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http://dx.doi.org/10.4489/KJM.2012.40.4.271

Biological control of Paraconiothyrium minitans CM2 on Lettuce Sclerotinia Rot Caused by Sclerotinia sclerotiorum  

Lee, Sang Yeob (Agricultural Microbiology Division, National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA))
Hong, Sung Kee (Crop Protection Division, NAAS, RDA)
Kim, Jeong Jun (Agricultural Microbiology Division, National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA))
Han, Ji Hee (Agricultural Microbiology Division, National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA))
Kim, Wan Gyu (Agricultural Microbiology Division, National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA))
Publication Information
The Korean Journal of Mycology / v.40, no.4, 2012 , pp. 271-276 More about this Journal
Abstract
A mycoparasite, Paraconiothyrium minitans CM2 was selected for biological control of sclerotinia rot of lettuce caused by Sclerotinia sclerotiorum. The experiment was carried out in a lettuce greenhouse in Yangpyeong from March to April.. When lettuce sclerotinia rot showed in the early stage of occurrence, Conidial suspension of the mycoparasite was weekly treated once to three times onto soil surface around lettuce plants. Incidence of sclerotinia rot in the once-application plot of the mycoparasite ($1{\times}10^7$ spores/$m{\ell}$) and in the benomyl(WP)-treated plot was 11.0% and 2.7%, respectively, whereas that of control was 31.0%. Incidence of twice- and three-application plots of the isolate was 7.9% and 12.8%, respectively. For increasing the effect of the mycoparasite, the experiment for the timing of application of P. minitans CM2 was carried out in a lettuce greenhouse in Yangpyeong and Suwon. Control efficacy against lettuce sclerotinia rot in the soil-drenching plots of P. minitans CM2 ($5{\times}10^6$ spores/$m{\ell}$) in the planting was 75.3~84.7%, and control effect by treatment of the isolate at the pot drenching+the soil-drenching plots in the early stage of disease occurrence was 63.8~58.0%. As the results, P. minitans CM2 could be a prospective biofungicide for biological control of sclerotinia rot of lettuce.
Keywords
Biological control; Lettuce; Paraconiothyrium minitans; Sclerotinia rot; Sclerotinia sclerotiorum;
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