黄金梨果锈的成因及防治

通过3a对黄金梨果锈的调查研究，发现黄金梨果锈的症状有锈斑型和锈点型2种。锈斑型多数于套袋前发生，锈点型则主要于套袋后发生，锈果率为83．4％。果锈发生的原因除与其自身特性有关外，还与周围环境和管理水平关系密切。肥水管理、果实套袋和适当早采是预防果锈发生的关键技术，但任何单一的防治技术效果都不好，必须采取综合防治措施。

STUDIES ON THE CAUSE OF FORMATION AND CONTROL OF THE GOLD PEAR STAINS

The research on the stains of the Gold pear was carried out for three years. The results are as follows.The symptom of the Gold Pear stains was stains-spot type and stains-point type. The stains-spot type appeared before bagging, and the stains-point type appeared after bagging. The ratio of pears with stains was 83.4%. The reasons of stains had direct relation with its characteristics, environment and management methods. Using the technique of bagging two times and proper early picking were the key to prevent stains. But the effect of any single control technique was not proper.It is pointed out that the integrate prevention measures must be used.