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随着红富士等易感品种的大量栽培及普遍进入结果盛期,加上管理措施的变更(如矮化砧木的普及,波尔多液、石硫合剂使用的减少,树体及果园清理不彻底等),轮纹病在某些果产区又上升为主要病害,枝干病瘤累累,死树死枝的现象普遍发生,采果期病果率高达20％～30％,经济损失严重。笔者针对上述问题进行调查、试验,结合有关资料,就以下几个问题提出来商榷。
With the large-scale cultivation of susceptible varieties such as Red Fuji and the prevailing results, coupled with changes in management practices (such as the dwarfing rootstocks, the use of Bordeaux mixture, the reduced use of lime-sulfur compounds, the incomplete removal of tree and orchard ). In some of the fruit producing areas, the occurrence of ring rot disease has risen again as the main disease. The disease of branches and stems is numerous and the dead branches of dead trees are common. The rate of disease-causing fruit is as high as 20% -30% during the harvesting period and the economic loss is serious. The author of the above questions to investigate, test, combined with the relevant information on the following questions put forward to discuss.