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杉梢小卷蛾属鳞翅目小卷蛾科。它以幼虫侵蛀杉木嫩梢,使杉梢枯死,严重影响立木的生长,是杉木主要害虫之一。 近几年来,此虫在金坛县普遍发生。1977年调查:方元茶场5年生杉木,主梢被害率在50—70％,雪布公社上阳大队新造杉木林主梢受害率在12％,主梢受害后,年平均高生长量为51.9—53厘米;而未受害的杉木,年平均高生长量为70.9厘米。因此,我所从1976年开始,连续4年,通过野外定期查虫观察、剥被害梢、室内饲养及点灯诱蛾等方法,对杉梢小卷蛾进行了研究,并进行了防治初步试验。 一、生活史 杉梢小卷蛾在我县,一年发生2—3代,以第1、2代幼虫危害最严重,少数分化为第3代。各代幼虫发生期:第1代
Lespedezae larvae Lepidoptera noctuid. It larvae invade fir shoots young shoots, the fir shoots wither, seriously affecting the growth of standing wood, fir is one of the major pests. In recent years, this worm occurred in Jintan County. 1977 survey: Fangyuan Chachang 5-year-old fir, the main shoot damage rate of 50-70%, Snow cloth commune Shangyang brigade new fir plantation damage rate of 12%, the main shoot victims, the average annual growth of 51.9 -53 cm; while the uninjured fir, the annual average high growth of 70.9 cm. Therefore, I started from 1976, for four consecutive years, through the field of regular check insect observation, stripping the victim, indoor rearing and lighting lure moths and other methods, the Cephalotus amblycephala was studied and conducted a preliminary test of control. First, the living history Shao Shan small moths in my county, occurred 2-3 generations a year to the first and second generation larvae most seriously harmed, a small number of differentiation into the third generation. Generation larvae: Generation 1