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在马尾松毛虫越冬前、后分别用低于常规浓度的２．５％溴氰菊酯、２１％增效氰马药液防治马尾松毛虫，越冬前的效果明显优于越冬后。
Before and after the wintering of Pinus massonqua, the control effects of 2.5% deltamethrin and 21% synergistic cyanocaproic solution were respectively controlled before and after wintering. The effect before winter was better than that after winter.