Journal of the Entomological Society of British Columbia
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Experiments against carrot rust fly, (Psila rosae (F.)) resistant to cyclodiene organochlorine insecticides
No full textn/
The European pine shoot moth, Rhyacionia buoliana (Lepidoptera: Olethreutidae), another introduced forest pest
No full textThe European pine shoot moth has been reported from Newfoundland and to Ontario, the northeastern U.S., Oregon, Washington and British Columbia, where it was first observed in 1927 near Victoria. Two years of intensive survey show that it is now present in the southwestern part of the province, on southern Vancouver Island and in the Lower Fraser and Okanagan valleys. Although the pest has only been recorded on ornamental trees in urban areas and on nursery stock, there is a serious risk that it may attack ponderosa and lodgepole pines in natural-growing stands. Five specific recommendations are made
Resistance to organochlorine insecticides in the tuber flea beetle, Epitrix tuberis Gent. (Coleoptera: Chrysomelidae), in British Columbia
No full textLaboratory and field experiments showed that <i>Epitrix tuberis</i> Gent. had developed strains that were highly resistant to dieldrin and less so to DDT. Both adults and larvae were resistant to the cyclodiene insecticides. Strains resistant to cyclodienes were centered in the Salmon Arm and Vernon areas. Strains resistant to DDT had a wider range and were present as far north as Pavilion. All tuber flea beetles tested in the province were highly susceptible to diazinon and presumably to other organophosphorus compounds
The western larch borer, Tetropium velutinum Leconte, in Interior British Columbia
No full textn the interior of British Columbia, <i>Tetropium velutinum</i> LeConte is an important borer in the sapwood of western larch, <i>Larix occidentalis</i> Nuttall. Other authors have indicated that this borer was important only as a bark miner and killer of trees. Galleries penetrated to depths of 25 to 47 mm and ranged in total length from 28 to 69 mm. At Vernon, oviposition was from early in May until the end of August. Limited observations showed that the first penetration of the sapwood by the larvae began about 6 weeks after oviposition
Moisture and fat content during the adult life of the ambrosia beetle, Trypodendron lineatum (Oliv.)
No full textDepletion of fat deposits during the long hibernation period of the adult ambrosia beetle, <i>Trypodendron lineatum</i> (Oliv. ), amounts to about one-quarter of the original fat content. The fat loss during flight activity appears to be also about one-quarter of the amount present at the start of hibernation. Experiments with beetles s!ored at different temperatures indicate that during a long cool spring the rate of fat loss increases, probably affecting the vigor of the population during subsequent flight and brood establishment
Insecticides, fungicides and lime combined for control of cabbage maggots, clubroot and wire stem
No full textInsecticides alone or in combinations with lime, mercurous chloride and quintozene were applied to peat and loam soils for control of clubroot, <i>Plasmodiophora brassicae</i> Wor., and cabbage maggot, <i>Hylemya brassicae</i> (Bouché), in cauliflower. The effects were assessed by counting the emergent seedlings, by weighing the mature cauliflowers, and by uprooting plants at harvest and grading the maggot damage and incidence of clubroot. Split applications, one at seeding and one 30 days later with Birlane, Dasanit or carbofuran protected cauliflower from maggot damage until harvest. Carbofuran allowed the least maggot damage in both soils. Zinophos was comparatively effective in peat soil but not in sandy loam. The insecticides had no significant effect on germination or clubroot. Quintozene gave satisfactory protection from clubroot and wire stem in sandy loam and had the 1owest incidence of clubroot in peat soil. The fungicides had no effect on maggot damage, nor did they appear to influence the insecticides. No significant interactions were observed. The effect of the insecticides and fungicides on yield was somewhat masked by over-seeding
