Treatments Liters of potassium silicate/ha

Damage index (ID ± SE)*

1. Control

4.8 ± 0.45 a

2. 2 liters

3.0 ± 0.00 b

3. 4 liters

3.0 ± 0.45 b

4. 6 liters

2.2 ± 0.45 b

5. 8 liters

2.2 ± 0.45 b

6. 10 liters

1.2 ± 0.45 c