论文部分内容阅读
利用培养皿法和玻璃球法对棉叶 (幼嫩棉叶、虫伤棉叶 )和棉铃虫本身的物质源 (产出卵、剖腹卵、幼虫虫粪、雌蛾鳞片、雌蛾尾毛、雌蛾腹部末端、混合鳞片 )的提取液进行活性测定。结果表明 ,棉铃虫的雌蛾腹部鳞片的正己烷提取液及棉铃虫产出卵的水洗液对螟黄赤眼蜂和松毛虫赤眼蜂有较强的引诱和产卵刺激作用 ,其它物质的提取液效果不明显。轨迹法测定结果进一步表明 ,螟黄赤眼蜂在用棉铃虫卵水洗液和棉铃虫雌蛾腹部鳞片正己烷提取液处理的区域内有明显的刺探行为 ,并且滞留时间也明显比对照区长。米蛾卵寄生率法测定结果显示 ,棉铃虫雌蛾腹部鳞片正己烷提取液浓度为 1 .7mg/ml时 ,对螟黄赤眼蜂和松毛虫赤眼蜂的引诱作用均达到最强 ,寄生率分别为 82 .5%和 60 .9% ,而对照寄生率分别为 1 8.0 %和 2 8.3% ;提取液浓度过高或过低引诱作用都不明显。螟黄赤眼蜂对用蒸馏水洗过的新鲜棉铃虫卵和未洗过的虫卵在寄生率上差异极显著 ,前者的寄生率为 43.5% ,后者的寄生率仅为 1 3.3%。
The material sources (ovipositional eggs, larvae, larvae, females, tail hairs of female moths) of cotton leaves (young cotton leaves, insect-damaged cotton leaves) Female moth abdominal end, mixed scales) extracts were measured activity. The results showed that the n-hexane extract from the abdominal scales of H. armigera and the ovipositional washings of H. armigera had a strong attraction and spawning stimulating effect on Trichogramma ostriniae and Trichogramma ostriniae. Other materials Extract effect is not obvious. The results of trajectory analysis further showed that the Trichogramma ostriniae had obvious spitting behavior in the area treated with the Helicoverpa armigera egg water washing solution and the H. armigera belly scales n-hexane extract, and the retention time was significantly longer than that of the control area. The results showed that the lure of Trichogramma ostriniae and Trichogramma ostriniae was the strongest when the n-hexane extract of H. armigera was 1.7 mg / ml, The rates were 82.5% and 60.9%, respectively, while the control parasitics were 1 8.0% and 2 8.3%, respectively. The extractive concentration was too low or too low. Trichosanthes yellow Trichogramma had significant differences in the parasitism rates of fresh cotton bollworm eggs washed with distilled water and unwashed eggs, with the former having a parasitic rate of 43.5% and the latter having a parasitic rate of only 13.3%.