Journal of the Entomological Society of British Columbia
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Occurrence of and attempts to eradicate grape phylloxera (Homoptera: Phylloxeridae) in British Columbia
Get PDFThe chronological occurrence, survey methods, and eradication programs of the grape phylloxera, <i>Phyiloxera vitifoliae</i> (Fitch), in British Columbia are described. The insect was first found in the Okanagan Valley in 1961. Though an eradication program at that time was apparently successful, the insect reappeared in 1971. It is now well established in the area. The pest was accidentally introduced on imported vines
Occurrence of the strawberry tortrix, Acleris comariana (Zeller), a new pest in British Columbia (Lepidoptera: Tortricidae)
No full textNotes on dispersal, longevity and overwintering of adult Pissodes strobi (Peck) (Coleoptera: Curculionidae) on Vancouver Island
No full textObservations of dispersal, longevity and overwintering behavior are recorded. Some adult weevils lived up to 4 years, moved at least 1.2 km, and many overwintered in the upper part s of trees as well as in litter
Life-cycle of a spiral gall aphid, Pemphigus spirothecae (Homoptera: Aphididae), on poplar in British Columbia
Get PDF<i>Pemphigus spirothecae</i> Pass. was inadvertently introduced into North America only recently. Upon hatching in spring on lombardy poplar, the fundatrix feeds on a leaf petiole, which bends and then spirals into a spiral gall. The fundatrix produces about 100 fundatrigeniae within the gall. These produce winged sexuparae which leave the gall and settle on the poplar bark, where they produce up to eight progeny, males and females. Each female lays a single large egg which overwinters on the bark. This aphid is thus monoecious and holocyclic
Carabid and Staphylinid beetles from agricultural land in the lower Fraser Valley, British Columbia
Get PDFPit-traps were emptied every two or three days for two seasons in crop, fallow, and grass plots to determine the species and population density of Carabidae and Staphylinidae associated with agricultural land, and their relationship with brassica crops. Half of the plots were enclosed by plastic barriers and the beetles were trapped to extinction: half were not enclosed. Thirty-three carabid and 16 staphylinid species were captured. The dominant species was the small, generalized. European carabid predator, <i>Bembidion lampros</i>, which had a population on crop and fallow land of about 29000/hectare. It was almost absent in grass. Other numerous carabids were <i>Harpalus aeneus</i>, <i>Calathus fuscipes</i>, and <i>Clivina fossor</i>, all introduced European spp., with populations of almost 2000, 5600, and llOOO/hectare respectively. The first and third of these were scarce in grassland but the second was abundant. In plots of Brussels sprouts <i>Aleochara bilineata</i>, a staphylinid, was effectively parasitic on root maggots, and averaged more than 6000/hectare. Soil cores taken in October centred on a Brussels sprouts plant averaged 26.4 <i>Hylemya puparia</i> per core of which 44% were parasitized by <i>A. bilineata</i>
The aphids (Homoptera: Aphididae) of British Columbia 4. Further additions and corrections
Get PDFTwenty-five species of aphids are added to the taxonomic list of the aphids of British Columbia. New host records, a few corrections, and some name changes are also included
Pest management: Four years experience in a commercial apple orchard
Get PDFPest management in a 12-ha apple orchard from 1973 to 1976 resulted in a 50 percent reduction in the number of sprays that are normally applied to control insects and mites. Codling moth, <i>Laspeyresia pomonella</i> (L.), populations were monitored by sex pheromone traps and populations of other insects and mites were assessed by specific sampling techniques. Leafrollers were the most difficult pests to control and fruit injury was 1.5 to 2.0 percent in 3 of the 4 years. Mites were held below treatment levels by the predator, <i>Typhlodromus occidentalis</i> Nesbitt, except for the apple rust mite, <i>Aculus schlechtendali</i> (Nalepa) which required chemical control
The first record of Culiseta silvestris minnesotae Barr in British Columbia (Diptera: Culicidae)
No full textParasites of the larch casebearer, Coleophora laricella (Lepidoptera: Coleophoridae), in the West Kootenay area, British Columbia
Get PDFThe parasite complex of the larch casebearer, <i>Coleophora laricella</i> (Hbn.), was investigated in the Kootenay area of British Columbia in 1973 and 1974. Forty-one species of hymenopterous parasites were obtained from rearings of almost 153,000 final-instar host larvae and pupae. In 1973 and 1974, 31 and 24 species, respectively, were reared, with 14 common to both years. Twenty-nine of these, in 24 genera, were confirmed as larch casebearer parasites by individual rearings and by reports in the literature. No parasites were obtained from eggs, needle-mining larvae, or third-instar case-bearing larvae. The highest total percentage parasitism was 17.7% in 1973 and 24.5% in 1974, both at Rossland. In Collection II the <i>Dicladocerus</i> spp. complex comprised 46.0% of the total parasitism in 1973. and 63.8% of the total in 1974: it was the most abundant at four of the eight collecting sites in 1973 and 13 of the 14 sites in 1974. <i>Spilochalcis albifroms</i> (Walsh) comprised 32.8% and 23.5% of the total parasitism in the years 1973 and 1974 respectively; it was most abundant at three collection sites in 1973 and at two in 1974. <i>Mesopolobus</i> sp. constituted 4.9% of the total in 1973 and 9.9% in 1974. Larch case bearer densities in the first collection in 1973 were highest at Fruitvale and Shoreacres with 150 and 130 cases per 100 fascicles respectively; in 1974, the highest host densities in the first collection were at Kootenay Bay and Fruitvale with 48 and 41 cases per 100 fascicles respectively