Download or read book Studies on the Pea Aphid Acyrthosiphon Pisum Harris Hom Aphididae with Specialreference to the Differences in Te Biology of the Green and Red Forms written by M. Markkula and published by . This book was released on 1963 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Pea Aphid Acyrthosiphon Pisum Harris Hom Aphididae written by and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Pea Aphid Acyrthosiphon Pisum Harris Hom Aphididae with Special Reference to the Differences in the Biology of the Green and Red Forms written by Martii Markkula and published by . This book was released on 1963 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selostus: Tutkimuksia hernekirvasta, erityisesti sen vihreän ja punaisen muodon biologian eroista.
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 The Cornicles and Associated Tissues of the Pea Aphid Acyrthosiphon Pisum Harris Homoptera Aphididae a Light and Electron Microscopical Study of Their Structure with a Discussion on Possible Function written by Kay Chaffey Lindsay and published by . This book was released on 1968 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Photoperiodic Responses and Long distance Movements of Populations of Pea Aphid Acyrthosiphon Pisum Harris Homoptera Aphididae written by Marjorie Anne Henderson Smith and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Bibliography of the Pea Aphid Acyrthosiphon Pisum Harris Homoptera written by A.M. Harper and published by . This book was released on 1978 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Photoperiodic Responses and Long distance Movements of Populations of Pea Aphid Acyrthosiphon Pisum Harris Homoptera Aphididae microform written by Marjorie Anne Henderson Smith and published by National Library of Canada. This book was released on 1987 with total page 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 M. Ellsbury and published by . This book was released on 1981 with total page 14 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 United States. Department of Agriculture and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Electron Microscope Study of the Integument of the Pea Aphid Acyrthosiphon Pisum Harris Homoptera Aphididae to Ascertain Its Penetrability by Entomophagous Fungi written by Carol McKechnie Reeves and published by . This book was released on 1966 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Dispersal Behaviour of Apterous Pea Aphids Acyrthosiphon Pisum Harris written by Bernard D. Roitberg and published by 1977.. This book was released on 1977 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Dispersal Behaviour of Apterous Pea Aphids Acyrthosiphon Pisum Harris written by Bernard D. Roitberg and published by . This book was released on 1977 with total page 158 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 Comparative Host Plant Range Studies of the Blue Alfafa Aphid Acyrthosiphon Kondi Shinji and the Pea Aphid Acyrthosiphon Pisum Harris Homoptera written by M.M. Ellsbury and published by . This book was released on 1981 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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.
