The Plant Pathology Journal 2003;19(2):92-96.
Published online April 30, 2003.
Weeding Efficacy of Melanized Formula with Epicoccosorus nematosporus on Eleocharis kuroguwan in the Field
Yeon Kyu Hong, Jae Min Cho, Jae Youl Uhm, Jong Nae Hyun, Bong Choon Lee, Seok Bo Song, Dong Chang Lee
Abstract
The study was conducted to determine the cultural conditions and the effect of inert fillers for melanization and sporulation abilities of sodium alginate pellets, and the weeding efficacy of the formula in the field. Melanin production of E. nematosporus was affected by striking frequency. Percentage of melanized beads was increased to 80.6% at higher rpm up to 180. The melanized pellets produced more conidia with abundant mucilage than unmelanized pellets. Shaker culture of Epicoccosorus nematosporus with sodium alginate yielded a total of 55 mg per 100 pellets. Percentage of melanized pellets was highest, with 81.0% and 83.3% of melanization, when wheat bran and rice polish were amended and produced the conidia with 65.4 and 68.4 mg per 100 pellets, respectively. When 1 L of conidial suspension of 6.0
Key Words: Eleocharis kuroguwai, Epicoccosorus nemato-sporus, formulation, melanization, weding efficacy


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