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http://dx.doi.org/10.5423/RPD.2004.10.4.319

Biological Control of Botrytis Leaf Blight of Lily and Botrytis Gray Mold of Cucumber by Ulocladium atrum  

Lee, Nam-Young (Department of Agricultural Biology, College of Agriculture and Life Sciences, Chungnam National University)
Kwon, Eun-Mi (Department of Agricultural Biology, College of Agriculture and Life Sciences, Chungnam National University)
Kim, Jin-Cheol (Biological Function Research Team, Korea Research Institute of Chemical Technology)
Yu, Seung-Hun (Department of Agricultural Biology, College of Agriculture and Life Sciences, Chungnam National University)
Publication Information
Research in Plant Disease / v.10, no.4, 2004 , pp. 319-323 More about this Journal
Abstract
This study was conducted to investigate the effect of U. atrum treatment on control of Botrytis leaf blight of lily and Botrytis gray mold of cucumber, and to evaluate the U. atrum as the biological control agent of Botrytis diseases. The antagonistic isolates CNU 9037 and CNU 9054 isolated from tomato leaves were identified as Ulocladium atrum Preuss based on morphological characteristics. This is the first record of U. atrum in Korea. In bioassays on dead leaves of tomato and cucumber, treatment of U. atrum colonized the dead leaves and suppressed sporulation of Botrytis as compared with the untreated control. The suppression of spoulation of Botrytis on dead leaf segments by U. atrum was higher when U. atrum was treated before Botrytis was treated. The effect of treatments with conidial suspension of U. atrum on leaf blight of lily and gray mold of cucumber caused by Botrytis elliptica and B. cinerea, respectively, was investigated under greenhouse conditions. Spraying U. atrum ($1{\times}10^6$ conidia per ml) at intervals of 1 week for three times resulted in a significant reduction of natural infections of lily leaves caused by B. elliptica. Protective value of U. atrum treatment was higher than that of the fungicide (procymidone) treatment. Spraying U. atrum also resulted in a significant reduction of cucumber gray mold caused by B. cinerea. Our results show that U. atrum has a potential for biological control against diseases caused by Botrytis spp, in lily and cucumber.
Keywords
Biological control; Botrytis cinerea; Botrytis elliptica; Ulocladium atrum;
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