抓住关键时期预防苹果轮纹病发生１９９４年由于高温、高湿、多雨，苹果轮纹病严重发生，造成大量烂果。据调查，我地烂果率达７０％以上。那么，如何做好１９９５年苹果轮纹病的预防工作，应抓住哪几个关键时期呢？第一、减少越冬菌源。苹果轮纹病枝干上的病斑是侵染果实... Seize the key period to prevent the occurrence of apple ring disease In 1994 due to high temperature, high humidity, rainy, apple ring disease occurs seriously, resulting in a large number of rotten fruit. According to the survey, my rotten fruit rate of 70% or more. So, how to do the prevention of apple ring disease in 1995, which key period should be grasped? First, reduce the source of overwintering. Apple striae disease stems on the disease is infected fruit ...