湿地松幼林主、侧枝弯曲成因及防治研究

Study on the cause of bough and offshoot curving in young plantation of Pinus elliottii and its control

湿地松幼林主、侧枝弯曲是由于土壤、主侧枝缺铜引起的一种生理性病害。采用喷施、根施硫酸铜及喷施硼砂加硫酸铜混合液的方法进行防治，结果表明喷施硼砂加硫酸铜混合液的防治效果达８０．５６％ ～９１．６７％ ，明显优于喷施和根施硫酸铜的防治效果。

The bough and offshoot curving is a physiological disease for lack of copper in the soil and branches.The copper sulfate and the mixture of copper sulfate + borax were applied to the root and crown to control the disease.The result shows that the control effect of spraying the crown with copper sulfate + borax mixtures reaches 80.56%～91.67%,It is more effective than others.