白术白绢病的药剂防治研究

Effect of Fungicides on the Sclerotium rolfsii of Atractylodes Macrocephala Koidzz

绿亨一号和多菌灵在室内条件下对白绢菌的菌丝有很强的抑制作用,其EC50分别为5 49mg L和8 84mg L,而井冈霉素为66 07mg L。绿多混合或绿井混合没有显著增效作用,其共毒系数CTC分别是109 05和102 01。田间小区药效试验也表明,绿亨一号和多菌灵对白术白绢病防效显著,井冈霉素的防效很差,三者的防效分别为98 81%、92 48%和26 24%。绿多混合或绿井混合的防效分别是93 67%和54 04%。

Hymexazol and carbendazim show strong inhibition to mycelia of Sclerotium rolfsii in laboratory (EC50=549 mg/l,8.84 mg/l, respectively). But validamycin A is hardly effective ((EC50=66.07 mg/l). The complex of hymexazol and carbendazim or hymesazol and validamycin A do not show high synergistic action (co-toxicity coefficient CTC=109.05, 102.01, respectively). The trial results of field plot are similar to in vitro. Hymexazol and carbendazim are more effective apparently than validamycin A (control effect is 98.81%, 92.48%,26.24% respectively). The complex of hymexazol and carbendazim or hymexazol or hymexazol and carbendazim has an effect of 93.67% or 54.04% respectively.