陕西省苹果树斑点落叶病发生及化学防治的研究  

Occurrence and Chemical Control of Alternation Mali Roberts in Shanxi

作　　者：时春喜[1] 祁志军[1] 马小锋[1] 

机构地区：[1]西北农林科技大学植保资源与病虫害治理教育部重点实验室,陕西杨凌712100

出　　处：《农药科学与管理》2003年第9期23-25,共3页Pesticide Science and Administration

摘　　要：本文通过对苹果斑点落叶病在叶片上发病状况的田间调查,结果表明该病从5月上旬开始发病一直持续到9月上旬,其中6月下旬和8月下旬至9月初为该病害发病的两个高峰期,对果树的中后期生长发育影响极大。化学杀菌剂防治苹果斑点落叶病的田间试验表明,无论是保护性杀菌剂,还是治疗性杀菌剂,在5月上旬～6月上旬,喷药3～4次,7月下旬～8月上旬为补充防治时期,化学防治期应持续到8月中旬,间隔10～15d左右喷1次药。Field investigation showed that Alternaria mali Roberts took place from early May to early September.Late June and the period of late August to early September were two occurence-peaks of the Alternaria mali Roberts,which impacted the growth of the trees heavily.The control of chemical fungicides gave the result that both protective and cure fungicides could get about80%control efficacy.The key period of control was from the beginning of May to early June,spray-ing three to four times.The supplement control season was late July to early August,which should be last to middle August,one time per10～15days.

关 键 词：陕西 苹果树 斑点落叶病 发生特点 化学防治 生长发育 田间试验 杀菌剂 

分 类 号：S436.611[农业科学—农业昆虫与害虫防治]