论文部分内容阅读
1症状表现地老虎俗称土蚕、切极虫,阿勒泰地区以小地老虎、黄地老虎为优势种,主要危害玉米、甜菜、薯类及各种蔬菜,轻则缺苗断垄,重则毁种。初龄幼虫,咬食玉米心叶叶肉,叶片呈现孔洞;大龄幼虫,蛀咬茎部或咬断根茎,使幼苗枯心死亡。三龄前幼虫,危害马铃薯茎叶,三龄后入土危害根茎,严重时,咬断叶柄枝条和主茎,造成缺株断垄;结薯期开始危害块茎将茎咬食出大小、深浅不等的孔,使马铃薯失去商品
1 Symptoms of the tiger commonly known as silkworm, cutting polar worms, Aletai region to small tiger, yellow tiger dominant species, the main harm to corn, sugar beet, potato and vegetables, ranging from lack of seedling break ridge, weight is destroyed Species. The first instar larvae bite corn leaflets, leaves show holes; older larvae, moth bites stems or snapped rhizomes, so that seedling dead heart. Third instar pre-larvae, endangering the potato stems and leaves, after the third instar soil endangering the rhizomes, severe, biting off the petiole branches and the main stem, resulting in lack of broken line ridge; tuber begin tubers will stem bite size, depth The holes make the potato lose its product