第一代二化螟以枯鞘内幼虫数量为防治指标比用枯鞘株率作指标的准确性高,适宜范围广。第二代可用枯鞘株率作指标,也可用第一代残虫量作为策略指标。 The first generation of stem borer sheath blight larvae number of indicators for the prevention and control than the rate of blight sheath rate as an indicator of high accuracy, suitable for a wide range. The second generation can be used as an indicator of the rate of dead sheath, but also can be the first generation of the amount of residual as a strategic indicator.