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1997年，我们选用45％晶体石硫合剂进行了防治茶黑刺粉虱的药效试验，取得了明显效果。1材料和方法试验在田间进行，设45％晶体石硫合剂，使用浓度为波美0．5度，每0．067hm’用量2009，40％乐果乳剂2000倍（对照农药）和空白对照。喷药工具用工农16型背负式手动喷雾器，喷药时
In 1997, we selected 45% crystalline stone sulfur sulfur agent to control the efficacy of tea black white whitefly, and achieved remarkable results. MATERIALS AND METHODS Tests were carried out in the field with 45% crystalline sulfur-sulfur mixture at a concentration of 0.5 degrees Baume, an amount of 0.067 hmh 2009, 40% dimethoate 2000 times (control pesticide) and a blank control. Spraying tools with a worker-peasant type 16 Knapsack sprayer, when spraying