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http://dx.doi.org/10.4489/KJM.2003.31.2.098

Metalaxyl Sensitivity Related with Distribution Feature of Mating Type of Phytophthora capsici Population from Red Pepper in Korea  

Song, Jeong-Young (Bioshield Co.Ltd., HTVC KAIST)
Yoo, Sung-Joon (Bioshield Co.Ltd., HTVC KAIST)
Lee, Youn-Su (Division of Applied Plant Sciences, Kangwon National University)
Kim, Byung-Sup (Department of Applied Plant Sciences, Kangnung National University)
Kim, Hong-Gi (Department of Agricultural Biology Chungnam National University)
Publication Information
The Korean Journal of Mycology / v.31, no.2, 2003 , pp. 98-102 More about this Journal
Abstract
Metalaxyl sensitivity related with distribution feature of mating type was characterized far Phytophthora capsici population, totally 433 isolates of the red-pepper pathogen collected from 75 pepper fields in Korea from 1995 to 1998. At the concentration of metalaxyl $2{\mu}g/ml$, inhibition rate of mycelial growth of P. capsici isolates was 68.2% in average compared to control, and 28.6% isolates in average were estimated as resistance to the chemical. Isolates of field unit with a single mating type revealed similar level of sensitivity to metalaxyl and showed sensitive or resistant in most field units. However, isolates of field units with both mating types revealed diverse sensitivity level to the chemical and various occurrence ratio of metalaxyl sensitive : resistant in each field unit. Results indicated that different levels of metalaxyl sensitivity of P. capsici population in Korea seem to be closely related with occurrence ratio of A1 : A2 mating type of each field.
Keywords
Mating type; Metalaxyl sensitivity; Pepper; Phytophthora capsici;
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Times Cited By KSCI : 1  (Citation Analysis)
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