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In a study in an unsprayed cider-apple orchard in Bristol, England, on the importance of egg predation in the population dynamics of Cydia pomonella (...
Read moreLife tables and intrinsic rates of increase were obtained for Myzus persicae (Sulz.), Brachycaudus helichrysi (Kalt.) and Macrosiphoniella sanborni (G...
Read moreA simple model is proposed relating numbers of dispersing insects to distance from a release point and time. One form of the model, which is explained...
Read moreThere was a marked diurnal variation of light interception by hedgerow orchards on sunny days in June and July. This variation was considerably reduce...
Read morePatterns of light interception, in both time and space, were measured during 1973 and 1974 in apple orchards. Several planting systems were investigat...
Read moreLight transmittance and reflectance of sun and shade leaves of apple (cv. Golden Delicious) were measured from May to September over the 380-700 nm wa...
Read moreExtracts and leachates of the grass Aristida adscensionis inhibited the growth of Rhizobium in sterile culture. The results confirm previous studies o...
Read moreAchenes of Polygonum lapathifolium, P. pensylvanicum and P. persicaria are commonly eaten by cottontail rabbits in southern Ontario. Feeding experimen...
Read moreSitka spruce seedlings were grown in horticultural peat supplied with either large or small amounts of P and K. K decreased the transpiration rate per...
Read moreThe serpentine tailings from asbestos mines in southeastern Quebec cover 5.5 km2 and are largely devoid of vegetation. The tailings have a high pH, ve...
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