Abstract
The life span of Brachymeria lasus (WALKER) adults fed on 10% sugar solution was longer than those fed on 1% sugar solution and distilled water. Although no mature eggs were found in the ovaries of newly-emerged females, the mean number of mature eggs per female increased with age until 7 days after emergence with a maximum of 8 mature eggs. The mean preoviposition period was 4.7 days. The mean number of progeny per day produced decreased by a single female fed on 10% sugar solution was about 6 or 5 weeks after emergence and decreased subsequently. The sex ratio of progeny was male biased and changed with age. No female progeny were observed at 13 weeks after emergence. The net reproductive rate and intrinsic rate of natural increase were 118.1 and 0.102, respectively, when females were fed on 10% sugar solution.
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