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麦田套种的夏玉米,为促使幼苗复壮,使其尽快形成生产能力,为高产搭好骨架,苗期管理应突出抓好以下四个方面的技术措施。一、早喷药治虫二代粘虫为麦套玉米苗期暴发性害虫,其危害盛期多在5月下旬至6月上旬,此时小麦叶片逐渐干枯,粘虫便转移到玉米上取食叶肉。若防治不及时,轻则可使玉米减产11.25～13.72%,严重时高达42.85～47.53%。为了保证幼苗生育良好,免遭粘虫危害,可于麦收前5～7天喷药防治,每亩用50%的辛硫磷乳剂0.5公斤,加水5公斤,或40%氧化乐果1000
Summer corn intercropping wheat fields, in order to promote seedling rejuvenation, as soon as possible to form the production capacity for high yield and put a good skeleton, seedling management should focus on the following four aspects of technical measures. First, the early spraying insects the second generation of armyworms for the wheat sets of maize outbreaks of pests, the peak of its infancy and more in late May to early June, when the wheat leaves gradually dry, the armyworms will be transferred to feed on corn mesophyll. If the control is not timely, ranging from corn yield reduction of 11.25 ~ 13.72%, severe up to 42.85 ~ 47.53%. In order to ensure good seedling growth, free from the threat of armyworm can be sprayed in wheat 5 to 7 days before spraying prevention and treatment of 50% per acre with phoxim 0.5 kg, add water 5 kg, or 40% omethoate 1000