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http://dx.doi.org/10.5423/RPD.2005.11.2.173

Cultural Characteristics of a Hyperparasite, Ampelomyces quissqualis 94013  

Lee, Sang-Yeob (Division of Plant Pathology, National Institute of Agricultural Science and Technology, Rural Development Administration)
Ryu, Jae-Dang (Division of Plant Pathology, National Institute of Agricultural Science and Technology, Rural Development Administration)
Kim, Hong-Gi (Department of Agricultural Biology, Chungnam National University)
Publication Information
Research in Plant Disease / v.11, no.2, 2005 , pp. 173-178 More about this Journal
Abstract
Ampelomyces quisqualis 94013 (AQ94013), a hyperparasite, was selected as an effective biological control agent against cucumber powdery mildew. Optimal temperature for mycelial growth of AQ94013 was $26^{\circ}C$, and the optimal pH was 6.5. Conidia of AQ94013 were more Produced on potato dextrose agar (PDA) in darkness than under alternating cycles of 12 hr fluorescent light and 12 hr darkness. Temperature range for spore germination of the fungus was $10\~35^{\circ}C$, and optimal temperature was $20^{\circ}C$. Conidial germination of the fungus began 8 hr after incubation at $24^{\circ}C$. Germination rate of conidia at concentration of $5{\times}10^5\;spores/ml\;and\;5{\times}10^6\;spores/ml$ was higher than at concentration of $5{\times}10^7\;spores/ml$. The best source of carbon and nitrogen for mycelial growth of the fungus were dextrin and neopeptone, respectively.
Keywords
Ampelamyces quisqualis 94013; Biological control; Cucumber powdery mildew; Hyperparasite; Spore germination;
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