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研究了吉林省公主岭地区甜玉米上亚洲玉米螟Ostrinia furnacalis(Guene)的发生危害和防治措施。田间抗螟性人工接虫鉴定结果表明,甜玉米710A和普通玉米自交系丹340的食叶级别为9级,即高感玉米螟,而单交种邢抗5号和邢抗2号的食叶级别为5级,为中抗型。与普通感虫和中等抗虫性玉米品种相比,取食甜玉米的玉米螟幼虫存活率高3～7倍,发育速度更快,提前约4～8天(1～2个龄期),说明甜玉米比普通玉米感虫。甜玉米比普通玉米及早播比晚播田更吸引玉米螟产卵。田间小区试验表明,化学杀虫剂的防治效果比白僵菌和苏云金杆菌的好,以氯菊酯喷雾防治效果最好,虫孔减退率达90％;其次是杀螟灵颗粒剂、Bt喷雾和Bt颗粒剂;而白僵菌的防治效果较差,喷雾防治效果好于颗粒剂。大田防治效果与小区试验基本相同。同时还分析了氯菊酯防治甜玉米玉米螟的防治策略、防治时期、施用次数等。此外,对Bt制剂作为化学杀虫剂的取代品及与其它生物防治方法协调使用的优点与潜力进行了讨论。
The occurrence and control of Ostrinia furnacalis (Guene) on sweet corn in Gongzhuling area of Jilin Province were studied. The results of field test showed that the leaf grade of sweet corn 710A and common maize inbred line Dan 340 was 9, that is, the susceptible corn borer, whereas the single crosses Xingkang 5 and Xingkang 2 Leaf level of 5, for the resistance type. Compared with common and insecticidal susceptible maize varieties, the survival rate of corn borer larvae fed sweet corn was 3 ~ 7 times higher than that of normal insects, and the growth rate was faster, about 4 ~ 8 days earlier (1 ~ 2 instars) Explain sweet corn than common corn flu insects. The sweet corn is more attractive to the corn borer to lay eggs than the normal corn and the earlier sowing than late sowing. Field experiments showed that the control effect of chemical insecticides was better than that of Beauveria bassiana and Bacillus thuringiensis, and the permethrin spraying was the best, with the rate of worm hole reduction reaching 90%. The second was BAC spray And Bt granules; Beauveria bassiana control effect is poor, spray prevention and control effect is better than granules. Field control effect and cell test is basically the same. At the same time, we also analyzed the control strategy, control period and application frequency of permethrin against sweet corn borer. In addition, the benefits and potential of Bt formulations as alternatives to chemical insecticides and in coordination with other methods of biological control are discussed.