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 Study of the Seasonal Dynamics of a Population of Pea Aphids Acyrthosiphon Pisum Harris in Alfalfa Fields written by R. Bournoville and published by . This book was released on 1978 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Temperature Response Development Models for the Pea Aphid Acyrthosiphon Pisum Harris and the Blue Alfalfa Aphid Acyrthosiphon Kondoi Shinji Using Field Data written by Michael Edward Hochberg and published by . This book was released on 1985 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Host Plant Range Studies of the Blue Alfalfa Aphid Acyrthosiphon Kondoi Shinji and the Pea Aphid Acyrthosiphon Pisum Harris Homoptera Aphididae written by Michael Merton Ellsbury and published by . This book was released on 1981 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book The Effect of Temperature on Population Level Interactions Between the Pea Aphid Acyrthosiphon Pisum Har Homoptera Aphididae and Its Primary Parasitoid Aphidius Ervi Hal Hymenoptera Aphidiidae written by Robert Thiboldeaux and published by . This book was released on 1986 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aphid Biodiversity under Environmental Change written by Pavel Kindlmann and published by Springer Science & Business Media. This book was released on 2010-07-01 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the results of recent research on aphid population dynamics and ecology relevant to current environmental changes resulting from global wa- ing. It incorporates a selection of the contributions presented at the International Symposium on Aphids in Fremantle, Australia, in October 2005, plus some ad- tional invited chapters. The objective was to incorporate the major issues in the ?eld and simultaneously create a closely interrelated and integrated volume. The ?rst chapter sets the scene. Kindlmann and Dixon present a critical review of existing models of aphid population dynamics, examine the biological assumptions that are incorporated in the models and present one of the latest models of aphid metapopulation dynamics. They conclude that natural enemies are unlikely to affect aphid population dynamics late in a season, but in some years may have an effect very early in the season, when aphid colonies are still small and predators might be able to reduce the numbers of colonies. The question, whether aphids will move to different locations, adapt to the change in conditions in their current habitat or go extinct is discussed by Ameixa. She concludes that the distributions of aphids are most likely to change, with the distribution of each species moving globally as their preferred habitat moves in response to changes in the climate, which may be more dif?cult than in the past because of habitat fragmentation and habitat loss.
Download or read book Peter Star Population dynamics parasitization control and prognosis of the pea aphid Acyrthosiphon pisum Harris in Czechoslavakia written by Peter Starý and published by . This book was released on 1974 with total page 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 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:
Download or read book Manipulation of Acyrthosiphon Pisum Harris Populations to Determine Economic Thresholds on Alfalfa in Nebraska written by Miles A. Karner and published by . This book was released on 1981 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics Parasitization Control and Prognosis of the Pea Aphid written by Petr Starý and published by . This book was released on 1974 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nejprve autor probírá výzkumné metody populační dynamiky škůdce hrachových listů mšice Acyrthosiphon pisum Harris a zabývá se v dalších kapitolách celou parazitologickou problematikou tohoto škůdce. V souvislosti s ním věnuje pozornost i specii Aphidius ervi. Provádí srovnání výzkumných metod, pojednává o braní vzorků z populace parazitů, studuje jejich biotypy a účinky insekticidů. Zabývá se jejich taxonomií a relativní četností jejich výskytu v ČSSR, jehož prognózu provádí na základě analýzy povětrnostních podmínek a hodnotí i úlohu zvláštních faktorů výskytu.
Download or read book Aphids as Crop Pests 2nd Edition written by Helmut F van Emden and published by CABI. This book was released on 2017-08-23 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aphids are among the major global pest groups, causing serious economic damage to many food and commodity crops in most parts of the world. This revision and update of the well-received first edition published ten years ago reflects the expansion of research in genomics, endosymbionts and semiochemicals, as well as the shift from control of aphids with insecticides to a more integrated approach imposed by increasing resistance in the aphids and government restrictions on pesticides. The book remains a comprehensive and up-to-date reference work on the biology of aphids, the various methods of controlling them and the progress of integrated pest management as illustrated by ten case histories.
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 Pesticides Documentation Bulletin written by and published by . This book was released on 1965 with total page 260 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 1972 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
