Evaluation of insecticides against pests of red ginger in Hawaii.
Insecticides effective against pests of red ginger (Alpinia purpurata) were identified in field trials in Hawaii in 1986 and 1990. Disulfoton 15G and foliar applications of chlorpyrifos DF significantly reduced infestations of Technomyrmex albipes, Pentalonia nigronervosa and Planococcus citri, Pseudococcus affinis and P. longispinus. Foliar applications of acephate 75 SP, fluvalinate 2 F and cyfluthrin 2 EC significantly reduced infestations of Aphis gossypii and Coccus viridis. As an insecticide barrier treatment, chlorpyrifos 20 MEC totally eliminated formicids and pseudococcids, although it did not control aphids.