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http://dx.doi.org/10.5338/KJEA.2005.24.4.409

Efficacy of Suppression of Phytophthora Blight of Red Pepper Caused by Phytophthora capsici by Treatment with Antagonistic Trichoderma harzianum DYMC in Greenhouse  

Lee, Yong-Se (Division of Applied Bioindustry, Taegu University)
Chang, Tae-Hyun (Department of Plant Resources, Sangju National University)
Ryu, Yeon-Ju (Division of Applied Bioindustry, Taegu University)
Park, Jeong-Yong (Division of Applied Bioindustry, Taegu University)
Lim, Tae-Heon (Sangju National University TIC)
Publication Information
Korean Journal of Environmental Agriculture / v.24, no.4, 2005 , pp. 409-415 More about this Journal
Abstract
To control Phytophthora blight of red pepper biologically caused by Phytophthora capsici, we developed Trichoderma harzianum DYMC for commercial product. DYMC was storage at room temperature and was investigated their population every 3 months for 1 year. For investigating the dynamic population of T. harzianum in the pot soils, we applied powder and suspension applications with DYMC, and then investigated for 95 days. The efficacy of powder and suspension applications of DYMC for control of Phytophthora blight of red pepper and plant growth were investigated for 50 days in greenhouse experiment. The population of T. harzianum was decreased at the room temperature for 1 year but there was not statistically significance. After soil treated in the pot with DYMC, the population of Trichoderma spp. was the highest when DYMC powder at 5 g was applied to mix with pot soil, and the population was deceased significantly among treatment means as time goes by ($R^2=0.76$, F=10.5960, P=<.0001). Incidence of Phytophthora blight of, red pepper was significantly reduced among treatment means on 50th day after treated with DYMC ($R^2=0.82$, P=16.4758, P=<.0001). Disease control value was the highest at 62.5% when DYMC powder at 5 g was applied to mix with pot soil. No significant difference (P=0.05) of effects of plant and root growth showed by treated with DYMC on 60th day, except stem. Mixing the application of DYMC powder with soil to control Phytophthora blight of red pepper was greater than suspension application to dilute with water. DYMC could be used as an effective biocontrol agent to control Phythophthora blight of red pepper.
Keywords
Trichoderma harzianum DYMC; Phytophthora capsici; Phytophthora blight of red pepper; antagonistic fungi; blocontrol agent;
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