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苹果园斑根腐病是我国北部某些果区新发生的一种为害严重的病害。此病的寄主范围包括苹果、梨、桃、葡萄、柿、刺槐、柳树、杨树以及丝兰等多种木本植物。根部发病后,须根首先变褐死亡,然后逐渐延及其上部的肉质根和六根。在病部形成红褐色、略微凹陷的园形斑点是病害所特有的症状表现,可用作诊断的标志。至于地上部分呈现的症状类型则包括萎蔫、青干、叶缘焦枯以及枝枯四种。通过一系列的分离、接种、再分离试验以及病原菌的鉴定,现已确定园斑根腐病是在根系衰弱的条件下,由 Fusarium oxysporum Schl.、F.solani(Mart.)Sacc.及 F.camptoceras Wollenw.et Reinke 三种镰刀菌寄生引起的。小型防治试验及大面积防治示范的结果表明,以施肥、灌药为中心的综合防治措施具有良好的防治及增产效果。药剂处理中以75%五氯硝基苯可湿性粉剂800倍液、硫酸铜500倍液以及波美0.5—1.0度石硫合剂为佳。
Apple orchard root blight is a newly devastated disease in some fruit growing areas in northern part of China. The disease host range includes apples, pears, peaches, grapes, persimmon, black locust, willow, poplar and yucca and other woody plants. After the onset of the root, the beard first brown death, and then gradually extended to its upper fleshy roots and six. Reddish brown in the diseased part, a slightly concave park-shaped spots are disease-specific symptoms that can be used as a diagnostic marker. As for the types of symptoms presented on the ground, they include wilting, greening, scorching of leaf margins and four kinds of shoots. Fusarium oxysporum Schl., F. solani (Mart.) Sacc., And F. have been identified by a series of isolation, inoculation, re-isolation assays and pathogen identification. Camptoceras Wollenw.et Reinke Three Fusarium parasites. The results of small-scale prevention and control experiments and large-scale prevention and treatment demonstration show that the comprehensive prevention and control measures with fertilization and irrigation as the center have good control and stimulation effects. Pharmacy to deal with 75% pentachloronitrobenzene WP 800 times, copper sulfate 500 times and Baume 0.5-1.0 degrees stone sulfur mixture is better.