室内增效和药效试验结果表明：丙溴磷对棉铃虫幼虫具有很高的生物活性。与甲胺磷混配对棉铃虫具有一定的增效作用，以１∶６．２５配比增效最为显著，增效效果达１９．１％；混配成的４５％申丙磷制剂对棉铃虫３龄幼虫的共毒系数为１５８．４，温室盆栽棉苗药效好于５０％甲胺磷，与４０％丙溴磷防效接近。 Indoor efficacy and efficacy test results show that: profenofos has a high biological activity of cotton bollworm larvae. The combination of methamidophos and cotton bollworm had certain synergistic effect, the synergistic effect was the most significant at the ratio of 1: 6.25, the synergistic effect reached 19.1%; the mixed synergistic effect of 45% The co-toxicity coefficient of the larvae was 158.4, and the efficacy of potted cotton seedlings in greenhouse was better than that of 50% methamidophos, which was close to that of 40% of profenofos.