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春谷钻心虫在山东各地普遍发生,不少地区受害严重。就以1957年的情况来看,如德县曹村红星社为害株率轻者15％,重的27％,平均21％;该县李庄乡五星社重的竟达40—70％。(雲阝)城县汉石桥社发生株率95％,因螟害风折率35％,全县一般螟害株率15—20％。阳谷县大布区轻的10％,重的40—50％。从以上情况可以看出春谷钻心虫为害的严重性。 防除春谷钻心虫以往多剪除虫株,别无良好办法,但此法费工费时,收效不大。我们自
Spring Valley bored worms generally occur in various parts of Shandong, severely damaged in many areas. Judging from the situation in 1957, the Red Star Club of Ruocun County, with 15% of light and 15% of heavy ones, weighed 27% with an average of 21%. (Yun 阝) County Han Shiqiao agency strains occurred 95%, due to stem borer discount rate of 35%, the general population of stem borer rate of 15-20%. Large area of Yanggu County light 10%, heavy 40-50%. From the above situation we can see the severity of the spring worm worms. In the past, there was no good way to prevent the worms of Spring Valley from cutting insects and pests. However, this method is not effective for a long time. We are