Abstract: Campoletis chlorideae Uchida in the Beijing and Tianjin areas has seven generations every year.Five of them occur in the cotton field.The parasitic proportion in the second and third generations of Heliothis armigera is the highest,being 33.3-66.7%,In the field there are three heights of parasitism separately.The first height is during the second and last ten days of June,the second-during the second and last ten days of July and the third-during the first and second ten days of August.The heights of parasitism coincide with the Key period when the Heliothis armigera harms the cotton.Temperature exerts tremendous influence on every metamorphosis period of Campoletis chlorideae Uchida.Low temperature can prolong the emergence period of cocoon and the life of imago.Campoletis chlorideae Uchida can mate and oviposit on the same day as it emerges.But the two or three days after its emergence are the vigorous period of oviposition.Female mates only once in its life,but male mates many times.One female can lay 7-9.4 eggs on the average,19-21 eggs at most,The amount of eggs is relative to the length of its life,its stadium and the density of its host,but it is little affected by temperature.They can oviposit regularly under the temperature of 20-27℃.The number of males and females in the nature is in a ratio of about 1:1.But this kind of insect has the characteristic of parthenogenesis so that the coming generation consists of males.Therefore,if they are inoculated indoors,the ratio of sex distinction of their coming generation is far different from 1: 1.Among their progenies generated through mating the females are more than the males.The larva of Plusia peponis(Fabricius)is the intermediate host of Campoletis chlorideae Uchida.Parasitic rate in it is higher than that in Heliothis armigera.It reaches 90 % in the first ten days of September.So Plusia peponis(Fabricius)is a good host for generating Campoletis chlorideae Uchida.
傅亿荣. 棉铃虫齿唇姬蜂生物学的研究[J]. 华北农学报, 1988, 3(3): 38-44. doi: 10.3321/j.issn:1000-7091.1988.03.007.
Fu Yirong. Research on the Biological Characteristic of Campoletis Chlorideae Uchida[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1988, 3(3): 38-44. doi: 10.3321/j.issn:1000-7091.1988.03.007.