棉铃虫齿唇姬蜂的饲养及生物学特性

Mass-Rearing and Bionomics of Campoletis chlorideae

对棉铃虫齿唇姬蜂室内饲养及相关生物学特性的研究结果表明 :可用斜纹夜蛾幼虫作为该蜂室内人工繁殖的最适宜寄主。当该蜂寄生不同日龄的斜纹夜蛾幼虫时 ,其发育历期无显著差异 ;寄生率随寄主日龄的增加而降低 ;茧重随日龄的增加而增重 ;成虫羽化率无明显差异 ;获茧率以 4日龄寄主最高 ,为 55 3% ;以 3～ 5日龄寄主幼虫繁育的成蜂寿命最长。齿唇姬蜂在 2 6℃下的平均产卵量为 92 7粒 ,成蜂绝大部分在光照期羽化。在 4～ 2 6℃范围内 ,温度愈低 ,成蜂寿命愈长。

Mass-rearing and bionomics of Campoletis chlorideae were studied under laboratory conditions at 26±1℃ and 65±5% RH. The results indicated that among the five tested heliopteran species, i.e., Helicoverpa armigera, H. assulta, Spodoptera litura, S. exigua and Mythimna separata, S. litura was the most feasible host for the rearing of C. chlorideae. When S. litura larvae at different developmental stages (2-6d old) were used as the host of C. chlorideae, the developmental period of the wasp did not differ significantly. With the increase of the host′s age, the parasitizing ratio of the wasp decreased, the weight of the cocoon increased, whereas the emerging ratio of the adults did not differ (around 90%). Four-day-old host could produce the largest number of cocoon (55.3%). The longevity of the adult wasp developed from 3-5-day-old S. litura larvae was the longest among the treatments. Under 26℃, the averaged number of eggs per wasp was 92.7 and most wasps emerged in the daytime. Under temperature range of 4-26℃ and supplied with 10% honey solution, the average longevity of adult wasp increased with the decrease of temperature.