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KMID : 0379119730010010003
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Korean Journal of Mycology
1973 Volume.1 No. 1 p.3 ~ p.11
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Studies on the Pathogenicity of Aphelenchoides sp . and Rhabditis sp . attacking Cultivated Mushroom , Agaricus bisporus (Lange) Sing
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김동수/Kim, Dong Soo
한용식/박중수/신관철/Han, Yong Sik/Park, Jung Su/Shin, Kwan Chul
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Abstract
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Four species of nematodes attacking mushroom beds were found in samples taken from 35 mushroom farms throughout Korea. These were Rhabditis sp., Aphelenchoides sp., Ditylenchus sp. and Aphelenchus sp., Rhabditis sp. was found from compost and casing from all mushroom farms and the frequencies of Aphelenchoides sp. was 31.4% in the both compost and casing.
Both Ditylenchus sp. and Aphelenchus sp. showed 2.7% io of frequencies in the compost, none in casing.
Temperature and moisture content of compost affected pathogenicity of Aphelenchoides sp. on mushroom mycelia grown in compost.
The higher temperature and moisture content the sooner the damage became apparent, and the more rapid was subsequent destruction of mycelia. There was no mycelial destruction at the lowest temperature of 10℃.
Rhabditis sp. completely disintegrated mycelia grown in the compost, in the early stage, the numbers of Rhabditis sp. rose gradually and then increased suddenly to reach a peak but soon declined.
At first, the pH of Rhabditis-infested spawned compost declined but then rose gradually as mycelia was disintegrated by nematodes. The trend in pH of infested unspawned compost was similar to those of uninfested, unspawned compost.
Cultures inoculated with surface-disinfected dead Rhabditis sp. and with tap water used in the nematode extraction procedures showed no mycelial injury associated microorganisms containing within or outside the nematodes even though added by artificial wounding of the mycelia.
Cultures artificially wounded showed no injury away from the wounds without the presence of living Rhabditis sp., such wounded mycelia slowly regenerated. On the other hand, artificial wounding accelerated the breakdown of mycelia in the presence of living Rhabditis sp.
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