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KMID : 0379119990270020164
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Korean Journal of Mycology
1999 Volume.27 No. 2 p.164 ~ p.169
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Screening of Chemicals on Bacterial Brown Blotch Caused by Pseudomonas tolaasii on Flammulina velutipes
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김태성/Kim, Tae sung
이현욱/신원교/문병주/박현철/송근우/Lee, Hyun Uk/Shin, Won Kyo/Moon, Byung Ju/Park, Hyean Cheal/Song, Keun Woo
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Abstract
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This study was carried out in an attempt to select chemicals such as zeolite granules, chitosan, wood-vinegar, Ca(OCl)₂, NaOCl, against bacterial brown blotch caused by Pseudomonas tolaasii on Flammulina velutipes in laboratory and mushroom unit. Results obtained using these chemicals were summarized. Inhibitory effect on Ca(OCl)₂ and wood-vinegar with 0.5% concentration was shown to caual pathogen, P. tolaasii, by slight damage on the mycelial growth of F. velutipes. Those materials were recognized as promising one for control of bacterial brown bloth on F. velutipes. Disease incidence in control was the highest value as 43.8%; whereas chemical treatment was estimated as 14.6% with 0.5% of Ca(OCl)₂. Disease incidence was inhibited about 20% in chemical treatment with 0.5% of wood-vinegar, 1.0% of Ca(OCl)₂, and 26.1% with 1.0% of wood-vinegar. For the inhibition effects of chemical concentrations, it was effective at the low concentration which was 0.5 % rather than that of 1.0%. Quality of mushrooms was significantly improved, and yields was also increased by 30% in the chemical treatment. In case of Ca(OCl)₂ treatment at 1.0% concentration, the yields was increased by 35.6% showed the highest value among tested chemicals. However, the overall effects including disease incidence, quality and yields suggests that Ca(OCl)₂ is relatively more effective than wood-vinegar, and the optimal concentration controlling the disease was 0.5～1.0% with Ca(OCl)₂ and 0.5% with wood-vinegar.
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