7月天气已大热,本月主要以蛀干害虫和食叶害虫为主要防治重点,主要有星天牛、光肩星天牛、云斑天牛、桑天牛、重阳木锦斑蛾、美国白蛾、合欢巢蛾等。刺吸害虫的为害症状一经出现不易褪去会越来越明显,但除个别种类外,大多数刺吸害虫的虫口密度已减。 July the weather has been hot, this month mainly to stem pests and leafy insects as the main focus of prevention and control, there are Aster, Atractylodes, Landsatus, mulberry, Coptis chinensis, the United States white moth, Acacia Nest moth and so on. It is more and more obvious that the pest-killing symptoms of the sucking insects will not fade easily. However, except for some species, the density of most insect-sucking pests has been reduced.