Author:
Li Xian,Shen Shunzhang,Fu Yueguan,Chen Junyu,Li Lei,Han Dongyin,Zhu Junhong,Zhang Fangping
Abstract
AbstractCoccophagus japonicusCompere, an endoparasitoid ofParasaissetia nigraNietner, has great potential for biological control. To assess the influence of mating on the reproductive performance of this parasitoid, we examined the effects of mating on ovarian development, female longevity and number of eggs laid. The results showed that the egg volume in the ovary ofC. japonicus first increased and then decreased with increases in the age of female adults. The peak egg volume in the ovary of mated females occurred 2 days earlier than that of virgin females. Within the female age range of 0–15 days, the numbers of eggs at stages I, II, and III first increased and then decreased with increases in the age of femaleC. japonicus, whereas the number of eggs at stage IV increased. The duration of the coexistence of females and males significantly influenced the length and width of the female ovaries, and the longest ovary tube and the highest number of eggs were obtained with a coexistence duration of 0 days.C. japonicusfemale longevity decreased with increases in the number of matings, and the number of eggs laid by females within 15 days decreased with increasing delays in mating. In conclusion, mating can shorten the longevity ofC. japonicusfemales, and selecting newly emerged virgin females for mating can significantly improve the number of eggs laid and the breeding efficiency of the parasitoid.
Funder
Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences
China Agriculture Research System
Publisher
Springer Science and Business Media LLC
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