22种杀菌剂及其不同配比对人参灰霉病菌的毒力测定

[目的]生产上防治人参灰霉病可选择的药剂种类较少,很多药剂对灰霉菌的毒力作用不明确,为此采用生长速率法测定了22种杀菌剂对人参灰霉病菌的毒力。[结果]50%嘧菌环胺WG、50%乙烯菌核利WG、50%菌核净WP、50%腐霉利WP、50%异菌脲WP毒力较高,其EC50值小于0.1 mg/L,其次为400 g/L氟硅唑EC等6种药剂,其EC50值在0.1~1.0 mg/L之间。7种杀菌剂的不同配比中,50%乙烯菌核利WG+30%氟菌唑WP 2∶2,300亿/g芽孢杆菌+50%嘧菌环胺WP 3∶1,增效作用较为明显,其共毒系数分别为601.02,535.94;另有31种配比表现不同程度增效作用。[结论]筛选出了对人参灰霉病菌室内抑菌效果较好的药剂,为进一步田间药效试验奠定了基础。

Toxicity Test of 22 Fungicides and Their Different Proportions agaist Botrytis cinerea

Less fungicides could be used to control ginseng gray mold caused by Botrytis cinerea in ginseng product,toxicity of most fungicides to B.cinerea are not determined.Therefore,the toxicity of 22 fungicides to B.cinerea were tested by mycelium growth rate method.[Results] cyprodinil 50% WG,vinclozolin 50% WG,dimethachlon 50% WP,procymidone 50% WP and iprodione 50% WP had the stronger toxicity with EC50 values lower than 0.1 mg/L.Flusilazole 400 g/L EC and other five fungicides had stronger toxicities with the...