修剪对茶树主要病虫害的影响

The Effect of Pruning on the Main Pests and Diseases of Tea Trees

为探讨修剪控制茶园病虫的效果,对春茶采摘后修剪、秋季修剪清园后药剂封园的茶园病虫发生情况进行调查,结果表明,春茶采摘后及时修剪可降低小绿叶蝉、黑刺粉虱、茶黄蓟马、毒蛾类、螨类及茶饼病、茶白星病等茶园病虫害基数,在修剪后50天,对茶黄螨、黑刺粉虱和蚜虫的控制效果达70%以上,对茶饼病和白星病的控制效果达75%以上。在秋茶采摘结束进行10-15 cm的深修剪,清园并用药剂封园后,能有效减少茶园病虫越冬基数,减轻来年病虫害。

Evidences from spring tea trees pruning and autumn tea garden clearing shows that,pruning after spring picking can reduce the occurrence of pests and diseases such as Empoasca pirisuga Matumura,Aleurocanthus spiniferus,Scirtothrips dorsalis Hood,poisonous moths,mite and Phyllosticta theaefolia Hara. 50 days after of pruning,activity of Polyphagotarsonemus latus,Aleurocanthus spiniferus and aphids dropped a whopping 70 percent,while activity of blister blight and cercospora nicotianaemore dropped more than 75 percent. 10-15 cm deep pruning at the end of autumn tea picking,with clearing garden and spreading pesticides can effectively reduce insects overwinter rate,hence alleviate the disease in the coming year.