论文部分内容阅读
褐斑病是苹果早期落叶病的主要类型,于2002年在陕西渭北大面积发生,导致果园过早大量落叶,对树势和果实品质造成极大的影响。现将该病的防治经验总结如下。1 1至3月(果树休眠期)1)规范修剪。成龄果园冬剪时,要以改善树体通风透光条件为重点,减少枝量,处理好交叉枝、重叠枝,降低褐斑病发病率。2)彻底清园。3月15日以前,彻底清除树上、地面和表层土壤中的病枝、病叶、干僵果、干果台等,集中带出果园处理。3)树体喷药。萌芽前(3月20日),全树喷洒5%菌毒清水剂200倍液或5波美度石硫合剂或50倍液索利巴尔,消灭越冬病源。
Brown spot is the main type of apple early deciduous disease. It occurred in large area in Weibei, Shaanxi Province in 2002, resulting in a large number of deciduous orchards in early orchard, causing a great impact on tree vigor and fruit quality. The prevention and treatment of the disease are summarized as follows. 1 January to March (Dormant period of fruit trees) 1) Specification of pruning. Cheng-sheng orchards winter shears, to improve the tree light conditions of ventilation and focus, reduce the amount of branches, deal with cross branches, overlapping branches, reduce the incidence of brown spot. 2) thoroughly clearing the garden. Before March 15, thorough removal of diseased branches, diseased leaves, dry fruits, dried fruits, etc. in trees, on the ground and in the surface soil will be brought out of the orchard for centralized disposal. 3) Tree spray. Pre-emergence (March 20), the whole tree spray 5% bactericide decontamination agent 200 times or 5 Baume degree stone sulfur mixture or 50 times the liquid Solibal, eliminate winter source.