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山东省北部地区棉田病虫草害发生种类多,危害重、损失大,为切实做好棉田病虫草害的综合防治工作,制订如下防治技术规范。1、4-5月份主要病虫草害是:苗病、苗蚜、杂草、地下害虫等。各种病虫害的防治指标或防治适期:苗病:死苗率2%;苗蚜:3片真叶前卷叶株率10%,4片真叶后卷叶株率2
In the northern part of Shandong Province, there are many kinds of pests and weeds occurring in the cotton fields, which are harmful and heavy losses. In order to effectively prevent and control pests, diseases and weeds in cotton fields, the following technical specifications for prevention and control are formulated. 1, April-May The main pests and diseases are: Miao disease, seedling aphid, weeds, underground pests and so on. Prevention and treatment of various pests and diseases Indications or control Miao Miao: Miao disease: dead seedling rate of 2%; Seedling aphids: 3 true leaves before the roll of plant rate of 10%, 4 true leaves after the roll of plant rate 2