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Effect of Mepanipyrim on the Resistant Isolates of Gray Mold fungus, Botrytis Cinerea to the Fungicides of Benzimidazole and Dicarboximide  

Koo, Han-Mo (Department of Plant Resources, Kongju National University)
An, Seung-Joon (Department of Plant Resources, Kongju National University)
Shin, Ho-Chul (Central Research Institute of Kyung Nong Cooperation)
Do, Eun-Soo (Department of Oriental Medicine Resources, Jungbu National University)
Shin, Mi-Ho (Department of Crop Science, Konkuk University)
Kim, You-Seok (Department of Crop Science, Konkuk University)
Kim, Jin-Hee (Department of Crop Science, Konkuk University)
Chun, Se-Chul (Department of Molecular Biotechnology, Konkuk University)
Publication Information
Applied Biological Chemistry / v.49, no.4, 2006 , pp. 259-265 More about this Journal
Abstract
Effect of the fungicide mepanipyrim on the resistant and sensitive isolates of Botrytis cinerea was studied in vitro and also tested to control Botrytis rot of strawberry, cucumber and grape in the field. These isolates were selected by relative mycelial growth and spore germination on potato dextrose agar(PDA) incorporated with $100{\mu}g\;a.i./ml$ of benomyl and procymidone, respectively, compared to the unamended PDA. Mycelial growth of the selected resistant isolates was significantly inhibited by mepanipyrim but the inhibition rate was similar to other fungicides belong to benzimidazole or dicarboximide, although spore germination was not inhibited even by the higher concentration of mepanipyrim. When the benomyl and procymidone resistant isolates were inoculated to cucumber leaves, lesion development was significantly inhibited with application of $250{\mu}g\;a.i./ml$ of mepanipyrim but not with that of benomyl and procymidone. In addition, when $250{\mu}g\;a.i./ml$ of mepanipyrim was applied to strawberry, cucumber, and grape in the field, the control of Botrytis rot was significantly different from that of the untreated control(Duncan's multiple range test, p<0.05). The results suggested that mepanipyrim might be an alternative fungicide for the control of benomyl- and procymidone-resistant pathogens of Botrytis rot.
Keywords
benomyl; Botytis cinerea; Botrytis rot; fungicide resistant; mepanipyrim; prochymidone;
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