Effects of different nutrient solutions on the reproduction and longevity of Spodoptera frugiperda (Lepidoptera: Noctuidae)
Author of the article:ZHANG Jun-Yi, TIAN Cai-Hong, FU Jun-Feng, LIU Xiao-Guang, LI Guo-Ping, HUANG Jian-Rong, WANG Gen-Son
Author's Workplace：College of Plant Protection, Henan International Laboratory for Green Pest Control, Henan Agricultural University, Zhengzhou 450002, China; Biological Pesticides Engineering Research Center of Henan Province, International Joint Research Laboratory for Crop Protection of Henan, Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Henan Key Laboratory of Crop Pest Control, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
Key Words：Spodoptera frugiperda; nutrient solutions; fecundity; longevity; ovarian development
Abstract：
[Objectives] To determine the effects of different nutrient solutions on the reproduction, life span and ovarian development of adult Spodoptera frugiperda. [Methods] Four different nutrient solutions were provided to captive raised adult S. frugiperda and the effects of each of these on reproduction, life span and ovarian development were compared. [Results] Two nutrient solutions significantly improved the reproduction and longevity. Adults provided with solution I had significantly higher egg production, hatching rate, weight per hundred eggs, female longevity, male longevity and egg laying period than the control [(1 370.2±269.5), (99.1%±0.9%), (8.2±1.7)mg, (13.4±2.3)d, (12.4 ±2.4)d and (6.8±1.7)d, respectively). The same parameters of adults that were provided with solution Ⅱ were (1 163.7±304.7), (98.2% ± 2.1%), (7.4 ± 1.0)mg, (11.9± 2.1)d, (10.4±1.8)d, (6.1± 1.7)d respectively. Of these, only egg production, hatching rate, weight per hundred eggs, preoviposition period, female longevity and oviposition period, were significantly higher than those of the control. Furthermore, adults fed on either solution I or solution Ⅱ also differed significantly in the amount of eggs laid, weight per hundred eggs, female and male longevity. There was, however, no significant difference in ovarian development between females fed different nutrient solutions. All 4 nutrient solutions significantly increased the size of the fat body attached to the abdominal cavity and ovary. The fat body weights of adults fed either solution I, solution II, 5 % sucrose water or 10 % honey water, were (17.9 ± 0.4) mg, (16.3 ± 1.1) mg, (17.1 ± 0.5) mg and (17.0 ± 0.6) mg, respectively, all of which were significantly higher than the fat body weights of adults that were provided with sterilized distilled water [(11.4±1.2)mg]. [Conclusion] Nutrient solution I, the main components of which were brown sugar, rice wine and vinegar, significantly improved the fecundity and longevity of captive S. frugiperda adults, and increased the size of the ovarian fat body. This solution is a suitable nutritional supplement for captive S. frugiperda adults.