oa Journal of the Entomological Society of Southern Africa - Further notes on leaf roll spread potato aphids and in South Africa



In a former publication (Daiber, 1962) a report was given on aphid populations on potatoes, winged dispersal of potato aphids, and on the leaf roll spread at Rietvlei Experiment Station. Though Macrosiphum euphorbiae (Thomas) (= solanifolii Ashmead) was more abundant than Myzus persicae (Sulzer), the latter is regarded as more important for the spread of the leaf roll virus (Smith and Brierley, 1956). In our experiments leaf roll spread early in the season was more important than later in the season, and spread within the crop by unwinged M. persicae was more important than spread into the crop by winged forms.


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