Morphological Characteristics of Female Reproductive System and Ovarian Gradation of Tirathaba rufivena Walker
Tirathaba rufivena Walker is one of the important insect pests of palm plants.Predicting its occur-rence period to infer the appropriate control period is key to the effective control of this pest.The morphologi-cal characteristics of female reproductive system and ovarian development gradation were studied in this study,which would provide the theoretical foundation for biology research and occurrence prediction of T.rufivena.Results showed that the structure of female reproductive organs is similar to that of other lepidopteran insects.The external reproductive organs were comprised of the ovipositor,seminal ducts,bursa copulatrix and associ-ated parts.The internal reproductive organs were comprised of a pair of ovaries,two lateral oviducts,one common oviduct,spermatheca,accessory gland and genital chamber.The ovarian development process was di-vided into five grades,including transparent stage(level Ⅰ),vitellogenesis stage(level Ⅱ),the egg maturation stage(level Ⅲ),the egg-laying stage(level Ⅳ)and the late egg-laying stage(level V).The amount of laid egg was significantly increased in 3-day-old female adults,which the ovary generally process to the level Ⅳ,and reached egg-laying period.The peak of egg-laying was at 4 days of age with 42 eggs per day per head.This study clarified the morphological characteristics of female reproductive system,and constructed the stand-ard of ovarian development gradation of T.rufivena.
万方数据
维普
