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Behaviour of Verticillium lecanii (Zimm.) Viegas, a pathogen of the aphid Toxoptera citricidus (Kirk.) in citrus plantations in Venezuela



Behaviour of Verticillium lecanii (Zimm.) Viegas, a pathogen of the aphid Toxoptera citricidus (Kirk.) in citrus plantations in Venezuela



Agronoma Tropical 30(1/6): 201-212



Toxoptera citricida (Kirk.) was first found in Venezuela in 1976 on citrus in Maracaibo; by 1978, the aphid had spread to Carabobo and Yarcuy, both of which are important citrus-growing regions. Details are given of studies on the population dynamics of the aphid in an orange grove in each of those states. Five population peaks were detected in the course of the year. In both groves, the aphid was found to be infected with the fungus Verticillium lecanii.

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