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石果病是砀山酥梨的生理病害,它严重影响果实的品质。本文作者对阿拉尔垦区4个果园砀山酥梨的发病情况进行了观察和大量调查,分析研究表明,石果病的发病程度与树体营养水平、光照条件、Ca元素含量及栽培管理水平等因子密切相关。凡是幼龄树、高接树,衰弱树或旺长树上的果实,个大的果实,树冠内膛的果实,发病均较重。试验对发病严重的树进行喷Ca等药剂防治的结果是,于8月下旬喷0.4％CaCl_2,明显降低了果实石果病发生率;于5月下旬和6月中旬连喷2次浓度为50ppm的NAA,病果率与对照比有较明显的下降,在相同时间喷500ppm PP_(333),对降低石果病卑也有一定效果。通过试验分析,本文作者强调在座果后每隔15天至30天喷1次CaCl_2是降低石果病发生率的有效措施。
Stone fruit disease is Dangshan pear diseases, which seriously affect the quality of the fruit. The authors investigated the incidence of Dangshansu pear in four orchards in Alar reclamation area and conducted extensive investigations. The analysis showed that the incidence of stonefruit disease is closely related to the tree nutrition level, light conditions, Ca element content and cultivation management level closely related. All young trees, high access tree, weak tree or Wang Long tree fruit, a large fruit, the crown of the bore fruit, the incidence is heavier. Test results showed that the spraying of Ca and other chemicals on the severely diseased trees resulted in the spraying of 0.4% CaCl 2 in late August, which significantly reduced the incidence of fruit stone diseases. In late May and mid-June, spraying twice the concentration of 50ppm NAA, the rate of disease and fruit decreased significantly compared with the control, at the same time spraying 500ppm PP_ (333), to reduce the stone humble disease also have some effect. Through experimental analysis, the authors emphasize that spraying CaCl 2 once every 15 days to 30 days after fruit setting is an effective measure to reduce the incidence of stone disease.