龙胆草斑枯病综合防治技术研究

目的]探讨龙胆草斑枯病的综合防治技术。方法]分别试验不同用药时期、遮阴方式、栽植密度以及清理田园卫生等方法,对龙胆草斑枯病防治效果的影响。结果]土壤、种苗消毒及苗期用药,防治效果为79.6%;遮阴栽培及与玉米间作可减轻发病,防治效果分别为57.1%和35.8%;清理田园卫生并施药及清理田园卫生可延迟发病4～9 d;栽植密度为200株/m2时,防病效果达42.7%。结论]单靠药剂较难取得理想防治效果,采用土壤消毒、种苗消毒、清理田园卫生、遮阴栽培及药剂防治等综合措施才能取得较好的防治效果。

Studies on the Comprehensive Control Techniques of Spot Blight of Gentiana scabra Bunge

Objective] The research aimed to discuss the comprehensive control techniques of spot blight of Gentiana scabra Bunge.Method] Different spraying pesticide periods,shading methods,transplanting density and methods of cleaning fields were experimented respectively to indicate their control effect on the spot blight of G.scabra Bunge.Result]The results showed that control effect reached 79.6% by means of sterilizing soil,seedling and spraying the pesticide in seedling stage.The disease could be lightened by shading cultivation and intercropping with corn and control effect reached 57.1% and 35.8% respectively.The disease could be delayed 4-9 days when the fields were cleaned,or the fields were cleaned and plants were sprayed pesticide.When the transplant density was 200 plants/m2,the control effect reached 42.7%.Conclusion] The paper indicated that ideal control effect was hard to get by spraying pesticide alone,but it could be got by comprehensively using control techniques of sterilizing soil and seedling,cleaning the fields,shading cultivation and spraying the pesticide.