농약과학회지 (The Korean Journal of Pesticide Science)
- 제4권2호
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- Pages.37-43
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- 2000
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- 1226-6183(pISSN)
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- 2287-2051(eISSN)
규소 시용에 의한 오이 흰가루병 발병억제
Effects of soluble silicon on development powdery mildew(Sphaerotheca fuliginea) in cucumber plants
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Lee, Jung-Sup
(Nat'l Horticultural Research Institute) ;
- Yiem, Myeong-Sun (National Alpine Experiment Station, R.D.A)
- 발행 : 2000.06.30
초록
본 시험은 오이 양액재배시 배양액내 규산칼륨(
Effects of silicon application on development of colonies of Sphaerotheca fuliginea were examined. Cucumber plants were applied with nutrient solutions amended with different concentrations of soluble silicon and selected leaves were inoculated with known concentrations of conidia of the pathogen. Colony number per leaf, colony area per leaf, and germination rate of conidia of S. fuliginea collected from the inoculated leaves were reduced as silicate concentrations in the nutrient solutions increased from 0.05 to 4.10 mM. The increase in resistance of plants to mildew infection was apparently due to silicate accumulation in leaves, and there was no correlation between cation or ionic strength effects and the silicate treatments. Silicate treatment in growth medium remarkably suppressed powdery mildew development on cucumber. Colonies of mildew fungus were visible with over approx. 38.3% of the mature leaf surface, while that of the leaves in high Si plants was 2.3% observed at 51 days after transplanting. No significant differences were observed between 1.7 mM and 3.4mM silicate treatments. Conidial germination rates were significantly reduced by increasing Si amendments. Conidial germination ranged from 14.7 to 20.3% for plants grown in low Si solution(<1.40 mM), and from 9.0 to 12.4% for plants grown in high Si solution(>1.8 mM). Foliar applications of Si with