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试验材料与方法:供试药剂用2.5%敌百虫粉剂(上海农药厂1964年产品)喷粉,以6%可湿性666与50%可湿性滴滴涕粉剂稀释液、25%滴滴涕乳剂稀释液、1%666和5%滴滴涕粉作对比试验。水稻品种为银坊、水源300粒,面积33亩。用上海药械厂出产的52丙型压缩喷雾器和FY-5型手摇喷粉器喷粉。喷药前以对角线五点取样,每点50丛,固定下来,喷药后24小时,逐丛逐株剥开稻苞计算幼虫減退率。试验结果:由下表可议看出2.5%敌百虫粉剂
Test Materials and Methods: The tested pesticide was dusted with 2.5% trichlorfon powder (Shanghai Pesticide Factory 1964 product) with 6% wettability 666 and 50% wettable DDT powder diluent, 25% DDT emulsion diluent, 1 % 666 and 5% DDT powder for comparison test. Rice varieties for the Silver Square, water 300, an area of 33 acres. With the Shanghai Pharmaceutical Factory produced 52 C-type compressed sprayer and FY-5 hand duster dusting. Five points before diagonal sampling, each point of 50 plexus, fixed down, 24 hours after spraying, by the plexus pestallation of rice bracts to calculate the rate of larval reduction. Test results: It can be seen from the table below 2.5% trichlorfon powder