“一品红”施用“敌克松”产生的药害现象

A Phtotoxicity Phenomenon Produced by Using Dexon for Poinsettia

高档木本花卉“一品红”，在温室培育生长过程中，最易发生而且造成直接经济损失的病害主要是根腐和茎腐病，常用农药灌根进行防治，不少植保专家和专业杂志文章建议使用“敌克松”防治此类病害，但在生产实践和实验中，我们发现施用“敌克松”在防治“一品红” 根腐病及茎腐病的同时极易产生药害，甚至是毁灭性的，本文提出的药害现象不仅供植保专家商榷，同时对正确指导实施“一品红”防治病虫害用药有一定的实践意义。

When cultivating the poinsettia which is high-grade woody flower in the greenhouse, the poinsettia is most vulnerable to the disease of root rot and stem rot which will cause direct economic loss, The common method to prevent and treat these diseases is to use pesticide to irrigate the root. Some experts and professional magazine articles suggest using Dexon to prevent these diseases. ＇But in the production practices and some experiments, we find that using Dexon to prevent the root rot and stem rot could cause damage to the poinsettia, sometimes which is destructive to poinsettia. This paper proposed the phytotoxicity phenomenon which is useful for experts in the field of plant protection, at the same time the phenomenon has a certain practical significance when correcdy directing the prevention and control of plant disease and insect pests for poinsettia.