烟草5种杀菌剂致害浓度及药害症状分析

Analysis on Dosage and Symptoms of Phytotoxicity on Tobacco Caused by Five Kinds of Bactericides

[目的]明确5种杀菌剂在烟草上造成药害的最低浓度和药害症状。[方法]通过在推荐用量的基础上设置推荐剂量的多个倍数的浓度梯度,研究了5种杀菌剂在当前烟草主栽品种(云烟87)上造成药害的最低浓度和药害症状。[结果]40%菌核净可湿性粉剂在正常用量3倍时就出现药害症状,而25%溴菌·多菌灵可湿性粉剂、3%多抗霉素水剂、8%宁南霉素水剂、东旺黑达4种杀菌剂在正常用量3倍时不出现症状或症状不明显,而达到6倍时都出现不同的药害症状,用清水处理发生药害的烟草对药害的治理有一定差异。[结论]为准确快速地认识和识别几种烟草药害、最低限度地降低烟草药害对烟草生产造成的损失提供了参考。

[ Objective ] The aim was to understand the lowest chemical dosage and damage symptoms of five kinds of bactericides on tobacco. [ Method ] Through setting multiple times of recommended dosage for bactericides, the lowest chemical dosage and damage symptoms of five kinds of bactericides on current main tobacco breed （ Yunyan 87） were studied. [ Result] Three times of 40% Dimethaehlon wettable powder caused phytotoxieity, while three times of 25% Bromine bacteria ~ Carbendazol wettable powder, 3% Polyoxin aqua, 8% Ningnanmycin aqua and 48% Cuaminosulfate propamocarb did not cause phytotoxicity, but six times of above latest mentioned four kinds of bactericides caused phytotoxicity. Cure level by washing clean water on phytotoxicity tobacco showed certain difference according to bactericides. [ Conclusion] The research results provide reference to accurately and quickly identify and diagnose several kinds of phytotoxicity on tobacco as well as maxi- mally reduce tobacco loss caused by phytotoxicity.