黑带食蚜蝇成虫室内的饲养方法

对黑带食蚜蝇成虫所需的饲养空间、光照及补充营养物初步进行了筛选 ,并探讨了蚜虫、寄主植物及补充营养物对其成虫产卵的影响。结果表明 ,在 3 0cm× 3 0cm× 3 0cm养虫笼内同时提供大麻、玉米和油菜 3种鲜花粉并辅以光照饲养效果最佳 ,平均每雌产卵量 468粒 ,最高达 70 1粒 ,孵化率88 4%,产卵前期 1 1 5d ,雌雄成虫寿命分别为 5 5 5和 5 6 8d。试验还表明 ,提供蚜虫及其寄主植物可使成虫正常产卵 ,带蚜的莲花白叶片作为其成虫产卵载体植物着卵量最高

Rearing method of the adults of Episyrphus balteaus in the laboratory

Room size,illumination and pollen diets on rearing the adults of Episyrphus balteaus De Geer was screened premilinarily in the laboratory. The influence of aphids and their host plants and pollen diets on the adult oviposition of E. balteaus was carried out.The results showed that using fresh flowers of maize,hemp and rape together as diets of E.balteatus in the lighting cage(30×30×30 cm) was better than using each of them separately;the average fecundity of E.balteatus was 468 eggs per female (max.701 eggs/female),with an egg|hatching rate of 88^4%;the pre|oviposition period was 11^5 days;the longevity of female and male adults was 55^5 and 56^8 days,respectively.The presence of aphids and their host plants was found to be necessary for normal oviposition of the adults and the tender leaves of cabbage with aphids was the best.