施用奇农素和纯植物源药剂对烤烟青枯病的综合防治效果

Comprehensive Control Effects of Qinongsu and Pure Herbal Extracts to Tobacco Bacterial Wilt

为了探索烤烟大田更有效的防治青枯病的方法,通过多年多点田间试验,考察了奇农素、纯植物源药剂结合噻菌铜对烤烟青枯病防控效果及对烟叶经济性状的影响。结果表明,施用奇农素和纯植物源药剂能大大降低烤烟病指,降幅达76.1%。防治烤烟青枯病病害损失的最优组合为：选用抗根茎病品种,将600 g/hm2奇农素、600 kg/hm2纯植物源药剂及噻菌铜3种药剂形成复合药方制剂,于移栽后20 d、青枯病高发期前进行2~3次叶面喷施和灌根。

Field experiments were conducted to investigate the comprehensive control effects of Qinongsu and a pure herbal extracts with thiediazole copper to tobacco bacterial wilt. The results showed that, the control effect was remarkably, and average disease index decreased by 76.1%. To achieve the best effect, we should use the varieties with high bacterial wilt resistance, apply 600 g/ha Qinongsu, 600 kg/ha pure herbal exacts with thiediazole copper to leaves and roots, and apply 20 days after transplanting and in mid-July when bacterial wilt occurs frequently.