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http://dx.doi.org/10.11625/KJOA.2013.21.2.265

Control of Powdery Mildew on Sweet Persimmom Using Cooking Oil and Yolk Mixture in the Orchard  

Kwon, Jin-Hyeuk (경상남도농업기술원)
Lee, Heung-Su (경상남도농업기술원)
Choi, Seong-Tae (경상남도농업기술원 단감연구소)
Shim, Chang-Ki (국립농업과학원 유기농업과)
Jee, Hyeong-Jin (국립농업과학원 유기농업과)
Publication Information
Korean Journal of Organic Agriculture / v.21, no.2, 2013 , pp. 265-270 More about this Journal
Abstract
Cooking oil and yolk mixture (COY) was applied to control the powdery mildew of sweet persimmon at the research field of Gyeongsangnam-do Agricultural Research and Extension Services from 2010 to 2011. COY was sprayed three times with 10 days interval on foliar parts of sweet persimmon and the disease development was monitored after 5 days of final spray. Diseased leaf area rate was 13.4% and the control efficacy of COY against powdery mildew was 80.5%. Disease rate was 68.6% on negative control. Using scanning electron microscope (SEM), the morphological changes of the powdery mildew fungus on the leaf surface were observed. On COY-treated leaves, fungal mycellia were morphologically characterized by a loss in cell volume, shriveling, plasma membrane rupture, and subsequent loss of intracellular contents. It may due to the destruction of fungal cell wall or membrane structure.
Keywords
cooking oil and yolk mixture (COY); phyllactinia kakicola; powdery mildew; sweet persimmon;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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