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利用 Bt 粉900g·h m - 2 + 苏星1 号30 E C750 ml·h m - 2 对防治第四代棉铃虫有极显著效果,且对天敌无伤害。
The use of Bt powder 900g · h m - 2 + Su Xing 1 30 E C750 ml · h m - 2 has a very significant effect on the control of the fourth generation of cotton bollworm, and no harm to natural enemies.