共查询到20条相似文献,搜索用时 109 毫秒
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玉米纹枯病的发生与防治 总被引:2,自引:0,他引:2
介绍了玉米纹枯病的发生和危害;对玉米纹枯病的病原、病症及发病规律进行了研究分析;根据病害发病的规律及流行条件,提出了对玉米纹枯病的综合防治措施。 相似文献
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我国玉米纹枯病发生和防治的研究现状 总被引:7,自引:0,他引:7
我国玉米纹枯病发生和防治的研究现状赵桂东,刘荆(江苏省淮阴市农科所淮阴223001)近年来,玉米纹枯病发生日趋严重,已成为影响玉米产量的主要病害。目前,江苏、山东、吉林、辽宁、湖北、湖南、四川、广西、河南、山西、浙江、陕西、河北等省陆续发生。国内许多... 相似文献
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玉米纹枯病发生和防治研究现状 总被引:2,自引:0,他引:2
玉米纹枯病发生和防治研究现状赵桂东,刘荆(江苏省淮阴市农业科学研究所,淮阴223001)继戚佩坤等(1966)[11]首次报道吉林省玉米纹枯病发生后,随着玉米种植面积的迅速扩大和高产栽培技术的推广,朱惠聪、赵桂东、颜思齐、陈方、高卫东等人[2,5,1... 相似文献
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河南省小麦纹枯病发生规律及综合防治技术研究 总被引:8,自引:0,他引:8
河南省小麦纹枯病的发生可划分为5个时期,即始发期、缓慢增长期、越冬停滞期,盛发期和稳定期小麦纹枯病发生的有利条件是秋冬气温高,春季降雨多;播期早,播量大;偏施氮肥,浇水饮数。 相似文献
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大豆紫斑病的发生规律及综合防治 总被引:1,自引:0,他引:1
大豆紫斑病是大豆生产中的重要病害之一,对大豆的发芽率、品质和产量有一定的影响。文章介绍了大豆紫斑病症状、发生特点、规律和综合防治措施。 相似文献
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随着气候条件和耕作制度的改变,稻象甲已逐渐上升成为赣西北地区的重要害虫,本文研究了稻象甲在宜春的发生规律、生活习性,提出了稻象甲的有效防治措施。 相似文献
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唐山地区水稻条纹叶枯病迅速上升原因及防治对策 总被引:2,自引:0,他引:2
针对唐山地区水稻条纹叶枯病害逐年加重的实际情况,调查总结了该病发生特点,分析了发病原因,主要是由灰背稻飞虱带毒传播引起的。同时提出了防治对策,重点抓好“三统一”防治稻飞虱。 相似文献
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Bacterial isolates of 1274 were obtained from paddy soil, sclerotia of Rhizoctonia solani, lesions of sheath blight (ShB), and rice plants. 相似文献
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Both sheath blight and blast are important rice diseases worldwide. The exploration of environmentally sound practices to control these diseases will help to reduce fungicide application. Effects of rice (Oryza sativa) intercropping with water chestnut (Eleocharis dulcis) on rice sheath blight and rice blast disease as well as the extracts of different plant parts and root exudates from water chestnut on pathogens of rice sheath blight (Rhizoctonia solani) and rice blast disease (Magnaporthe oryzae) were investigated using pot experiments and bioassay tests. The results from pot tests showed that rice-water chestnut intercropping system suppressed sheath blight and blast and improved land equivalent ratio (LER). The results from bioassay tests indicated that extracts and root exudates from water chestnut had significant effects to inhibit the expansion of these pathogens. The scales of these inhibitions were time and concentration dependent. The antifungal activities of the extracts from aboveground parts and pulp of water chestnut were significantly higher than the extracts from other parts and root exudates. The water extracts of aboveground parts showed the highest antifungal activity on both pathogens according to EC50 values. The antifungal activities of the same extracts from water chestnut on R. solani were significantly higher than on M. oryzae. The result suggests that water chestnut possesses bioactive substances to suppress rice sheath blight disease and rice blast disease. The rice-water chestnut intercropping system can be used as an environment-friendly method for diseases control in rice field. 相似文献
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稻水象甲是一种严重危害水稻的害虫,是目前国际、国内植物检疫对象.福建省原仅在福鼎市有少面积发生,近年来有扩散、蔓延的趋势.根据该地区的水稻栽培气候特点,结合虫情监测及防治实践,将稻水象甲的发生规律及综防技术小结如下: 相似文献