角轮刺猎蝽生物学特性的研究

Studies on Biology of Scipinia subula Hsiao et Ren

角轮刺猎蝽Scipinia subula Hsiao et Ren为茶园捕食性天敌,在室内研究了温度、猎物对它发育历期的影响,并观察该猎蝽的产卵动态。结果表明,以茶蚜Toxoptera aurantii Boyer为猎物时,角轮刺猎蝽在4个温度梯度(20、25、30、35℃)下的发育历期随温度升高而变短,卵期为6.5～34.1d,整个若虫发育历期为26.9～72.0d。卵孵化率在各温度下无明显差异,整个若虫期在25和30℃下的死亡率明显低于20和35℃。取食茶蚜与小菜蛾Plutella xylostella(L.)对该蝽发育历期无显著影响。在30℃下以小菜蛾为猎物时,该蝽平均产卵214.1粒.雌-1,产卵前期平均为8.0d,产卵期平均为46.1d。

Scipinia subula Hsiao et Ren is a predatory insect in tea plantation ecosystems. The effect of temperature and prey species on the development of S. subula as well as its oviposition was observed in laboratory experiments. The results revealed that, by feeding on Toxoptera aurantii Boyer as a prey, the development rate of S. subula increased with temperature at 4 tested temperature （20, 25, 30 and 35℃ ）. The embryonic developmental periods ranged from 34.1 d al 20℃ to 6.5 d at 35℃. The entire nymphal developmental period reduced from 72.0 d at 20℃ to 26.9 dm35℃. There is no significant difference in S. subula hatchability at the 4 tested temperatures during embryonic development, but significantly different mortality during nymphal development with lower mortality at 25℃ and 30℃ than at 20℃ and 35℃. No significant difference of developmental periods was observed between S. subula feeding on T. aurantii and Plutella xylostella （L.） as preys. With P. xylostella as a prey at 35℃, the fecundity of S. subula was 214.1 female eggs with pre-oviposition period of mean 8.0 d and oviposition period of mean 46.1 d, respectively.