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Concentration gradients of phosphate, K, Ca and Mg were measured near a plane of onion seedling roots at a range of soil water contents, in a special ...
Read moreA computer model was developed simulating the mating behaviour and population increase of adults of Spodoptera littoralis (Boisd.) in an isolated grou...
Read moreIn general, bees collecting nectar only, as well as bees collecting nectar and pollen, preferred male-fertile to male-sterile cultivars of onion plant...
Read moreUntil the late 1960s, Euterpe edulis was the most important edible palm species in the Brazilian markets. Since then, overharvesting of natural stands...
Read moreThe adult life-span and the factors affecting egg production in Pieris rapae (L.) (especially age, temperature and solar radiation) were investigated ...
Read moreCompetition between the 2 strains was studied in pot experiments. It was found that F1 Selma (FS) suppressed Early Hybrid (EH) in mixed culture, altho...
Read moreIn competition experiments the suppression of Early Hybrid by F1 Selma was not eliminated by increasing nutrient supply levels up to several times the...
Read moreBees foraging for nectar on flowers of cultivars with deep corolla tubes and large floral parts found it difficult to reach the inner nectaries. They ...
Read moreA model for the growth and development of cassava under pest-free conditions, as modified by weather, soil nitrogen and water, is described. The model...
Read moreLife tables for populations of Hylemya (Erioischia) brassicae (Bch.) on cabbage crops in Canada [cf. RAE/A 60, 538] and England [50, p. 286] are analy...
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