共查询到20条相似文献,搜索用时 187 毫秒
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本文论述了50年代以来森林病害由单一树种、单一病害的简单防治, 到目前正在探讨中的森保系统工程的有关防治概念的发展。在防治技术上, 着重讨论了化学防治、生物防治和抗病育种在森林病害防治中的应用及前景。 相似文献
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石斛主要病害及其综合防治技术 总被引:4,自引:0,他引:4
石斛的病害主要由真菌、细菌和病毒引起。介绍了各种病害的病原、病征及侵害部位,并从栽培措施、生物防治措施、化学防治措施等方面介绍了石斛病害的防治方法。 相似文献
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酿酒葡萄霜霉病季节流行动态与爆发成因 总被引:1,自引:0,他引:1
通过对生长季酿酒葡萄园空气中霜霉病菌孢子囊进行逐日逐小时捕捉,并对病情进行调查,记载气象资料,对霜霉病菌孢子囊飞散动态及病害爆发成因进行了详细研究,以期对病害爆发进行预测,用于指导该病的防治.结果表明:8月至9月上中旬为整个生长季中孢子囊飞散的高峰;孢子囊的日飞散动态是昼少夜多,8:00之前和18:00之后孢子囊飞散量占全天的87%.全天各小时段孢子囊飞散量与空气相对湿度呈显著正相关(R=0.676 9,P<0.01),而与空气温度呈显著负相关(R=-O.676 7,P<0.01).品种、地势、空气温度、降雨量和菌量等综合因素共同影响葡萄霜霉病的发生与流行. 相似文献
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大棚切花月季白粉病防治效果分析 总被引:1,自引:0,他引:1
白粉病属大棚切花月季常见的主要病害之一,其防治方法有多种。笔者在总结多年生产实践的基础上,介绍白粉病发病高峰期的几种防治方法及其效果分析,供业内应用参考。 相似文献
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Hua Wu Yingwen Pan Rong Di Qiguang He Mamy Jayne Nelly Rajaofera Wenbo Liu Fucong Zheng Weiguo Miao 《Forest Pathology》2019,49(5)
Powdery mildew is a foliar disease of rubber trees. It is one of the most important leaf diseases in rubber plantations worldwide. The causal agent of this powdery mildew, previously known as Oidium heveae, has been identified under various names. To precisely identify the causal agents of this disease, 57 conidial samples were collected from 2013 to 2017 in Hainan, Yunnan and Guangdong provinces, the main rubber tree planting regions in China. Based on morphological observations using light and scanning electron microscopy, pathogenicity testing, and nrDNA ITS and 28S sequences, Erysiphe quercicola is suggested as the only causal agent of rubber tree powdery mildew in China. 相似文献
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In June 2016, pot‐grown Eucalyptus gunnii plants showing typical symptoms of powdery mildew disease were found in a greenhouse in Korea. Morphological characteristics of the anamorph and molecular sequence analyses of the ITS regions and 28S rDNA verified the fungus as Erysiphe alphitoides, which is known as common and widespread powdery mildew on Quercus spp. Although E. alphitoides has been reportedly associated with powdery mildew diseases of tropical trees and shrubs other than Quercus spp., this is the first finding of E. alphitoides on a Eucalyptus tree worldwide. 相似文献
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成县核桃主要病虫害及其防治措施 总被引:2,自引:0,他引:2
病虫害已成为影响甘肃省成县核桃产业健康、持续、快速发展的主要因素,因此,防治核桃病虫害是该县目前核桃产业发展中亟待解决的重要课题。结合生产实践,就甘肃省成县核桃病虫害进行了专项调查研究,结果发现该县核桃病虫害共有10余种:其中主要病害有白粉病、核桃黑斑病、核桃枝枯病和核桃腐烂病等4种;主要虫害有核桃举枝蛾、核桃云斑天牛、木尺蠖、铜绿丽金龟、舞毒蛾、核桃瘤蛾等6种。还在调查分析的基础上,总结并提出了病害的危害症状、虫害的特征和发生规律及综合防治措施。 相似文献