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绿化苗木产药害的原因
绿化苗木产药害的原因
Reasons for Pesticide Injury of Greening Seedlings
1、药剂种类选择不当
1. improper selection of medicaments
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 liquid contains high concentration of copper ion, which is mostly used in woody plants. Because of its tender tissue, herbaceous greening seedlings are liable to produce drug damage. Shi-Su Mixture has a good effect in controlling powdery mildew, but because of its corrosiveness and strong alkalinity, it is easy to cause pesticide damage when used in camphor tree and other herbal greening seedlings.
2、部分绿化苗木对某些农药品种过敏
2. Allergy of some green seedlings 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 greening seedlings are of special nature and are liable to cause drug damage even in normal use. For example, Luan Tree, Ligustrum grandiflorum and Cherry are sensitive to DDVP, peach and plum are sensitive to dimethoate, and peach and plum are sensitive to Bordeaux fluid.
3、在绿化苗木敏感期用药
3. Drug use in 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, and the medication should be cautious.
4、高温、雾重及相对湿度较高时易产生药害
4. High temperature, fog weight and relative humidity are prone to drug damage.
温度高时，香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 medicaments and transpire faster, so that the medicaments quickly concentrate on the tip and edge of the leaves and cause medicament damage; when the fog is heavy and humidity is high, the distribution of medicament droplets is not uniform and the medicament damage is easy to occur.
5、浓度过高、用量过大
5. Excessive concentration and dosage
为克服病虫害之抗性等原因而随意加大浓度、用量，易产生药害，是很多香樟树等苗木产生损害的重要原因之一。
In order to overcome the resistance of diseases and insect pests and other reasons, increasing the concentration and dosage at will is easy to cause pesticide damage, which is one of the important reasons for many seedlings such as camphor tree damage.
Reasons for Pesticide Injury of Greening Seedlings
1、药剂种类选择不当
1. improper selection of medicaments
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 liquid contains high concentration of copper ion, which is mostly used in woody plants. Because of its tender tissue, herbaceous greening seedlings are liable to produce drug damage. Shi-Su Mixture has a good effect in controlling powdery mildew, but because of its corrosiveness and strong alkalinity, it is easy to cause pesticide damage when used in camphor tree and other herbal greening seedlings.
2、部分绿化苗木对某些农药品种过敏
2. Allergy of some green seedlings 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 greening seedlings are of special nature and are liable to cause drug damage even in normal use. For example, Luan Tree, Ligustrum grandiflorum and Cherry are sensitive to DDVP, peach and plum are sensitive to dimethoate, and peach and plum are sensitive to Bordeaux fluid.
3、在绿化苗木敏感期用药
3. Drug use in 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, and the medication should be cautious.
4、高温、雾重及相对湿度较高时易产生药害
4. High temperature, fog weight and relative humidity are prone to drug damage.
温度高时，香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 medicaments and transpire faster, so that the medicaments quickly concentrate on the tip and edge of the leaves and cause medicament damage; when the fog is heavy and humidity is high, the distribution of medicament droplets is not uniform and the medicament damage is easy to occur.
5、浓度过高、用量过大
5. Excessive concentration and dosage
为克服病虫害之抗性等原因而随意加大浓度、用量，易产生药害，是很多香樟树等苗木产生损害的重要原因之一。
In order to overcome the resistance of diseases and insect pests and other reasons, increasing the concentration and dosage at will is easy to cause pesticide damage, which is one of the important reasons for many seedlings such as camphor tree damage.
