Abstract: The potential impact of sublethal doses（LC₁₀） abamectin and carbosulfan on the survival rate of adult females and males of Bactrocera minax （Enderlein）, the ovarian development of adult females, the abdominal index, ovarian index, egg length of 42 days old living females were studied with the rearing methods and the anatomical methods. The results showed that the average survival rate of adult females treated with LC₁₀ abamectin and with LC₁₀ carbosulfan was highly significantly lower than that of adult males by 5.00 percent and 5.30 percent, respectively. Compared with the untreated group （CK）, the average survival rate of adult females and males treated with LC₁₀ abamectin and LC₁₀ carbosulfan were highly significantly reduced by 12.52 percent and 14.16 percent, 8.06 percent and 9.40 percent, respectively. The average survival rate of adult females and males treated with LC₁₀ abamectin was highly significantly lower than those treated with LC₁₀ carbosulfan. For all the three rearing treatments （normal rearing, LC₁₀ abamectin rearing, and LC₁₀ carbosulfan rearing）, the ovarian development of 42 days old living females reared after 36 days all reached Grade 4 or Grade 5. The proportion of Grade 4 and Grade 5 were 66.67% and 33.33% of those with normal rearing, 45.45% and 54.55% of those with LC₁₀ abamectin rearing, 92.86% and 7.14% of those with LC₁₀ carbosulfan, respectively, however, there was no significant difference among the abdominal index, among the ovarian index, and among the egg length. Sublethal doses of abamectin and carbosulfan reduced the survival rate of adults of Bactrocera minax, which stimulated and inhibited the sexual maturation of female adults of Bactrocera minax, respectively.

Key words: Bactrocera minax （Enderlein）, abamectin, carbosulfan, survival rate, sublethal dose