旱地玉米免耕秸秆覆盖条件下病虫害发生特点及防治技术研究

试验证明，旱地玉米免耕秸秆覆盖使玉米螟和玉米黑粉病的为害减轻，地下害虫和玉米丝黑穗病为害加重。玉米丝黑穗病、玉米黑粉病和玉米螟的防治策略是尽可能地减少覆盖秸秆中病穗的残存和越冬基数；地下害虫防治应推行种子包衣技术和在为害期撒播毒饵的方法。

The Study on Disease and Pests Bionomics and Control Technique under Condition of Maize Straw Mulching on Dry Farmland

The experiment proved that the damage of maize borer (Ostrinia nubilalis) and Ustilago maidis is decreased under condition of maize straw mulching cultivation on dry farmland, but the damage of underground pests and spthcelotheca reiliana was increased. If the thecnique of straw mulching is applied in large area continuously, 4 above mentioned pests and diseases is in tendency of epidemy. Ustilago maidis is an important disease in some years. The controlling tactics of Ustilago maidis, spthcelothca reiliana, and ostrinia nubilalis are diminishing infected maize straw as more as possilbe and decreasing the amount of overwintering larvae of maize borer. The seed dressing and spreading poisoned bait should be extended in underground pest control.