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螟虫为我省水稻首要害虫,为了摸清其发生规律,几年来曾进行一系列的调查观察。55年在本站结合螟虫预测预报的工作,着重进行了666、223藥剂防治试验。现将试验结果,初步总结如后。 一、本省螟虫的种类及发生规律 (一)本省水稻螟虫的种类。根据近几年来的调查,本省发生的螟虫种类除二化螟、三化螟、大螟外,我站于54年在晚稻田新发现一种褐边螟虫。这种螟虫在55年的预测灯下,于5月中旬即有出现,比三化螟出现蛾子要早(历年来在长沙地区三
Stem borers for rice in our province the most important pests, in order to find out the occurrence of the law, the past few years have conducted a series of investigations and observations. 55 years in this site combined with the prediction of stem borers work, focusing on 666,223 pharmaceutical control trials. The test results are summarized as follows. First, the province’s borer species and occurrence of (a) the type of rice stem borers in the province. According to the survey in recent years, the occurrence of stem borers in our province except for the second generation rice stem borer, Borer, Sesamia inferens, I station in 54 years in the late rice paddy found a new brown stem borer. This stem borer occurs at mid-May under the 55-year-old forecast lamp, which is earlier than the emergence of the moth in the rice stem borer (over the years in Changsha III