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Table 4 Effect of silicon and potassium, sodium and calcium silicates, and a fungicide on enzyme activities of strawberry plants under field conditions

From: Management of strawberry leaf blight disease caused by Phomopsis obscurans using silicate salts under field conditions

Treatment Application Enzyme activities
Peroxidase Polyphenol oxidase Chitinase
Activity Increase % Activity Increase % Activity Increase %
Silicon Soil 1.5 87.5 1.4 133.0 4.5 125.0
Soil+ foliar 1.8 125.0 1.4 133.0 4.5 125.0
Potassium silicate Soil 2.0 150.0 1.8 200.0 5.0 150.0
Soil+ foliar 2.4 200.0 2.1 250.0 6.5 225.0
Sodium silicate Soil 1.5 87.5 1.5 150.0 4.5 125.0
Soil+ foliar 1.8 125.0 1.7 183.3 5.5 175.0
Calcium silicate Soil 2.0 150.0 1.5 150.0 5.5 175.0
Soil+ foliar 2.2 175.0 2.0 233.3 6.0 200.0
Amstar (fungicide) 1 ml/l Foliar 1.5 87.5 1.4 133.0 4.5 125.0
Control Untreated 0.8   0.6 0.0 2.0 0.0