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玉米螟Ostrinia furnacalis是辽宁省玉米的重要害虫,第二代玉米螟危害尤为严重。2006～2007年调查第二代玉米螟对不同玉米品种的危害情况。结果表明,辽单565受害较轻,而辽单526则受害严重。与此同时,对两品种植株与花丝的化学成分进行分析,辽单565的可溶性总糖含量明显低于辽单526,粗纤维高于辽单526,证明辽单526易感第二代玉米螟。利用辽单565密植和辽单526稀植2比空栽培形式进行两品种间作,可降低第二代玉米螟发生量,比未防治区增产538.5 kg/hm2,比清种辽单565增产257.6 kg/hm2。当第二代玉米螟发生达到防治指标时,只需对比空栽培的辽单526的穗部施药即可防止第二代玉米螟的危害,试验结果证明,该方法简单有效且有可操作性。
Corn borer Ostrinia furnacalis is an important pest of corn in Liaoning Province. The second generation of corn borer is particularly harmful. 2006-2007 Investigation of the Second Generation Corn Borer Damage to Different Corn Varieties. The results show that Liao Dian 565 suffered less damage, while Liao Dian 526 suffered serious injuries. At the same time, the chemical constituents of two varieties of plants and filaments were analyzed. The total soluble sugar content of Liaodong 565 was significantly lower than that of Liaodong 526 and the crude fiber was higher than that of Liaodian 526. . Intercropping with two varieties of Liao Dan 565 and Liao Shan 526 thinning and 2-empty culture could reduce the second generation corn borer, yield 538.5 kg / hm2 more than that of non-control area and increase 257.6 kg / hm2. When the second generation corn borer reaches the control index, the second generation corn borer can be prevented from being harmed by spike application of the cultivated Liaodian 526 only. The experimental results show that the method is simple and effective and feasible .