Evaluation of Silicon for Managing Powdery Mildew on Gerbera Daisy

Powdery mildew, caused by Erysiphe cichoracearum or Podosphaera fusca, is a common disease of gerbera daisy (Gerbera jamesonii) grown in Florida. Previous studies demonstrated that silicon reduces powdery mildew in Arabidopsis, cucumber, grape, strawberry, and wheat. In this study, two silicon (Si)...

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Bibliographic Details
Published in:Journal of plant nutrition 2008-12, Vol.31 (10-12), p.2131-2144
Main Authors: Moyer, C, Peres, N.A, Datnoff, L.E, Simonne, E.H, Deng, Z
Format: Article
Language:English
Subjects:
appearance (quality)
Arabidopsis
calcium silicate
crop quality
Cucumis sativus
cut flowers
disease control
disease incidence
disease severity
Erysiphe cichoracearum
fertilizers
floriculture crops
Fragaria
gerbera daisy
Gerbera jamesonii
leaves
nutrient uptake
plant pathogenic fungi
Podosphaera
Podosphaera fusca
potassium silicate
potassium silicates
powdery mildew
silicon
translocation (plant physiology)
Triticum aestivum
Vitaceae
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Summary:Powdery mildew, caused by Erysiphe cichoracearum or Podosphaera fusca, is a common disease of gerbera daisy (Gerbera jamesonii) grown in Florida. Previous studies demonstrated that silicon reduces powdery mildew in Arabidopsis, cucumber, grape, strawberry, and wheat. In this study, two silicon (Si) sources, calcium silicate and potassium silicate, were evaluated for their ability to reduce powdery mildew in gerbera 'Snow White'. The effect of calcium silicate in flower quality and the silicon uptake was also determined. Calcium silicate was not effective in reducing powdery mildew or in improving flower quality. The silicon content of gerberas treated with potassium silicate was slightly greater than that in plants treated with calcium silicate. However, the severity of powdery mildew was not reduced by potassium silicate. The results suggest that silicon may not be useful for managing this disease of gerbera daisy, possibly due to the low accumulation of silicon by gerbera leaves.
ISSN:0190-4167
1532-4087
DOI:10.1080/01904160802459641