不同杀菌剂对小麦赤霉病和叶锈病的防治效果

为明确不同杀菌剂防治小麦赤霉病和叶锈病的效果,在大田条件下进行了不同杀菌剂对这两种病害的防治试验。对小麦赤霉病的防效结果表明:25%氰烯菌酯SC、20%叶菌唑SC、48%氰烯·戊唑醇SC和200 g/L氟唑菌酰羟胺SC的防效较好,防效为83.54%~88.92%;其次为400 g/L戊唑·咪鲜胺EW和430 g/L戊唑醇SC,防效为71.87%和73.31%;50%多菌灵WP的防效仅为58.05%。对小麦叶锈病的防效调查结果表明:30%丙硫菌唑SC、40%丙硫·戊唑醇SC和430 g/L戊唑醇SC的防效较好,防效为84.78%~88.33%;其次275 g/L氟唑菌酰羟胺·丙环唑SE、48%氰烯·戊唑醇SC、40%叶菌·戊唑醇SC和400 g/L戊唑·咪鲜胺EW,防效范围为79.66%~81.56%;200 g/L氟唑菌酰羟胺SC和50%多菌灵WP的防效为69.36%和39.33%。从防治效果、两种病害兼防以及延缓抗药性等方面综合考虑,氰烯·戊唑醇、氟唑菌酰羟胺·丙环唑、丙硫·戊唑醇、叶菌·戊唑醇等交替使用是防治小麦赤霉病和叶锈病比较好的策略。

Control efficacy of different fungicides against Fusarium head blight and leaf rust in wheat

Field trials have been carried out to determine the control efficacy of different fungicides against Fusarium head blight and leaf rust in wheat. Phenamacril 25% SC, metconazole 20% SC, phenamacril·tebuconazole 48% SC and pydiflumetofen 200 g/L SC had the best control effect on Fusarium head blight, with the efficacy from 83.54% to 88.92%, then followed by tebuconazole·prochloraz 400 g/L EW and tebuconazole 430 g/L SC, with the efficacy of 71.87% and 73.31%, respectively. Carbendazim 50% WP was the weakest, with the efficacy of 58.05%. prothioconazole 30% SC, prothioconazole·tebuconazole 40% SC and tebuconazole 430 g/L SC had the best control effect on leaf rust, with the efficacy from 84.78% to 88.33%, then followed by pydiflumetofen·propiconazole 275 g/L SE, phenamacril·tebuconazole 48% SC, metconazole·tebuconazole 40% SC and tebuconazole·prochloraz 400 g/L EW, with the efficacy from 79.66% to 81.56%. Pydiflumetofen 200 g/L SC was weaker, with the efficacy of 69.36%, and carbendazim 50% WP was the weakest with the efficacy of only 39.33%. Taken into account the control efficacy and fungicide resistance, alternative application of phenamacril·tebuconazole, pydiflumetofen·propiconazole, metconazole·tebuconazole and prothioconazole·tebuconazole are considered to be good solutions for Fusarium head blight and leaf rust control in wheat.