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Position: Home > Articles > Identification and Characteristics of Rhizoctonia on Cymbopogon citratus Chinese Journal of Tropical Agriculture 2011,31 (6) 13-17+20

香茅纹枯病病原菌的分离鉴定及其生物学特性

作  者:
李珍;李增平
单  位:
海南大学环境与植物保护学院
关键词:
香茅;纹枯病;立枯丝核菌;生物学特性
摘  要:
对香茅纹枯病病原菌进行分离鉴定及其生物学特性研究。结果表明:香茅纹枯病病原菌为立枯丝核菌(Rhizoctonia solani Kühn);其最适生长培养基为马铃薯葡萄糖琼脂培养基,最适pH值为8,在可溶性淀粉为碳源的查彼克琼脂培养基上生长最快,在麦芽糖为碳源的查彼克琼脂培养基产菌核最多;该病原菌生长对氮源有一定偏嗜性,一般应在其分离培养基内添加硝酸钾作氮源;最适培养条件为25~30℃,全光照。寄主范围测定表明,人工接种该病原菌能侵染花梨木(Dalbergia odorifera T.Chen)、大叶桃花心木(Swieteniamacrophylla King.)、虎刺梅(Euphorbia milii var.splendens(Bojer ex Hook.)Ursch)、玉米(Zea mays L.)、水稻(Oryza sativa L.)、新台糖22号糖蔗(Saccharum officinarum L.T22)和果蔗(Saccharum sinense L.Home.)、雨树(Samanea saman(Jacq.)Merr.)、普通烟(Nicotiana tabacum L.)、发财树(Pachira aqualica Aubl)等10种盆栽植物幼苗。
译  名:
Identification and Characteristics of Rhizoctonia on Cymbopogon citratus
作  者:
LI Zhen LI Zengping(Environment and plant protection College of Hainan University,Hainan,Danzhou 571737)
关键词:
Cymbopogon citrates;rhizotonia;biological characteristics
摘  要:
Identification and characteristics of Rhizoctonia on Cymbopogon citratus.This result showed that the pathogen was Rhizoctonia solani Kühn.The best optimum medium was PDA and pH was 8 respectively.The mycelial growth was the fastest in Czapek which took Soluble starch as carbon sources;and the most Sclerotia in Czapek which took maltose as nitrogen sources.The pathogen had a certain bias on the tropism of nitrogen and culture medium should is appropriate to add potassium nitrate as nitrogen source.The optimal culture condition: temperature from 25℃ to 30℃,full light.Determination of host range show that Inoculated with the pathogen could infect 10 different plants which included Dalbergia odorifera T.Chen,Swietenia macrophylla King,Euphorbia milii var.splendens(Bojer ex Hook.) Ursch,Zea mays L.,Oryza sativa L.,Saccharum officinarum L.(T22),Saccharum sinense L.Home.,Samanea saman(Jacq.) Merr.,Nicotiana tabacum L.,Pachira aqualica Aubl.

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