怎样防治甘薯天蛾近两年，卢龙县部分地区连续发生甘薯天蛾为害，对甘薯产量造成很大影响。甘薯夭蛾在卢龙县一般一年发生两代，以第二代发生为害最为严重。８～９月发生时，成虫白天潜伏在草堆或薯田附近建筑物的屋檐、墙壁、作物、矮树丛等阴蔽处，黄昏后飞出取食各种作... How to control sweet potato moths the past two years, Lulong County, continuous occurrence of sweet potato moths in some parts of the sweet potato production has a significant impact. The occurrence of sweet potato moth in Lulong County is generally two generations a year, with the second generation occurring the most serious damage. Occurred from August to September, adult lurking during the day in the haystack or near the eaves of potatoes buildings, walls, crops, bush and other shade, fly out after eating a variety of ...