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http://dx.doi.org/10.4489/KJM.2013.41.3.172

Simple Method to Discriminate the Fungicide Resistant Botrytis cinerea Strain in Tomatoes  

Lee, Mun Haeng (Buyeo Tomato Experiment Station, CARES)
Lee, Hee Kyoung (Buyeo Tomato Experiment Station, CARES)
Kim, Sung Eun (Buyeo Tomato Experiment Station, CARES)
Lee, Hwan Gu (Buyeo Tomato Experiment Station, CARES)
Lee, Sun Gye (Buyeo Tomato Experiment Station, CARES)
Yu, Seung Hun (Department of Applied Biology, Chungnam National University)
Kim, Young Shik (Sangmyung University)
Kim, Sang Woo (Department of Applied Plant Sciences, Kangwon National University)
Lee, Youn Su (Department of Applied Plant Sciences, Kangwon National University)
Publication Information
The Korean Journal of Mycology / v.41, no.3, 2013 , pp. 172-180 More about this Journal
Abstract
Grey mold infection rate in tomato was investigated with the inoculation of dead flowers on Botrytis selective media. The grey mold infection rate of flower after fruiting were higher in the order of after 45 days, after 25 days, and fruiting day with 100%, 87% and 65%, respectively. The number of infected flowers were increased with time increase after the flowering before fruiting. BSM (Botrytis selective medium) was used to check grey mold infection rate depending on the flowering stage and cultivar. Grey mold infection rate depending on the flowering stage was similar in all the beef-tomato cultivar as 1.5~5% at preflowering, 1.5~45% at flowering and 75~90% at fruiting. On the other hand, cherry tomato cultivar "KoKo" had lower infection rates of 0~3.5% at pre-flowering, 10~30% at flowering and 20~50% at fruiting. These resulted from the fact that beaf-tomato cultivar have much bigger flowers and larger amount of pollens compared to those of cherry tomato cultivar. The amounts of falling pollens of Botrytis spp. were checked for beaf-tomato cultivar and cherry tomato cultivar using BSTM. The amounts of falling pollens were increased as growth period was extended, and the amount of spores increased rapidly during the outbreak of grey mold. Twelve field trials in Buyeo and Iksan areas showed that Fluazinam, and Diethofencarb+Carbendazim were effective fungicides to control tomato grey mold, and these results were similar to those of field trials with BSTM. This is the first report of Fluazinam as a effective fungicide for the control of grey mold of tomato even though it has not been registered yet for the control of gray mold in tomato.
Keywords
Botrytis cinerea; Fungicide resistance; Tomato;
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