Treatments

Liters of potassium silicate/ha

Number of alive mites per coffee leaf*

At 3 days after the 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

29.20 ± 20.61 a

11.40 ± 10.55 a

60.20 ± 19.60 a

49.40 ± 42.55 a

2. 2 liters

23.00 ± 24.09 a

0.80 ± 01.79 a

10.00 ± 08.00 b

17.80 ± 20.62 ab

3. 4 liters

2.40 ± 01.14 a

7.20 ± 05.67 a

37.60 ± 24.70 ab

05.60 ± 06.06 b

4. 6 liters

2.80 ± 02.59 a

1.00 ± 00.70 a

12.20 ± 09.81 b

07.60 ± 03.91 b

5. 8 liters

8.00 ± 07.97 a

5.80 ± 08.01 a

23.00 ± 26.57 b

07.80 ± 05.58 b

6. 10 liters

3.20 ± 04.15 a

0.60 ± 00.55 a

05.00 ± 05.19 b

02.60 ± 02.60 b