播种行旋耕播种对玉米二点委夜蛾的控制效果

Control Effect of Rotary Tillage Sowing to Maize Athetis lepigone

二点委夜蛾在玉米上的发生和为害与小麦秸秆还田的田间生态密切相关，其幼虫隐蔽在小麦秸秆下为害玉米幼苗的茎基部和根部。二点委夜蛾生存和为害离不开秸秆覆盖的隐蔽环境。为了探索二点委夜蛾的绿色防治措施，采用对比试验设计，以传统常规播种机播种为对照，分析了播种行旋耕播种对二点委夜蛾的控制效果。结果表明：采用传统常规玉米播种机播种，开沟宽度为5~10 cm，播种行仍有麦秸覆盖，有利于二点委夜蛾在麦秸下隐蔽为害玉米幼苗，玉米平均百株虫量10.5头，被害株率6%；而采用播种行旋耕播种，将带有麦秸的播种行进行旋耕，然后再播种玉米，可使玉米播种行15~20 cm范围内没有麦秸覆盖，玉米出苗后不被麦秸围棵，破坏了二点委夜蛾的适生环境，可有效减轻二点委夜蛾的为害，在播种沟内未发现二点委夜蛾和玉米被害株。采用播种行旋耕播种对二点委夜蛾具有很好的控制效果。

The occurrence and damage of A thetis lepigone in maize are closely related to the field ecology of wheat straw returning to field,the larvae are hidden under the wheat straw and damage the stems and roots of maize seedlings. The survival and harm of A. lepigone can not be separated from hidden environment covered by straw. In order to explore the green prevention measures for A. lepigone,the control effect of rotary tillage sowing and traditional sowing to maize A. lepigone were analyzed design by contrast experiment. The results showed that sowing by conventional sowing machine,the furrow width was 5-10 cm,and the sowing row covered with wheat straw,it was convenient for survival and harm of A. lepigone,the insect amount of 100 maize strain was 10.5,and the rate of damaged was 6%. But there was no straw mulching around 15-20 cm of sowing row by rotary tillage sowing,and it destroyed the environment for the growth of A. lepigone,then could effectively reduce the harm to maize,A. lepigone and damaged strain were not found in sowing row. Therefore,the control effect of rotary tillage sowing to maize A. lepigone was beter.