核桃病害病原菌Pestalotiopsis,sp.的防治研究
摘要：由病原菌Pestalotiopsis sp.造成的核桃病害在大理州危害严重.2006~2009年连续4年的研究表明：在越冬期进行清园，核桃萌芽前、展叶后和座果后（错开花期）分别喷施5°、0.5°、0.3°的石硫合剂，发病期喷施80%的甲基托布津与90%百菌清混合剂（按1∶1混合）1 200倍液，通过清园、预防与化学防治有机结合，并辅以合理营林措施，能有效防治该病原菌的危害并迅速恢复核桃产量.
关键词：核桃病害；病原菌Pestalotiopsis sp.；防治效果
Prevention Research of Walnut Pathogen Pestalotiopsissp.
Ma Jian-peng，Tu Guo-qiang,Kong xuan,He Rui-hua,Wang Wei-guo, Yang Jiang-feng
( Dali Forest pest control and Quarantine Bureau,Dali 671000,Yunnan)
Abstract: Walnut disease caused by pathogen Pestalotiopsis sp. in Dali prefecture is very serious. This research conducted in four consecutive years from 2006 to 2009 shows that cleaning up the garden during winter,spraying 5°,0.5°,0.3°lime-sulphur before walnut sprout,after leaves showing and after fruit (avoid flowering stage),and spraying 1200 times mixture (1∶1 mixture) of 80% thiophanate methyl and 90% chlorothalonil during disease period. Throughgarden cleaning and of chemical prevention and control, supported by reasonable forest management measures, the hazard of the pathogen can be effectively controlled and the walnut production can be rapidly restored.
Key words: Walnut disease；pathogen Pestalotiopsis sp.；prevention effect
核桃病害病原菌Pestalotiopsis sp.属半知菌亚门Deuteromycotion腔孢纲Coelomycetes黑盘孢目Melanconiales黑盘孢科Melanconiaceae 拟盘多毛孢属Pestalotiopsis［1］，在大理州主要危害核桃的叶、花、枝和果.从幼苗到大树均受害，受害后叶和花大量早期脱落，嫩枝枯死，植株内部生理受到干扰和破坏，形成二度萌芽.果实多为下部受害，造成烂果、果实干瘪，严重影响核桃生长和产量.该病害近年来在大理州优质核桃主产区造成严重危害，病情指数达36［2］，年均成灾面积达2....
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