9种杀菌剂对小麦纹枯病菌的毒力及田间药效

摘要

The laboratory toxicity of nine fungicides against Rhizoctonia cerealis was tested by mycelium growth rate method,and the field efficacy trial was also carried out.The results indicated that 10％ hexaconazole SC,43％ tebuconazole SC and 12.5％ diniconazole WP showed the best inhibitory activity against the growth of R.cerealis with the EC50 value of 0.0651 ～0.6315 mg/L.The 10％ polyoxin WP,30％ ethylicin AS,250 g/L propiconazole EC,50％ carbendazim WP and 20％ triadimefon EC had better antibacterial activity with the EC50 value of 1.3006 ～4.2026 mg/L.The 43％ tebuconazole SC (500 mg/L),12.5％ diniconazole WP (500 mg/L),10％ hexaconazole SC (500 mg/L) and 250 g/L propiconazole EC (500 mg/L) showed better field control effects with the value of 68.7％,66.0％,65.3％,63.3％,respectively.%采用菌丝生长速率法,室内测定了9种杀菌剂对小麦纹枯病的毒力,并进行了田间药效试验.结果表明,10％己唑醇SC、43％戊唑醇SC、12.5％烯唑醇WP,EC50为0.0651～0.6315 mg/L,对小麦纹枯病菌菌丝的抑制活性较强,10％多抗霉素WP、30％乙蒜素AS、250 g/L丙环唑EC、50％多菌灵WP、20％三唑酮EC,EC50为1.3006 ～4.2026 mg/L,抑菌活性也较好;43％戊唑醇SC(500 mg/L)、12.5％烯唑醇WP(500 mg/L)、10％己唑醇SC(500 mg/L)、250 g/L丙环唑EC(500 mg/L)对小麦纹枯病的田间防治效果分别为68.7％、66.0％、65.3％、63.3％,防效较好.