77%硫酸铜钙WP防治柑橘溃疡病药效试验

The efficacy test of 77% wettable powder of coppersulfate calcium on controlling citrus canker

进行77%硫酸铜钙WP防治柑橘溃疡病的药效对比试验,试验结果表明:该药对柑橘溃疡病有较好的防治效果,用400、500倍液防治柑橘溃疡病,第3次药前对果的防效达79.92%～85.65%,对叶的防效达80.74%～86.07%;第3次药后15 d对果的防效达80.06%～86.59%,对叶的防效达81.48%～86.87%。在柑橘溃疡病发生初期推荐使用400倍液及500倍液防治,间隔10 d,连续喷雾2～3次以上。

The efficacy test of 77% wettable powder of coppersulfate calcium on controlling Citrus canker was conducted. The results showed that this reagent had better control efficiency on Citrus canker. With 400 and 500 times liquid, its control efficiencies to fruits were 79.92% - 85.65% and to leaves were 80.74% - 86.07% before the third spraying. Its control ef- ficiency to fruits were 80.06% -86.59% and to leaves were 81.48% -86.87% after 15 days of the third spraying. The recommended dose to control Citrus canker in its early occurrence were 400 and 500 times liquid, It should be continuously sprayed for more than 2 or 3 times in the interval of 10 days.