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adult Africa applied areas attack banana began biological control boll weevil Brazil breeding sites brown planthopper cassava mealybug caused Central America chemicals coconut palms costs cotton developing countries dieldrin disease dry season ecology economic damage threshold economic thresholds effective eggs entomologists environmental example farmers farms feed field fronds green mite growers growth hectares Ibadan IITA increased insect insect pests insecticides Integrated Control International IPM program IPM system IRRI IRRI scientists islands Kenmore kill Kogan larvae leaf levels lopezi major mealybug mealybug and green methyl parathion million monitoring moth natural enemies Nicaragua Nigeria organochlorines organophosphates outbreaks Parana pest control pest damage pest populations pest problems pesticides Philippines plant plantations plots predators production pyrethroids release resistance rhinoceros beetle soybean species spraying stink bug Swezey Table throughout toxic trap crops Tropical Agriculture Turnipseed United Fruit varieties velvetbean caterpillar virus wasp yield Zelazny Zone