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1986年4月21日,我们访问隆化县七家乡西道村红果专业户张勇时,张勇介绍了用乐果涂干防治红果蚜虫简便有效的方法如下: 首先在树干基部,用小刀划l0—15厘米长三道等距小沟(深达木质部);然后用1:1浓度的乐果溶液涂干.涂干后,用塑料布或旧报纸等围上,防止药液蒸发,促进树木吸收。涂干时间,在树液刚刚开始活动为宜,具体时间
On April 21, 1986, when we visited Zhang Yong, a red-fruit specialist in the Xidao Village of Qiju Township, Longhua County, Zhang Yong introduced the simple and effective method for preventing and curing red fruit aphids with dimethoate. The method is as follows: First, at the base of the tree trunk, Cm long equidistant minor groove (deep xylem); then use 1: 1 concentration of dimethoate solution coated dry. After coating with plastic sheeting or the old newspaper and other Wai, to prevent liquid evaporation, to promote the absorption of trees. Tu dry time, the tree liquid has just started activity is appropriate, the specific time