防治柑橘砂皮病的杀菌剂组合筛选试验

Selection of Fungicide Combination of Controlling Citrus Melanose

为筛选防治柑橘砂皮病效果好的药剂,将9种杀菌剂和1种矿物油增效剂,配制成7种杀菌剂组合,采用田间小区试验现配现用的方法进行了筛选研究。结果表明:7个杀菌剂组合中对柑橘砂皮病防治效果最好的是75%多·锰锌可湿性粉剂(飒复)+17%四氟·嘧菌酯悬浮剂(意莎雷),在4月27日和5月29日喷施该杀菌剂组合和矿物油、6月28日和7月26日喷施该杀菌剂组合、9月29日只喷施矿物油,到11月2日保叶和保果效果分别达到91.95%和91.67%。建议在每年柑橘结果期的4月下旬和5月下旬喷75%多·锰锌可湿性粉剂(飒复)500倍液+17%四氟·嘧菌酯悬浮剂(意莎雷)1 500倍液+94%精炼矿物油增效剂200倍液,6月下旬和7月下旬喷75%多·锰锌可湿性粉剂(飒复)500倍液+17%四氟·嘧菌酯悬浮剂(意莎雷)1 500倍液,9月下旬喷94%精炼矿物油增效剂200倍液即可达到很好的防治效果。在高温季节不需添加矿物油增效剂。

In order to elect the best effective fungicide for controlling citrus melanose(Diaporthe medusaea),9 fungicides and 1 mineral oil synergist was prepared into 7 fungicide combinations on the spot in the field plot experiment.The results showed that among the 7 fungicide combinations,the best effect attributed to Fengfu[75%carbendazim·Mancozeb wettable powder(WP)(12%carbendazim,63%Mancozeb)]+Yishalei[17%tetraconazole·Azoxystrobin suspension concentrate(SC)(7.5%tetraconazole,9.5%Azoxystrobin)].Spraying the fungicide combinations and mineral oil was done on April 27 and May 29,2018,the fungicide combinations on June 28 and July 26,2018,and the mineral oil alone on September 29,2018.By November 2,2018,the effect of preserving leaves and fruits reached 91.95%and 91.67%,respectively.It is suggested to spray 500 times of Fengfu,1500 times of Yishalei and 200 times of 94%refined mineral oil synergist in late April and late May of citrus fruiting period,500 times of Fengfu and 1 500 times of Yishalei in late June and late July,and 200 times of 94%refined mineral oil synergist in late September,which can get very good controlling effect.No need to add mineral oil synergist in high temperature season.