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Walnut aphid management: aphid effects on walnut production and quality



Walnut aphid management: aphid effects on walnut production and quality



California Agriculture 25(5): 12-13



In a 2-year trial with Payne walnuts to assess the beneficial effects of controlling aphids by insecticides, aphid infestations of untreated control trees resulted in crop losses of 10 and 26% in the first and second year, respectively, and a 25% reduction in the numbers of large, sound nuts compared with treated trees. The numbers of off-grade nuts were also increased by 10% and diamond kernel nuts were reduced by 11.5%. The economic advantages resulting from aphid control are noted.

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