Molting and Longevity of Oncometopia Nigricans (Homoptera: Cicadellidae), A Suspected Vector of Lethal Yellowing of Coconut Palms, on Various Host Plants
Abstract
Coconut and Veitchia palms along with periwinkle, lettuce, false aralia, ixora, hibiscus, and lantana were tested to determine the relationship of these locally grown plants to the biology of Oncometopia nigricans (Walker), a possible vector of lethal yellowing in coconut palms. Although the mortality of O. nigricans is generally high on coconut and Veitchia palms, some individuals can live 3 or more months on these 2 palms. This insect undergoes 5 molts and can complete its life cycle on coconut palm, ixora, periwinkle, lantana, and lettuce. The average duration of nymphal stages varies with different test plants, but was 54 days on leaf lettuce and 44 days on head lettuce. Lettuce plants are ideal for rearing O. nigricans colonies in the laboratory.Downloads
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