调查越冬代螟虫,习惯的方法是,取一定面积内的外露和半外露稻根,然后用大拇和食指指剥查稻根内不同种类及虫态的螟虫数。这种方法,不仅化工大,而且调查者手剧痛为了寻找既省工省力,又减轻调查者手痛的方法,经多次实践,可用中型剪刀,逐段剪取稻根方法来代替用手指剥查稻根。“剪查”时,应掌整四点要领:“一整二剪三看四确定”。即:把选取的稻根去掉杂草及其他杂物。将15至20稻根握理成为一束。用剪刀逐段剪断每一束内的稻根,一般一次剪断。0.5～～1.0Cm 为宜,剪一次查看一次,如看到有螟虫的痕迹,再细查并确定螟虫种类和虫态。计算虫口密度、死亡率和不同虫态发育进度。这种“剪查”方 The investigation of overwintering adult stem borers, the habit of the method is to take a certain area of ​​exposed and semi-exposed rice roots, and then use the thumb and index finger to peel the different types of rice roots and insect borer number. In this way, not only the chemical industry is large, but also the investigator’s hand pain is to find ways to save labor and alleviate the hand pain of the investigator. After many times of practice, medium-sized scissors can be used to cut the rice root section by section instead of using fingers Peel rice roots. “Cutting”, the palm of the whole four-point essentials: “a whole two cut three see four determine.” Namely: the selected rice roots to remove weeds and other debris. 15 to 20 rice root grip into a bunch. Section by section cut with scissors each rice root, usually a cut. 0.5 ~ 1.0Cm is appropriate, cut once to see, such as saw the traces of borers, and then scrutinize and determine the borer species and insect state. Calculate insect population density, mortality and progress of different stages of development. This “cut investigation” side