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大螟是安徽省白湖农场的主要水稻害虫,列为病虫预测的主要对象。过去由于没有摸清它的越冬场所,常以稻根、芦苇和茭白遗株为越冬检查对象,往往见越冬虫口很低,而翌年第1代的发蛾量却较多,与实际越冬虫口有出入;无法掌握次年第1代的虫情,预测预报常不够准确,防治工作也容易形成被动。为了纠正这一缺陷,去年冬季检查时,从慎密而深入的调查工作中,发现三棱草是大螟越冬的主要寄主。据检查每百丛三棱草中有大螟幼虫48—64头、荸荠白螟(学名待定)
Sesamia inferens is the main rice pest in White Lake Farm in Anhui Province, and is listed as the main target of pest and disease prediction. In the past because it did not find out its overwintering places, often with rice roots, reeds and prunus persica as the object of inspection overwintering, often seen overwintering insect population is very low, but the first generation of the next year, the amount of hair moths more, and the actual overwintering insect population Access; unable to grasp the first generation of the following year worm, forecast often not accurate enough, prevention and control work is also easy to form a passive. In order to correct this defect, during the winter inspection last year, from the careful and in-depth investigation, it was found that S. trifoliata is the main host for the over-wintering of Sesamia inferens. According to check every hundred plexus Sanle grass has Stemis larvae 48-64 head, water chestnut white borer (scientific name to be determined)