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http://dx.doi.org/10.5423/RPD.2010.16.2.158

Selection of Biocontrol Agents against Phytophthora Blight of Pepper and Its Root Colonization Ability  

Zhang, Li-Jing (College of Plant Protection, Henan Agricultural University)
Shi, Hong-Zhong (Xinyang Agricultural College)
Wang, Jing-Jing (College of Plant Protection, Henan Agricultural University)
Chang, Shu-Xian (College of Plant Protection, Henan Agricultural University)
Shen, Shun-Shan (College of Plant Protection, Henan Agricultural University)
Publication Information
Research in Plant Disease / v.16, no.2, 2010 , pp. 158-162 More about this Journal
Abstract
Four promising biocontrol agents against Phytophthora capsici were selected from 507 bacterial isolates collected from rhizosphere soils and roots of pepper plants. In vitro experiment, these four biocontrol agents inhibited mycelial growth, germination of cystospores, and formation of zoosporangia and zoospores of Phytophthora capsici. In the pot experiment, the four biocontrol agents showed control efficiency higher than 70%. In greenhouse experiment, the isolates G28-6 gave the control value of 79.4%. These four biocontrol agents successfully colonized in the population density beyond 105 cfu/g on roots of pepper in vitro. The isolates G28-6 was identified as Pseudomonas aurantiaca, based on its cultural, morphological, and biochemical characterization and 16S rRNA gene sequence analysis.
Keywords
Biocontrol agent; Phytophthora blight of pepper; Root colonization;
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Times Cited By KSCI : 1  (Citation Analysis)
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