Treatments

Liters of potassium silicate/ha

Number of eggs per coffee leaf*

At 3 days after 1^st application

At 7 days after the 1^st application

At 7 days after the

2^nd application

At 15 days after the 2^nd application

1. Control

55.60 ± 39.83 a

101.00 ± 19.026 a

75.80 ± 71.00 a

29.00 ± 17.17 a

2. 2 liters

47.00 ± 45.22 a

16.00 ± 25.05 b

40.00 ± 58.03 a

40.60 ± 23.49 a

3. 4 liters

17.40 ± 20.58 a

65.80 ± 40.41 ab

45.40 ± 24.60 a

45.20 ± 44.61 a

4. 6 liters

16.20 ± 15.10 a

18.40 ± 11.15 b

29.80 ± 12.25 a

29.20 ± 28.70 a

5. 8 liters

52.00 ± 51.69 a

25.20 ± 32.57 b

30.80 ± 29.82 a

29.80 ± 12.95 a

6. 10 liters

28.60 ± 34.38 a

18.20 ± 11.76 b

26.80 ± 22.87 a

23.20 ± 21.79 a