烟草漂浮育苗中剪叶工具消毒剂评价

为了指导烟草漂浮育苗中剪叶工具消毒剂的使用,采用半叶法测定了9种药剂对烟草病叶汁液中TMV的钝化效果,采用叶面喷雾法测定了药剂对烟草的药害浓度与药害症状。室温下一定浓度的药剂与TMV病叶汁液(终浓度为2万倍稀释液)混合时,30%有效氯漂白粉10倍液、98%磷酸三钠·12H₂O 10倍液、7%有效氯次氯酸钠150倍液、美国消毒剂125倍液和75%酒精,在3min内抑制率可达100%。除0.6%菌毒净较安全外,供试消毒剂在标签(常用)浓度下接触烟草叶片,产生较严重药害,症状因消毒剂种类不同,主要为褪绿斑点、坏死斑点和畸形。 

Evaluation of disinfectants applied on clipping tool in tobacco float seedling preduction

Nine chemicals were evaluated for their effects on TMV and injury and dosage in tobacco seedling. Local lesion as-say indicated that when mixed with TMV-infected leaf juice dilution within 3 minutes, 5 disinfectants showed 100% inactivation ratio, including 30% chloride of lime 1:9 solution, 98% trisodium phosphate 1:9 solution, 7% sodium hypochlorite 1:150 solution, anonymity disinfectant used in USA 1:125 solution, and 75% alcohol solution. When mixied with TMV-infected leaf juice dilution within 30 min, 10% chlorine dioxide 1:200 solution showed 100% inactivation ration. Except 0.6% Jundujing, other tested disinfectants in labeled dosage can induce injuries to seedling leaf with different symptoms, such as chlorotic spot, necrotic spot and disorder.