20%克威特灵可湿性粉剂对烟草脉坏死病的防效

The Effect of 20% Keweiteling WP on Tobacco Vein Necrosis Disease

室内生测结果表明,20%克威特灵可湿性粉剂500～600倍液对烟草脉坏死病有预防和治疗的作用,其中预防效果达到85.06%,治疗效果达到78.67%。田间小区试验表明,20%克威特灵可湿性粉剂500倍液、600倍液、700倍液处理后,对烟草脉坏死病的防效分别为82.56%、80.09%、74.45%,均显著高于对照药剂20%吗啉呱.乙铜可湿性粉剂500倍液。通过3个地区的大田示范表明,20%克威特灵可湿性粉剂600倍液对烟草脉坏死病田间防效达到80%以上,同时,烟叶产量、产值、均价、上中等烟比例等均有明显提高。

The research of 20% Keweiteling WP on tobacco vein necrosis disease in greenhouse showed that the preventive effect of 20% Keweiteling WP was up to 85.06%, the curative effect was 78.67%. The control effect of 20% Keweiteling WP at dilution of 500, 600, 700 times were up to 82.56%,80.09%,74.45% respectively in fields, which was surperior to 20% moroxydine hydrochloride.cupper acetate WP at dilution of 500 times. Meanwhile, 20% Keweiteling WP also improved the yield ,quality and value of tobacco leaves when used in three areas in fields.