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引言关于农业上重要的杀虫剂,在本刊以前两期里已连续介绍过几种。最近根据报纸的记载,全国各地的虫害,好像愈来愈多,如螟虫、蝗虫、蚜虫、菜虫等已是多不胜举,几乎各种农作物都有害虫,虽然经民众动员捕捉,可是此起彼落,源源不绝。情势这样严重,我们如果不能将这些害虫迅速扑灭,后患殊觉不堪设想。但是怎样才能扑灭呢?仅仅靠民众动员捕捉,虽然也能收获若干效果,但是这种原始的方法总觉得费力多而成效有限,所以杀虫剂的研究和应用,实在是目前最迫切的问题。病害虫的种类是很多的,单在农作物方面每年受到病害虫的损失,
INTRODUCTION Several agricultural insecticides have been described in succession in our previous two issues. According to recent reports in the newspapers, pests all over the country seem to be increasing in number. Insects such as stem borers, locusts, aphids and cabbage insects are numerous and numerous. There are pests in almost all kinds of crops. Although they have been mobilized and mobilized by the public, Hell, endless. The situation is so serious that if we can not quickly exterminate these pests, we will find it inconceivable. However, what can we do to put an end to this? Only by mobilizing and mobilizing the people can achieve some results. However, this original method is always laborious and has limited effectiveness. Therefore, the research and application of pesticides are the most pressing issues at present. Diseases Pests are many types, each year in the crop suffered pests and diseases of the loss,