Effect of Toxins Isolated from Exserohilum monoceras (Drechsler) Leonard and Suggs on Echinochloa crus-galli (L.) Beauv

S1; Exserohilum monoceras (Drechsler) Leonard and Suggs is a potential biocontrol agent for the control of Echinochloa species. This fungus causes leaf blight in Echinochloa species, but does not damage rice. Phytotoxicity of the fungal fermented broth was evaluated through the bioassay and the acti...

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Published inAgricultural sciences in China Vol. 8; no. 8; pp. 972 - 978
Main Authors CHEN, Yong, ZHENG, Wei, WANG, Li-ming, CUI, Hai-lan, LI, Guo-xi, LIU, Xin-gui, HAN, Cheng-chou, ZENG, Ren-sen
Format Journal Article
LanguageEnglish
Published Weed Science Laboratory, College of Agriculture, South China Agricultural University, Guangzhou 510642, P.R.China%Department of Weed and Rodent Biology and Management, Institute of Plant Protection, Chinese Academy of Agricultural Sciences,Beijing 100193, P.R.China 01.08.2009
Subjects
Echinochloa crus-galli
Exserohilum monoceras
active ingredients
phytotoxin
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Summary:S1; Exserohilum monoceras (Drechsler) Leonard and Suggs is a potential biocontrol agent for the control of Echinochloa species. This fungus causes leaf blight in Echinochloa species, but does not damage rice. Phytotoxicity of the fungal fermented broth was evaluated through the bioassay and the active ingredients were preliminarily isolated by using silica gel column chromatography (CC) in this study. The most active fraction 5-Ⅲ was obtained and analyzed by gas chromatography-mass spectrometry (GC-MS). The results show that 5-Ⅲ consisted of many compounds, in which 36 compounds accounted for 94.24% of total peak area. Di-n-butyl phthalate (DBP) displayed the highest activity accounted for 9.24% of the total peak area, suggesting that DBP may be one of the main active compounds produced by E. monoceras.
ISSN:1671-2927
DOI:10.1016/S1671-2927(08)60302-8