Zobrazeno 1 - 10
of 20
pro vyhledávání: '"B. D. Frazer"'
Publikováno v:
The Canadian Entomologist. 116:861-870
Maris Kestrel kale, Brassica oleracea L., was planted and sampled in two locations during 1977–78. The aphids Brevicoryne brassicae (L.) and Myzus persicae (Sulzer), syrphids in the genera Syrphus and Scaeva, the cecidomyiid Aphidoletes aphidimyza
Publikováno v:
The Canadian Entomologist. 116:879-888
Developmental time, fecundity, adult weight, numbers, and age distribution of Brevicoryne brassicae (L.) and leaf area and plant quality of Maris Kestrel kale, Brassica oleracea L., were determined at three aphid densities and two watering rates in a
Autor:
B. D. Frazer, B. Gill
Publikováno v:
The Canadian Entomologist. 113:1025-1033
Hunger and abundance of adult Coccinella californica (Mannerheirn) preying on pea aphids, Acyrthosiphon pisum (Harris), on alfalfa, Medicago sativa L., were assessed in the field. There was no consistent relationship between abundance or hunger and a
Autor:
P. M. Ives, Vincent G. Nealis, Charles G. Summers, N. Gilbert, B. D. Frazer, D. A. Raworth, Andrew Paul Gutierrez, J. U. Baumgaertner, B. Gill
Publikováno v:
The Canadian Entomologist. 113:975-980
Frazer and Gilbert (1976) described the predation of pea aphids, Acyrthosiphon pisum (Harris), by adult coccinellids. They developed a formula to predict the predation rate as a function of temperature, predator density, and prey age-distribution and
Autor:
D. A. Raworth, B. D. Frazer
Publikováno v:
The Canadian Entomologist. 117:153-161
Searching for adult coccinellids in large cages placed over sections of strawberry fields produced an average of 10 times as many coccinellids per metre of row as a relative method of sampling. Methods of converting relative indices to absolute indic
Autor:
B. Gill, B. D. Frazer
Publikováno v:
The Canadian Entomologist. 113:739-745
The fecundity, survivorship, and rate of development of the lupine aphid Macrosiphum albifrons Essig were determined and summarized into life tables from which the intrinsic rate of increase was computed. The life tables, using a time scale in days,
Publikováno v:
Bulletin of Entomological Research. 77:201-212
Holocyclic populations of aphids of the Chaetosiphon (Pentatrichopus) fragaefolii (Cockerell) group from Fragaria in British Columbia were found to have a homozygous 2n = 12 female karyotype, whereas samples from predominantly anholocyclic population
Publikováno v:
The Canadian Entomologist. 113:1035-1041
A series of field experiments using large field cages were used to evaluate the role of aphidophagous predators on the population dynamics of the pea aphid, Acyrthosiphon pisum (Harris), on alfalfa, Medicago sativa L. The pea aphid numbers increased
Publikováno v:
The Canadian Entomologist. 113:1043-1046
We studied first and fourth instar larvae of Coccinella trifasciata L., C. Californica Mannerheim, C. undecimpunctata L., and Cycloneda polita Casey searching for Acyrthosiphon pisum (Harris) on alfalfa seedlings and for A. dirhodum (Walker) on oat s
Publikováno v:
Hilgardia. 47:1-13
The interrelationship of an Iranian ecotype of Trioxys pallidas (Hal.) (Hymenoptera: Aphidiidae) and the walnut aphid, Chromaphis juglandicola (Kale), (Homoptera: Callaphididae), was assessed over a 4-year period at two localities in California. Limi