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一、前言地老虎类是贵州烟区苗床及移栽缓苗至团棵期发生普遍、为害严重的害虫类群。主要是小地老虎与其他地老虎混发为害。4月中旬～5月中旬移栽的烤烟,受小地老虎的为害:冬耕休闲地里,杂草繁蒌密度大时,烤烟缓苗期致死株常达40%以上;以苦蒿、马兰等为主,间有少量繁蒌时,缓苗期致死株常在7%左右。5月下旬～6月中旬,黄、小、紫地老虎(切根虫)混发,以黄地老虎为主时,烤烟被害株、致死株常在7%左右。贵州福泉、贵定种烟地区,7～8月尤其7月下旬～8月上旬,晚烟地仍有小、黄、紫地老虎(切根虫)混发为害严重的事例,如1964、1965年福泉县皂角
First, the preface to the tiger is Guizhou tobacco seedbed and transplanting Huanmiao to the group stage common, serious damage pest groups. Mainly small tiger and other tigers mixed hair damage. Mid-April to mid-May transplanting flue-cured tobacco, burberry soldes, the damage caused by the small tiger: winter plow leisure, heavy weed density, the flue-cured tobacco plants often up to 40% deadly strains; Artemisia, Malan Etc., mainly between a small amount of time-consuming, recuperation often lethal strains at about 7%. In late May ~ mid-June, yellow, small, purple tiger (root-knot insects) mixed hair, yellow tiger-based, flue-cured tobacco killed strains, often killed in about 7%. Guizhou Fuquan, Guiding tobacco area, July to August, especially in late July ~ early August, there are still small yellow, yellow, purple tiger (cut rootworm) mixed serious cases of harm, such as 19641965 Year Fuquan Xian Zaojiao