共查询到15条相似文献,搜索用时 156 毫秒
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采用平皿生长速率法研究4种杀菌剂对金叶女贞褐斑病的病原素馨生棒孢Corynespora jasminiicola的室内毒力测定。结果表明,4种药剂对该病原菌都有抑制作用。代森锰锌和腈菌唑对素馨生棒孢的抑制效果比较好,有效中浓度(EC50)为11.28 mg/L和2.17 mg/L,而甲基硫菌灵和多菌灵效果较差。 相似文献
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橡胶树内生细菌多样性初探及拮抗菌株的筛选 总被引:1,自引:0,他引:1
经过严格的表面消毒后,从成年橡胶树各组织中分离47份内生细菌.各组织中的内生细菌数量和种类由多到少分别为树根、花序、树皮、叶柄、叶片和果实.以橡胶树多主棒孢病菌Corynespora cossiicola(Berk & Curt.)Wei和炭疽病菌Colletotrichum gloeosporioides Penz.为指示菌,从中筛选出有较好作用的2个菌株,菌落形态观察、生理生化特征鉴定和16S rDNA序列分析表明它们是枯草芽孢杆菌Bacillus subtilis和莫哈韦芽孢杆菌B.mojavensis. 相似文献
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西双版纳橡胶树腐霉菌病害研究初报 总被引:1,自引:1,他引:0
《热带农业科技》2014,(4)
通过对2013年云南西双版纳景讷乡发生的橡胶树病害病组织取样分离,活体致病试验和病原物的分类鉴定,认为是由腐霉属真菌(Pythium sp.)引起的一种橡胶树新病害。土壤板结、长期排水不畅,通透性差,是腐霉属病害发生的重要诱因。 相似文献
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《热带农业科技》1977,(3)
橡胶树炭疽病是橡胶叶部主要病害之一,多在苗圃地和幼年胶林内为害。云南垦区自1962年以来曾对此病作过一些调查研究。近年来随着橡胶事业的发展,橡胶品系的增多,一些高产易感病品系的大面积种植,发现局部地区个别林段开割胶树因病落叶,对胶乳产量有所影响。海南垦区该病发生也较严重。为此国家农林部于1976年下达了该病研究课题。1977年全国四省(区)热作科技座谈会又列为1977—1985年协作课题。为了更好地摸清该病在云南垦区的流行规律,找出有效防治措施,我们开展了该病流行规律的研究,着重进行病源菌的分离鉴定工作。通过大量分离培养、接种试验不仅看到其无性世代,同时还观察到其有性世代。 相似文献
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P S Athukoralage H M Herath S A Deraniyagala R L Wijesundera P A Weerasinghe 《Fitoterapia》2001,72(5):565-567
The hexane extract of the stem bark of Gordonia dassanayakei showed high antifungal activity against plant pathogenic fungi Curvularia sp., Colletotrichum gloeosporioides, Rhizoctonia solani, Corynespora cassiicola, and Fusarium sp. A compound responsible for the antifungal activity was isolated and identified as 3-formyl-2,4-dihydroxy-6-methylbenzoic acid 3-hydroxy-4-(methoxycarbonyl)-2,5-dimethylphenyl ester (1). 相似文献
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L. G. Silva W. C. J. Junior A. F. Souza F. R. Alves E. L. Furtado 《Forest Pathology》2014,44(3):211-218
This study was aimed to evaluate the behaviour of eighteen clones of Hevea brasiliensis (rubber) against South American leaf blight and to study progress of the disease. The experiment was conducted in Cachoeiro de Itapemirim‐ES, where 18 clones were evaluated. The experimental design was a randomized block with four replicates; each experimental unit consisted of three plants. Evaluations were performed at 15‐day intervals on 30 leaflets per tree. Disease incidence was quantified and infection classified according to the stages of development and type of damage. Leaf blight occurred during the entire experimental period; however, disease intensity varied with the resistance level of the clones and the time of year. Clones FX 3864, RRIM 725, RRIM 711, IAC 300 and IAN 873 exhibited the highest resistance to leaf blight. 相似文献