论文部分内容阅读
近年来,随着复种指数的提高和异常气候的影响,粘虫、玉米螟、玉米蚜、玉米穗虫等四大虫害对玉米的危害日趋严重,若防治不及时,轻则可使玉米减产8.93～10.74%,重则高达25.75～38.56%。因此,必须备足药械,及早防治,为玉米创造良好的生育环境。一、粘虫麦田套种玉米主要受2、3代粘虫为害。2代幼虫的危害尤为严重,其为害盛期多在5月下旬至6月上旬。此时小麦叶片逐渐干枯,2
In recent years, with the improvement of multiple cropping index and the impact of abnormal climate, the four pests such as armyworm, corn borer, corn aphid and corn earworm are more and more damaging to corn. If the control is not timely, the yield will decrease 8.93 ~ 10.74%, while as heavy as 25.75 ~ 38.56%. Therefore, we must prepare enough medicine, early prevention and control, to create a good maternal fertility environment. First, the armyworm wheat intercropping corn is mainly affected by 2,3 generations of armyworm damage. The second generation of larvae is particularly serious harm, and its damage peak more in late May to early June. At this point wheat leaves gradually dry, 2