几种杀菌剂及其复配剂对烟草黑胫病菌的毒力测定

摘要

在室内培养条件下,采用生长速率法测定了3种杀菌剂及其复配剂对烟草黑胫病的抑菌效果。结果表明：药剂浓度与抑制作用呈显著的正相关关系,毒力回归方程的相关系数均在0.940 0以上;不同杀菌剂对烟草黑胫病菌的菌丝生长均表现出抑制作用,敌克松、银法利、烯酰吗啉的EC50分别为162.67、113.19、67.84 mg/L;银发利与烯酰吗啉1∶1比例复配增效作用明显,按1∶3比例复配略有增效,按3∶1比例为相加作用。%Under the laboratory incubation conditions,using the growth rate method,the inhibitory effect of three fungicides and their compound on Phytophthora nicotianae was determined.The results showed that the pharmaceutical concentration and inhibition presnted a significant positive correlation.All the concentration coefficients of the virulence of the regression equation were above 0.940 0;Different fungicides all showed inhibition of mycelial growth of Phytophthora nicotianae.The EC50 of fenaminosulf,Silver-haired Lee and enoyl morpholin were 162.67 mg/L,113.19 mg/L and 67.84 mg/L respectively;The Silver-haired Lee and enoyl morpholine ratio of 1∶1 compound synergic effect was obvious,and the ratio of 1∶3 compound had slight efficiency and ratio of 3∶1 had an additive effect.