Zobrazeno 1 - 10
of 59
pro vyhledávání: '"F. L. McEwen"'
Publikováno v:
Journal of Economic Entomology. 84:1339-1343
studies with the granular insecticides chlorfenvinphos, chlorpyrifos, isofenphos, and terbufos showed that when these are applied properly as in-furrow treatments for the control of the onion maggot in organic soil, good control is obtained of the fi
Autor:
F. L. McEwen, L. P. Milligan
Publikováno v:
Journal of Agricultural and Environmental Ethics. 5:107-109
The report entitled “An Analysis of the Canadian Research and Development System for Agriculture/Food” which was presented to the Science Council of Canada in July, 1991 contains many far-reaching recommendations for revisions of the research and
Autor:
F. L. Mcewen, H. J. Liu
Publikováno v:
Environmental Entomology. 8:512-515
The initiation of post-diapause development in Blissus leucopterus hirtus was marked by oogenesis in overwintered females. Its temperature threshold was established as 7°C. Sequential sampling and chemical applications were timed from a knowledge of
Autor:
F. L. McEwen, K. S. S. Nair
Publikováno v:
The Canadian Entomologist. 108:1021-1030
In Hylemya brassicae (Bouché) little oviposition occurred when access to host plant material was denied. The mustard oil, allyl isothiocyanate (AITC), stimulated the flies into greater activity and attracted them to its source. Sinigrin and four oth
Autor:
J. A. Keith Reid, F. L. McEwen
Publikováno v:
The Canadian Entomologist. 109:1287-1291
A method for the direct isolation of useful genetic strains was shown effective in the onion maggot. This method circumvents the extensive preliminary investigations called for by current concepts in genetic population control. From genomes treated w
Autor:
F. L. McEwen
Publikováno v:
BioScience. 28:773-777
food is lost to pests and that in rice, the most important of all human foods, this loss is a staggering 46%. The 33% loss represents the potential to increase our food supply by 50% if pest losses could be eliminated. Underscoring this is the fact t
Publikováno v:
Pesticide Science. 12:614-618
Field tests, in which several insecticides were applied at equal rates by ground sprayer to oats, rye and alfalfa, showed that residues 1 h after application were much lower for highly volatile compounds than for those of lower volatility. Varying th
Autor:
R. A. Butts, F. L. McEwen
Publikováno v:
The Canadian Entomologist. 113:127-131
The life history of Plutella xylostella (L.) was studied in plantings of Brussels sprouts at Cambridge, Ontario in 1977 and 1978. Adults were monitored by using sticky traps constructed of bristol board; eggs, larvae, and pupae were monitored by samp
Publikováno v:
The Canadian Entomologist. 108:1031-1036
Leaves of each of six cruciferous plant species investigated contained glucosinolates. There was no correlation between the total glucosinolate concentration of the species (identity of the glucosinolates unknown) and the oviposition response of the
Publikováno v:
Environmental Entomology. 11:751-755
Field studies in which onion maggot, Hylema antiqua (Meigen) (Diptera: Anthomyiidae), populations were monitored for adult emergence and peak activity, ovarian development, oviposition periods, and larval damage confirmed that a scheme of predictions