BIOLOGY OF THE LEAF MINER OF THE CHRYSANTHEMUM Liriomyza trifolii (Burgess)
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Studies on the biology of the chrysanthemum leaf miner Liriomyza trifolii (Burgess) showed that oviposition occurs under the epidermis of the upper surface of the leaves and that hatching takes place 6-10 days later. The larval stage has three instars that can be differentiated by the size of the mouth hooks; the larvae complete their development in 14-31 days; the prepupa lasts 5-8 hours and the pupa, 15-18 days. Female longevity has an average of 11 days and the males, 5 days. Females mate with different males since the day of emergence. A single female can lay an average of 78 viable eggs. Oviposition starts two days after adult emergence showing a peak of viable eggs laid on the fifth day. Between days 5 to 10, the females deposit 74% of the total viable eggs.
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