Effects of Supplemental Nutrition on the Survival and Reproduction of Spodoptera frugiperda (Smith)

doi:10.16409/j.cnki.2095-039x.2021.05.009

Abstract

Abstract: Spodoptera frugiperda (Smith) is a long-distance migratory pest and feeds during the adult stage. However, the role of adult feeding of water and sugar in mating and reproduction is not clear. In this study, the effects of adult feeding on the survival, ovarian development, and reproduction of S. frugiperda were investigated by means of ovarian anatomy and behavioral observation. It was found that, without feeding, the moths had a short survival (about 3 days), immature ovaries (below grade 2), low mating rate (22.00%), very few oviposition (5.8 eggs), and nearly no hatched eggs (3.0%). However, the moths fed with water and sugar had longer survival (6—8 days), more mature ovaries (3.4—3.6 grades), higher mating rate (61.1%—66.7%), larger number of oviposition (436—1281 eggs), and higher rate of hatched eggs (more than 95%). Feeding had no significant effect on the mating number of mated females (1.1—1.7 times) and the mating rate of immature females (18.2%—22.9%). The longevity (8.06 days) and fecundity (1281 eggs) of female moths fed with sugar solution were significantly higher than those fed with pure water (6.57 days and 436 eggs, respectively), while there were no significant differences in survival time of male moths, ovarian development grade, mating rate and egg hatching rate between the two groups. Our results show that water is the necessary supplement for the survival and reproduction of S. frugiperda, and sugar only increases the fecundity of female moth. These results provide a basis for the accurate monitoring and effective control of S. frugiperda.

Key words: Spodoptera frugiperda, monitoring, oviposition, ovarian development

CLC Number:

S476

FENG Bo, ZHU Xiaoming, ZHONG Ling, WANG Xi, LIANG Shuping, LIU Wancai, GUO Qianshuang, DU Yongjun. Effects of Supplemental Nutrition on the Survival and Reproduction of Spodoptera frugiperda (Smith)[J]. Chinese Journal of Biological Control, 2021, 37(6): 1172-1178.

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