沟金针虫(Pleonomus canaliculatus Fald)是我县麦区的主要地下害虫,每年都有不同程度的发生,一般年分发生5—10万亩.1977年大发生,全县麦田发生面积达60万亩,虫口密度一般为10—45头/米~2,最高达457头/米~2,以小麦返青一拔节期受害最重,幼虫为害分蘗节,造成大片死苗,严重的地块翻耕改种,为害的严重程度为过去所少见.为此我 Pleomotis canaliculatus (Pleonomus canaliculatus Fald) is the main underground pests in the county wheat area, each year have different degrees of occurrence, the general annual occurrence of 5-10 million mu .1977 occurred, the county occurred in an area of ​​600000 acres of wheat fields , Population density is generally 10-45 head / m ~ 2, up to 457 head / m ~ 2, the most heavily affected by the turning back and greening of wheat, larvae damage tillering Festival, resulting in large dead seedlings, severe land tillage The severity of the damage is rare in the past