was released on 2016-02-22 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most people know of aphids as garden pests, infesting the soft green tissues of plants in vast numbers and killing them by sucking out the sap. Indeed, among the 4000 or so known species of aphids about 250 are pests, and in temperate regions several are economically important agricultural pests that damage crops directly during feeding or act as v
Download or read book Insect-plant Interactions written by and published by National Academies. This book was released on 1969 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Agroclimatology by : Jerry L. Hatfield
Download or read book Agroclimatology written by Jerry L. Hatfield and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Can we unlock resilience to climate stress by better understanding linkages between the environment and biological systems? Agroclimatology allows us to explore how different processes determine plant response to climate and how climate drives the distribution of crops and their productivity. Editors Jerry L. Hatfield, Mannava V.K. Sivakumar, and John H. Prueger have taken a comprehensive view of agroclimatology to assist and challenge researchers in this important area of study. Major themes include: principles of energy exchange and climatology, understanding climate change and agriculture, linkages of specific biological systems to climatology, the context of pests and diseases, methods of agroclimatology, and the application of agroclimatic principles to problem-solving in agriculture.
Download or read book Dissertation Abstracts written by and published by . This book was released on 1968 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecology of the Pea Aphid in the Blue Mountain Area of Eastern Washington and Oregon by : William C. Cooke
Download or read book Ecology of the Pea Aphid in the Blue Mountain Area of Eastern Washington and Oregon written by William C. Cooke and published by . This book was released on 1963 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interaction Effects of Host Plant Resistance (HPR) and Biological Control (BC) on the Dynamics of Three Aphid Species in Alfalfa by : Patrick Ruggle
Download or read book Interaction Effects of Host Plant Resistance (HPR) and Biological Control (BC) on the Dynamics of Three Aphid Species in Alfalfa written by Patrick Ruggle and published by . This book was released on 1992 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: