Effect of Silicon and Host Resistance on Sheath Blight Development in Rice.
F Á Rodrigues Peters1, L E Datnoff2, G H Korndörfer3
1Graduate Research Assistant, University of Florida-IFAS, Plant Pathology Department, Gainesville, FL, 32611-0680.
Plant Disease
|March 3, 2019
Summary
Silicon fertilization significantly reduced rice sheath blight severity and increased dry matter accumulation in plants. This strategy is effective for disease management, especially in silicon-deficient soils.
Area of Science:
- Agricultural Science
- Plant Pathology
- Soil Science
Background:
- Sheath blight is a major rice disease.
- Silicon plays a role in plant defense.
- Silicon availability can be limiting in certain soils.
Purpose of the Study:
- To evaluate the effect of silicon fertilization on sheath blight severity in rice.
- To assess silicon's impact on rice dry matter accumulation.
- To determine if silicon application complements host resistance.
Main Methods:
- Rice cultivars with varying resistance levels were grown in silicon-deficient soil.
- Calcium silicate slag was applied as a silicon source.
- Sheath blight severity, infected tillers, and dry matter were measured.
Main Results:
- Silicon application increased plant silicon concentration by 80%.
- Silicon significantly reduced sheath blight severity and infected tillers across cultivars.
- Dry matter accumulation increased by 15% without disease and more than doubled in infected plants.
Conclusions:
- Silicon fertilization is an effective strategy for managing rice sheath blight.
- Silicon application enhances host resistance and improves plant growth.
- This approach is particularly beneficial in silicon-limited agricultural environments.
Keywords:
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