Abstract: 【Aim】To observe the ovarian developmental progress and formulate ovarian developmental grading criteria of Conopomorpha sinensis, explore the influence of mating on the ovarian developmental progress and fecundity. 【Methods】 The newly eclosed female and male adults of C. sinensis were paired in a 1∶1 ratio and reared. The female ovaries were dissected daily, and the mating experience was judged according to the characteristics of the bursa copulatrix. The characteristics of fat body, length of ovarioles, total number of egg chambers and number of mature eggs of mated and unmated females were recorded for grading the ovarian development progress. The newly eclosed female and male adults paired in a 1∶1 ratio, and newly eclosed female adults that were individually reared were used as the mated group and unmated group, respectively, and the pre-oviposition period, oviposition period, number of eggs laid per female and female adult longevity were counted in the two groups.【Results】 The ovarian development of C. sinensis could be divided into five stages, including yolk deposition prophase (stage Ⅰ), yolk deposition phase (stage Ⅱ), egg maturation phase (stage Ⅲ), peak phase of oviposition (stage Ⅳ) and terminal phase of oviposition (stage Ⅴ). Only the ovaries of the mated female adults could completely develop. Otherwise, the ovaries of the unmated female adults only developed into the yolk deposition phase (stage Ⅱ). The preoviposition period, oviposition period, number of eggs laid per female and female adult longevity in the mated group were 3.82 d, 11.23 d, 176.42 grains and 16.35 d, respectively. The female adults in the unmated group could not lay eggs for life, and the female adult longevity in the unmated group was 20.48 d. 【Conclusion】 The ovarian development of C. sinensis adults can be divided into five stages. However, mating is a prerequisite for the completion of ovarian development of the female adult. The ovarian development of the unmated female adults terminates after reaching stage Ⅱ. The fecundity of the mated female adults is significantly higher than that of the unmated females, and the unmated females can not lay any eggs for life.

Key words: Conopomorpha sinensis; mating, ovary, developmental progress, fecundity