Some aspects of insecticidal and biological control of the woolly apple aphid, Eriosoma lanigerum (Hsm.) in Rhodesia.
D000818:Animals; D003634:DDT / Q000633:toxicity*; D007300:Insect Control; D007306:Insecticides / Q000633:toxicity*; D015030:Zimbabwe
D007306:Insecticides; D003634:DDT