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在马来西亚,近六年来对白粉病进行调查的结果表明,此病有逐年加重的趋势。据称,在不加化学保护的情况下,产量损失高达10.5％,同时影响茎围增长和树皮再生。近50年来,一直采用抽叶期间每5—7天喷硫磺粉一次的传统保护措施。即使按气象指标正确地定期喷粉,也要连续喷3—4次,很不经济。加上马来西亚白粉病流行季节正值雨季,雨水冲刷使防效不一致或增加喷药次数而提高投资。再说
In Malaysia, the survey of powdery mildew in the past six years shows that the disease is increasing year by year. Allegedly, without chemical protection, yield losses as high as 10.5%, while affecting stem growth and bark regeneration. In the past 50 years, the traditional protection measures of sulfur powder once every 5-7 days during the period of drawing leaves have been adopted. Even if the meteorological indicators of regular dusting regularly, but also to spray 3-4 times in a row, it is not economical. In addition, the season of powdery mildew in Malaysia coincides with the rainy season, and rainwater scarcity increases investment due to inconsistent control effects or increased spraying times. Say it again