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When available data were re-examined with regard to the part played by wild hosts in the infection cycle of CSSV in cacao, Cola chlamydantha could not...
Read moreWater availability was the most important limiting factor to tea growth. Monthly averages of tea yields for estates were correlated with soil water in...
Read moreThe effects of competition between ecologically contrasting populations from acid and calcareous soils were investigated in a pot experiment. The effe...
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Read moreThe area, subjected to pressure by pedestrians and vehicles, was divided into 3 zones according to the intensity of wear. Significant differences in t...
Read moreThe following is based largely on the author's summary. A study was made in eastern England in 1969-70 on aphidophagous Syrphids and Syrphid predation...
Read moreThe following is based largely on the authors' summary. The ecology of Aphis craccivora Koch and subterranean-clover stunt virus [cf. RAE A 58 646] wa...
Read moreFields in southern England were sampled over seven years to assess populations of eggs and larvae of Hylemya (Leptohylemyia) coarctata (Fall.) and of ...
Read moreThe following is based partly on the author's summary. Cattle egrets (Ardeola ibis) feeding in dairy-cattle pastures in the south-western Cape Provinc...
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