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秋季香梨采摘后 ,随着气温的下降 ,梨叶螨也开始寻找越冬场所。梨叶螨以受精雌螨在树干缝隙、老翘皮下、树洞等处越冬 ,对于梨叶螨发生较严重的梨园可采取以下防治措施。１、香梨采摘后 ,气温在２５℃左右时 ,仔细、均匀的喷布一次７３ %的克螨特２０００倍液或牵牛星２５００?
Autumn pear picking, with the temperature drop, pear spider mites also began looking for places for winter. Pear spider mite fertilization female mites in the trunk gap, the old Alice under the trees, such as winter overwintering, pear spider mite Pear more serious can take the following control measures. 1, pear picking, the temperature at about 25 ℃, carefully and evenly sprayed a 73% propargite 2000 times or Altair 2500?