Control effect of 7 fungicides on pitaya canker in field
Control effect of seven fungicides on pitaya canker,including mefentrifluconazole·pyraclostrobin 400 g/L SC,pyraclostrobin·fluxapyroxad 42.4％SC,dithianon·pyraclostrobin 16％WDG,difenoconazole· pyraclostrobin 35％SC,difenoconazole·azoxystrobin 325 g/L SC,fluopyram·trifloxystrobin 43％SC and tri-floxystrobin·tebuconazole 75％WDG,was evaluated in the field.The yield of fruit was also evaluated after the application of these seven fungicides.These fungicides were sprayed three times(every 10 days)to the en-tire plant during the vigorous growth period of plant with the effective ingredient dosage of 270 g/hm2,360 g/hm2,360 g/hm2,270 g/hm2,292.5 g/hm2,193.5 g/hm2 and 225 g/hm2,respectively.The results showed that the control effect of seven fungicides with different doses were all above 64％at 14 days after the last spraying.Among them,the treatments of 360 g/hm2 pyraclostrobin·fluxapyroxad,292.5 g/hm2 difenoconazole·azox-ystrobin,193.5 g/hm2 fluopyram·trifloxystrobin and 225 g/hm2 trifloxystrobi n·tebuconazole had over 80％of efficiencies.The yield evaluation results showed that yield increase rate of four treatments exceeded 10％,including 360 g/hm2 pyraclostrobi n·fluxapyroxad,292.5 g/hm2 difenoconazole·azoxystrobin,193.5 g/hm2 fluopyram·trifloxystrobin and 225 g/hm2 trifloxystrobin·tebuconazole.Based on the comprehensive analysis results,these four treatments had the best effect on prevention of the disease in pitaya production.
万方数据
维普
