Journal of the Entomological Society of British Columbia
Not a member yet
1660 research outputs found
Sort by
Rates, methods and persistence of insecticides for preventing carrot maggot damag
No full textFourteen carbamate and organophosphorus insecticides for preventing damage by carrot maggot, <i>Psila rosae</i> (Fab.), were applied as granules in the seed furrow at 2 locations in muck soil, and supplemented with 2, 3, 4, or 8 sprays of the same materials during the season. The spray applications were made at 40 and 70 days after seeding; 30, 50, and 70 days; 30, 50, 70, and 90 days; 40,70, and 100 days. Diazinon, the currently recommended treatment, was applied 8 times at lO-day intervals from 30 to 1OO days. All the granules except chlorfenvinfos and ethion reduced the number of emergent seedlings. The reduction was 40% in plots treated with diazinon, thionazin, Chemagro 7375, Nemacur, pirimiphos-methyl, and TD-8550. Maggot damage was negligible until 100 days after seeding, but by 160 days only plots treated with carbofuran, fensulfothion, ethion and 3 of the numhered compounds had less than 20% damage. Residues of pesticides in the carrots ranged from 0.12 ppm of ethion 30 days after the final application, to 1.28 ppm of thionazin 10 days after. Residues in carrots held in storage at 5∞C for 30, 60, and 90 days, increased with the period of storage, except those from plots treated with chlorfenvinphos
Innervation of the stylets of the pear psylla, Psylla pyricola (Homoptera: Psyllidae), and the greenhouse whitefly, Trialeurodes vaporariorium (Homoptera: Aleyrodidae)
No full textThe fine structure of the stylets of the pear psylla, <i>Psylla pyricola</i> Foerster, and the greenhouse whitefly, <i>Trialeurodes vaporariorum</i> (Westwood), is described from sections studied in the electron microscope. Their mandibular stylets are innervated, each containing two dendrites
Biological notes on a green fruitworm, Lithophane Georgii Grt. (Lepidoptera: Noctuidae), attacking apples in the Okanagan Valley of British Columbia
No full textFor the past 3 seasons, a green fruitworm, <i>Lithophane georgii</i> Grt., has injured apples in the Okanagan Valley of British Columbia. Larvae feed on leaves, will attack fruit early in the season causing deep russeted pits similar to those caused by the fruit-tree leafroller, <i>Archips argyrospilus</i> (Walker). Larvae were active from late April to early June. Pupation took place in the soil, and adults emerged in October. The insect apparently overwinters as an adult and deposits eggs early in the spring, although eggs of this species have not been found in the field. Although larvae of <i>L. georgii</i> are capable of injuring apples, observations in 1970 and 1971 indicate the numbers are so low that the species cannot be considered a major pest
An evaluation of traps for the western cherry fruit fly (Diptera: Tephritidae)
No full textFour traps and six lures were tested for attractiveness to adult western cherry fruit flies , <i>Rhagoletis indifferens</i> Curran, in cherry plantings in the Okanagan Valley of British Columbia. Staley Protien Insecticide Bait #7 , a combination of corn protein hydrolysate and corn steep liquor, mixed into tanglefoot (Stikem Special) on double-faced, yellow, plywood boards attracted about twice as many flies as similar traps baited with corn hydrolysate and three times as many as single-faced, nonbaited boards. Nevertheless, nonbaited, single-faced, yellow boards were moderately attractive and the easiest to prepare, install and maintain. Thus they seem the most practical for large-scale trapping of cherry fruit flies. Traps caught male and female flies soon after emergence from pupation in a ratio of about 1:1. Most female flies lacked ovarial development and none had fully developed ova
Observations on Arctia caja americana Hair (Lepidoptera: Arctiidae) on tansy ragwort, Senecio jacobaea L.
Get PDFThis is the first record of <i>Arctia caja americana</i> Hair on tansy ragwort, in British Columbia. The development of the insect on the weed, its polyphagous habits and its potential as an experimental animal are reported and discussed
Mites and insects collected from vineyards in the Okanagan and Similkameen valleys, British Columbia
Get PDFFive species of mites and 122 species of insects were collected from leaves, stickyboards and beating trays in 14 vineyards in 5 different areas in southern British Columbia between May and October 1972. Two mite species and 5 insect species are potential economic pests in British Columbia but only one insect species, the Virginiacreeper leafhopper, <i>Erythroneura ziezae</i> Walsh requires control measures
The European fruit lecanium, Lecanium tiliae (L.) (Homoptera: Coccidae), in southwestern British Columbia
Get PDF<i>Lecanium tiliae</i> normally has one annual generation in southwestern British Columbia. There was a partial second in a year following a mild winter. The heaviest infestations were on horse chestnut, Japanese plum, hawthorn, and maple, in that order. Hawthorn was damaged. The proportion of males tended to be higher in high than in low populations, and to decrease with increasing altitude. Severe winter cold caused marked population decreases and cold weather in June noticeable decreases. Natural enemies found in 1969-72 are listed
Notes on the Painted Lady, Vanessa cardui L. on Vancouver and the Queen Charlotte Islands in 1952
No full textn/
Chemical Control of the Pear Blister Mite, Eriophyes pyri (Pgst.), in British Columbia
No full textn/
Insect Population Sampling: General Considerations
No full textThis paper has two sections: General Considerations – written by both authors; and Forest Defoliators – written by R.W. Stark. Each has its own references