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目前我省大部分沙田柚都是50年以上的老树,产量低、品质差,迫切需要更新。其更新技术如下: 1、更新、灭虫:采果后更新修剪,截除病弱枝,密生枝,枯枝,徒长枝和寄生枝,截除的枝条一般占全树枝条的三分之一左右,其次闷杀灭虫,将浸透20—30倍敌敌畏药液的烂布塞进树干蛀洞内,再用泥巴密封,闷杀天牛。
At present, most of the province’s Pomelo is more than 50 years old trees, low yield, poor quality, the urgent need to update. The updated technology is as follows: 1, update, pest control: pick prunes after the update, cut off diseased branches, dense branches, dead branches, leggy branches and parasitic branches, truncated branches generally account for about one-third of the whole tree branches , Followed by the boring kill pest control, will soak 20-30 times dichlorvos liquid bad stuffed into the trunk of the bad hole, and then sealed with mud, boring kill Tian cattle.