吡唑醚菌酯和苯醚甲环唑复配对槟榔炭疽病菌的联合毒力

Co-toxicity of Pyrazoxystrobin and Difenoconazole Against Colletotrichum gloeosporioides on Areca catechu

为了探究苯醚甲环唑与吡唑醚菌酯复配对槟榔胶孢炭疽菌(Colletotrichum gloeosporioides)的毒力增效作用,采用菌丝生长速率法测定了吡唑醚菌酯和苯醚甲环唑及其不同复配比对胶孢炭疽菌的毒力.结果表明,吡唑醚菌酯和苯醚甲环唑对孢炭疽菌的EC 50分别为1.25 mg/L和0.83 mg/L.吡唑醚菌酯∶苯醚甲环唑(有效成分质量比)1∶4,1∶2,1∶1,2∶1,4∶1混配药剂对槟榔炭疽病菌的共毒系数CTC分别为107.20,128.04,146.70,124.37和119.49,其中以吡唑醚菌酯∶苯醚甲环唑质量比为1∶1增效最为明显.研究结果为槟榔炭疽病的有效防治提供了重要的参考依据.

In order to clarify the synergistic interaction of pyraclostrobin and difenoconazole against Colletotrichum gloeosporioides,the toxicity of pyraclostrobin,difenoconazole and their mixtures at different ratios against C.gloeosporioides was determined by mycelial growth rate test.The results indicated that the EC50 of pyrazoxystrobin and difenoconazole was 1.25 mg/L and 0.83 mg/L,respectively.The CTC(co-toxicity coefficient)of pyraclostrobin:difenoconazole at 1:4,1:2,1:1,2:1 and 4:1(mass ratio of active ingredient)against C.gloeosporioides was 107.20,128.04,146.70,124.37 and 119.49,respectively.The synergistic effect of the 1∶1 mixture was the most obvious.