绿化苗木产药害的原因
The cause of pesticide damage of green seedlings
1、药剂种类选择不当
1. Improper choice of agent type
如波尔多液含铜离子浓度较高，多用于木本植物，草本绿化苗木由于组织幼嫩，易产生药害。石硫合剂防治白粉病效果颇佳，但由于其具有腐蚀性及强碱性，用于香樟树等草本绿化苗木时易产生药害。
For example, Bordeaux liquor with high concentration of copper ions is mostly used for woody plants. Because of its tender tissue, herbaceous green seedlings are prone to drug damage. The control effect of the mixture is good, but because of its corrosiveness and strong alkalinity, it is easy to produce pesticide damage when it is used to afforest the seedlings of Cinnamomum camphora and other herbs.
2、部分绿化苗木对某些农药品种过敏
2. Some green seedlings are allergic to some pesticide varieties
有些绿化苗木性质特殊，即使在正常使用情况下，也易产生药害。如三色栾树、大叶女贞、樱花等对敌敌畏敏感，桃、梅类对乐果敏感，桃、李类对波尔多液敏感等。
Some green seedlings have special properties, even in normal use, they are easy to produce drug damage. For example, Luan tree, Ligustrum lucidum and cherry are sensitive to dichlorvos, peach and plum are sensitive to dimethoate, peach and plum are sensitive to Bordeaux.
3、在绿化苗木敏感期用药
3. Use medicine in the sensitive period of greening seedlings
各种绿化苗木的开花期是对农药最敏感的时期之一，用药要慎重。
The flowering period of all kinds of green seedlings is one of the most sensitive periods to pesticides, so the use of drugs should be cautious.
4、高温、雾重及相对湿度较高时易产生药害
4. High temperature, heavy fog and high relative humidity are easy to cause drug damage.
温度高时，香家庄电动伸缩门 保定桌椅  保定水处理设备 河北机械加工 北京电动门  保定养老院  保定防水樟树苗木吸收药剂及蒸腾较快，使药剂很快在叶尖、叶缘集中过多而产生药害;雾重、湿度大时，药滴分布不均匀也易出现药害。
When the temperature is high, camphor seedlings absorb and transpiration quickly, which makes the chemicals concentrate too much at the tip and edge of the leaves and produce pesticide damage; when the fog is heavy and the humidity is high, the distribution of pesticide drops is not uniform, which is also easy to produce pesticide damage.