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[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。
[Objective] The results showed that there were less kinds of medicaments available for the prevention and treatment of ginseng gray mold disease, and the virulence of many pesticides against Botrytis cinerea was not clear. Therefore, the toxicity of 22 bactericides to Botrytis cinerea was determined by growth rate method . [Result] The results showed that WP of 50% cyprodinil WG, 50% of Vibrofenacil WG, 50% of sclerotin WP, 50% of deoxynivalenol WP and 50% of iprodione were higher in virulence and the EC50 value was less than 0.1 mg / L, followed by 400 g / L flusilazole EC and other 6 kinds of agents, the EC50 value of 0.1 ~ 1.0 mg / L between. Among the seven kinds of fungicides, the synergistic effects were obvious with 50% VRLC WG + 30% trifloxisol WP 2: 230 ml / g Bacillus + 50% The co-toxicity coefficients were 601.02, 535.94, respectively; and the other 31 kinds of ratio showed different degrees of synergies. [Conclusion] The best antibacterial agents against Botrytis cinerea were screened, which laid the foundation for further field efficacy test.