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KMID : 0903520060490040259
Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2006 Volume.49 No. 4 p.259 ~ p.265
Effect of Mepanipyrim on the Resistant Isolates of Gray Mold Fungus, Botrytis Cinerea to the Fungicides of Benzimidazole and Dicarboximide
Koo Han-Mo

An Seung-Joon
Shin Ho-Chul
Do Eun-Soo
Shin Mi-Ho
Kim You-Seok
Kim Jin-Hee
Chun Se-Chul
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 ¥ìg 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 ¥ìg a.i./ ml of mepanipyrim but not with that of benomyl and procymidone. In addition, when 250 ¥ìg 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.
KEYWORD
benomyl, Botrytis cinerea, Botrytis rot, fungicide resistant, mepanipyrim, prochymidone
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