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据全国农技推广中心制定的《2012年玉米重大病虫害防控方案》,2012年全国玉米病虫害偏重发生,发生程度重于2011年,玉米螟全国发生面积3.5亿亩次。不同区域防控重点:北方春播玉米区重点防控地下害虫、玉米螟、玉米矮化病、茎腐病和大斑病;黄淮海夏播玉米区重点防控苗期害虫、玉米螟、二点委夜蛾、茎腐病和褐斑病,兼顾防控玉米粗缩病毒病;西南山地丘陵玉米区重点防控玉米螟、纹枯病、大斑病和灰斑病;西北地区重点防控玉米蚜和玉米叶螨。不同生育期防控重点:播种期做好药剂拌种,预防病虫发生;苗期至大
According to the 2012 National Program for Prevention and Control of Maize Pests and Diseases formulated by the National Center for Agricultural Technology Extension and Extension, the national corn pest and disease stress was more prevalent in 2012, with a heavier incidence in 2011 and a maize borer occurring in the entire country of 350 million mu times. Prevention and Control Key Points in Different Regions: Underground pests, corn borer, maize dwarf disease, stalk rot and big blotch are the key prevention and control corn fields in northern spring sowing area; Sting rot and brown spot, taking into account the prevention and control of corn rough virus disease; corn borer, sheath blight, big blotch disease and gray spot disease prevention and control in the cornfields of southwest mountainous areas; key corn prevention and control in Northwest China Aphids and corn spider mites. Prevention and control of different growth priorities: Sowing agent to do seed dressing to prevent pests and diseases; Seedling to large