1982•Universiti Putra Malaysia Institutional Repository (Universiti Putra Malaysia)Open access
Laboratory studies of the effects of selected tropical fruits on the larvae of Dacus dorsalis, Hendel
Abdul Ghani Ibrahim, Mohd Dzur Abdul Rahman
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Abstract
A laboratory study (27° C-30° C) on the suitability of tropical fruits for the larval development shows that it is in the order of : Papaya> carambola > banana> mango = water-melon> jackfruit > citrus> pineapple. In a suitable host i.e. papaya, the weight of the pupa was 11.6 g and life-cycle was 20.4 days. In the least suitable host i.e. pineapple, the weight of pupa was 4.9 g and life-cycle was 17.4 days. With papaya as food, the life-cycle of D. dorsalis depended on the density of the larvae within the food. A density of 10 larvae in 20 g of food had a life-cycle of21.7 days, whereas a density of50 larvae in the same quantity of food had a life-cycle of 15.1 days. The percentage of adult emergence decreased with increase in the larval density.
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