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The citrus blackfly,Aleurocanthus woglumi Ash., was first observed in El Salvador in 1965. Its dispersal was followed during a three-year period (1969–1972) in which it infested most citrus orchards in the country. Indigenous natural enemies as the predatorsDelphastus sp. andChrysopa sp., and the pathogenic fungusAschersonia aleyrodis Web. are unable to… (More)