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1. Efficacy of three natural substances against apple aphid (Aphis pomi De Geer, Aphididae, Homoptera) under laboratory conditions Žiga Laznik, Vlasta Cunja, Milica Kač, Stanislav Trdan, 2011, original scientific article Keywords: cinnamic acids, symphytum, insecticides, Aphis pomi, pesticidal properties, mortality |