麦沟牙甲（Ｈｅｌｏｐｈｒｎｓａｕｒｉｃｕｌａｔｕｓｓｈａｒｐ）又称耳垂五沟甲，属鞘翅目水龟虫科。自８０年代初在南召县的稻茬麦田危害小麦成灾以来，目前，已扩大到南阳市的内乡等县的稻麦两熟区及邻边鲁山县等地，且危害日趋严重。一般年份减产３０％～５０％，重者绝 Ear ditch (Helophrnsauriculatussharp), also known as ear ditch five ditch, Coleoptera water turtles Division. Since the beginning of the 1980s, the rice crop wheat field in Nanzhao County has caused serious harm to the wheat fields. At present, it has been expanded to the wheat-wheat two-cropping areas in the Neixiang County of Nanyang City and Lushan County, which is adjacent to the county. The damage is becoming more and more serious. General years cut 30% ~ 50%, heavy must