Journal of the Entomological Society of British Columbia
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Records of tick paralysis in livestock in British Columbia
Get PDFNote: The "abstract" is actually the entire paper
The polymorphism in Philaenus spumarius (L.) (Hemiptera: Cercopidae) in British Columbia
No full textThis paper analyses the distribution and relative frequency of the morphs of <i>Philaenus spumarius</i> in British Columbia, the populations being drawn from different biotic areas. 1t is shown that nine morphs occur in the province and of these, <i>marginellus</i> occurs only in the south-west corner; <i>marginellus</i> and <i>lateralis</i> occur only as females. The frequency of the morphs in the biotic areas of the province is not uniform; populations in dry areas differ signIficantly from those in wet areas. Populations taken from the various forest areas are not identical, nor are those from coastal areas. Within a single biotic area, the frequency of morphs appears to be stable. No significant difference was determined between two samples taken sixteen years apart. Further, there appears to be no significant seasonal, daily or hourly change in the morph frequency in an area. An experiment carried out on mating individuals failed to demonstrate a tendency for non-random mating and there was no evidence for the preferential mating of the rarer types
A method for determining the dosage-mortality curve of malathion against the pea aphid, Acyrlthosiphom pisum (Harris) (Homoptera: Aphididae)
Get PDFThe procedures of a reliable method for establishing the dosage-mortality curve for malathion and the pea aphid, <i>Acyrthosiphon pisum</i> (Harris), are described and evaluated. They include the choice of insecticide formulation, the conditions for rearing and collecting, the holding of treated aphids, and the analysis of mortality data. The LD50 of actual malathion in acetone solution to the pea aphid is 23.5 nanograms per aphid. The 95% fiducial limits about this estimate are 22.9 and 24.1 nanograms per aphid. The slope, ± S.E. (n=7) of the log-dosage:probit-mortality line is 5.5 ± 0.4
Syrphidae collected mostly in southern areas of the Okanagan Valley, British Columbia
No full textA list of 39 species of adult Syrphidae in 18 genera is presented with their hosts and month of capture. The specimens were collected in 1967 and 1968, mostly in the vicinity of Oliver, Osoyoos, and Mt. Kobau in the Okanagan Valley, British Columbia
Laboratory rearing of Notonecta undulata Say (Hemiptera: Notonectidae)
No full textFour generations of <i>Notonecta undulata</i> Say were reared in the laboratory within a year. Adults were kept in 15 gallon oviposition aquaria maintained at a temperature of 25 +/- 1∞C and a pH of 6.5 - 7.5. Eggs were transferred to an incubation aquarium kept under identical conditions. Nymphs were reared individually in 100 ml glass beakers. Live prey were supplied regularly for food
Taeniothrips orionis oviposition and feeding injury on cherries
No full textOviposition by overwintered <i>Taeniothrips orionis</i> Treherne in the ovaries of cherry flowers and immature fruits during early May caused injury which resulted in dimple-like depressions on the mature fruits. The damage was widespread in the Okanagan Valley in 1971. First brood adults oviposited in cherry fruits during late June and early July but the injury caused at this time was less pronounced. Feeding injury by larvae caused russeting on fruits and chlorotic areas paralleling secondary veins on leaves
