Download or read book Effects of the Pea Aphid Acyrthosiphon Pisum Harris on a Pea Pisum Sativum L rhizobium Rhizobium Leguminosarum Frank Symbosis written by Gautam Mohan Sirur and published by . This book was released on 1983 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Variation in the Effects of Host Plant on the Pea Aphid Acyrthosiphon Pisum Harris Homptera aphididae written by S. M. Chandrasiri Subasinghe and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Chemosterilants and Growth Regulators on the Pea Aphid Acyrthosiphon Pisum Harris Fed on an Artificial Diet written by Om Parkash Bhalla and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pea Aphid Acyrthosiphon Pisum Harris Populations on Cultivars of Field Peas in Manitoba and Their Effects on Pea Yield written by Juliana Soroka and published by . This book was released on 1989 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research for this project was undertaken from 1984 to 1987. Natural infestations of pea aphids, Acyrthosiphon pisum (Harris), were measured throughout the summer on five (1984) or six (1985, 1986) cultivars of field peas in small field plots near Glenlea, Manitoba. sarting from equal numbers of pea aphids per cage, in 1986 pea aphid populations were also monitored in 1 m3 field cages which contained plants of one of these six field pea cultivars. Throughout the summers of 1985 and 1986 pea aphids were also sampled in a total of nine Century, four Trapper and two Triumph commercial pea fields in several regions across the province. In all of these tests, pea aphid population growth patterns were similar among cultivars. Aphid numbers rose from low levels during the vegetative to blooming stages of plant growth in mid-July, peaked in late July or early August as pods developed and matured, and declined rapidly by mid- to late August as pea plants senesced. However, numbers of pea aphids at the time of population peak differed consistently and significantly with the cultivar upon which they grew. Peak numbers of pea aphids were larger on Triumph or Trapper plants than they were on Century or Tipu plants. In commercial fields, populations of pea aphids rose more rapidly on Trapper than they did on Century or Triumph plants. In field plots seed weight was the yield component most sensitive to aphid feeding. Triumph had significantly lower seed yields in infested than in control subplots in two out of three years. Seed weight was significantly reduced in infested subplots of Tara peas in one year. Because aphid numbers were low and generally occurred later than at flowering or pod initiation in Century peas, no yield losses due to pea aphids occurred in this cultivar in any of the tests. However, linear regression of seed weight over aphid density indicated that, of the cultivars tested, Century is most susceptible to increasing aphid numbers. Trapper seed weight was least related to aphid density despite the relatively high numbers of pea aphids occurring on this cultivar. In laboratory studies pea aphids had the greatest intrinsic rates of natural increase rm, on the cultivar Trapper and the smallest on the cultivars Tipu and Century. Ten days after infestation, the most antixenosis resistance was expressed by the cultivar Tipu, and the least by Triumph. After 20 days, Triumph still was most preferred by the aphid. Trapper appeared somewhat tolerant of the effects of pea aphid feeding.

Download or read book Effects of Some Herbicides and Plant Growth Regulators on the Pea Aphid Acyrthosiphon Pisum Harris Caged on Treated Broad Bean Vicia Faba L written by Arthur Grant Robinson and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Chemosterilants and Growth Regulators on the Pea Aphid Acyrthosiphon Pisum Harris Fed on an Artificial Diet microform written by Bhalla, Om Parkash and published by National Library of Canada. This book was released on 1967 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Some Herbicides and Plant Growth Regulators on the Pea Aphid Acyrthosiphon Pisum Harris Caged on Treated Broad Bean Vicia Faba L written by Arthur G. Robinson and published by . This book was released on 1961 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Bibliography of the Pea Aphid Acyrthosiphon Pisum Harris Homoptera Aphididae written by and published by . This book was released on 1978 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Integrated Approach to Pest Management in Field Pea Pisum Sativum L with Emphasis on Pea Aphid Acyrthosiphon Pisum Harris written by Ali Kemal Ahmed and published by . This book was released on 2002 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pea Aphid Acyrthosiphon Pisum Harris Populations on Cultivars of Field Peas in Manitoba and Their Effects on Pea Yield written by Juliana Soroka and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of the Maternal Rearing Environment on Pea Aphid Acyrthosiphon Pisum Trophic Interactions written by Jennifer M. Slater and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taking account of MREs could provide a better understanding of the factors influencing the fitness of many organisms interacting in natural and managed ecosystems.

Download or read book Pea Aphid Acyrthosiphon Pisum Harris written by Canada. Agriculture Canada and published by . This book was released on 1981 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bioeconomics of Pea Aphids Acyrthosiphon Pisum Harris on Commercial Dry Peas Pisum Sativum Aragorn written by Bradley Scott Stokes and published by . This book was released on 2012 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of the Maternal Rearing Environment on Pea Aphid Acyrthosiphon Pisum Trophic Interactions written by Jennifer M. Slater and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seasonal Life History Abundance and Biology of the Parasitoids of the Pea Aphid Acyrthosiphon Pisum Harris in Manitoba written by Frank Oliver Matheson and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonal life history, abundance and biology of the parasitoids of the pea aphid, Acyrthosiphon pisum (Harris) in Manitoba. A survey of the parasitoids of the pea aphid was conducted in alfalfa and field peas in the Red River Valley area of Manitoba during 1981-85. Five primary parasitoids and twelve secondary parasitoids were collected. The five primary parasitoids, all aphidiids, were: Praon occidentale Baker, Praon pequodorum Viereck, Aphidius ervi Haliday, Aphidius pisivorus Smith and Aphidius smithi sharma and Subba Rao. P. pequodorum and A. ervi comprised most of the primary parasitoids each year. A. smithi was not found prior to the introduction of this parasitoid in Manitoba in 1983. The twelve secondary parasitoids, including 8 identified to the species level, were: five pteromalids, Asaphes lucens (Provancher), Coruna clavata Walker, Pachycrepoideus vindemiae (Rondani), Pachyneuron siphonophorae (Ashmead), Pachyneuron sp.; three alloxystids, Alloxysta victrix (Westwood), Alloxysta megourae complex, Phaenoglyphis ambrosiae (Ashmead); three megapilids, Dendrocerus carpenteri (Curtis), Dendrocerus sp. a. Dendrocerus sp. and one encyrtid, Aphidencyrtus aphidivorus (Mayr). A. lucens was the most abundant secondary parasitoid collected each year. The percentage parasitism of the pea aphid by the primaries was determined for 1983-85 by both rearing and dissecting aphids collected from stem samples in the field. The relative abundance of the adult primary parasitoids for 1981-85 was determined from D-Vac collections, and for both the primary and secondary species from emergence from field-collected mummies. Seasonal changes in the abundance of the parasitoids are discussed.

Download or read book Some Factors Affecting the Transmission of Pea Enation Mosaic Virus by the Pea Aphid Acyrthosiphon Pisum harris with Emphasis on the Inoculation Phase of the Transmission Cycle written by James Hsi-cho Tsai and published by . This book was released on 1969 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economic Injury Level Action Threshold and Population Development of the Pea Aphid Acyrthosiphon Pisum Harris Homoptera Aphididae on Green Peas Pisum Sativum L written by George Craig Yencho and published by . This book was released on 1985 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: