Efficacy of Neem Oil on Cardamom Thrips, Sciothrips cardamomi Ramk., and Organoleptic Studies

Table 2

Effect of TNAU neem oil on thrips damage in cardamom-Devarshola, Gudalur (mean of three observations).

Treatments

PTC

First round of application

Second round of application

Third round of application

3 DAT

7 DAT

14 DAT

Mean

% Redn

3 DAT

7 DAT

14 DAT

Mean

% Redn

3 DAT

7 DAT

14 DAT

Mean

% Redn

TNAU neem oil (A) 2%

31.0

28.6^bc

26.8^b

24.6^b

26.7

23.0

22.7^bc

20.3^bc

18.8^cd

20.6

47.0

15.3^b

12.8^de

10.9^c

13.0

70.6

TNAU neem oil (A) 3%

30.8

28.9^ab

25.1^ab

23.3^ab

25.8

25.7

21.7^bc

19.6^bc

17.9^bcd

19.7

49.3

13.7^b

8.5^ab

6.5^a

9.6

78.3

TNAU neem oil (C) 2%

29.6

27.4^ab

25.6^ab

23.2^ab

25.4

26.8

21.5^bc

19.4^bc

17.2^bc

19.4

50.2

14.3^b

10.2^bc

7.4^ab

10.6

75.9

TNAU neem oil (C) 3%

29.1

25.6^a

23.8^a

21.0^a

23.5

32.3

17.5^a

15.8^a

14.0^a

15.8

59.3

11.6^a

7.7^a

5.3^a

8.2

81.5

Neem oil 2%

29.3

29.0^b

27.2^ab

25.4^b

27.2

21.6

25.0^c

22.8^c

21.0^d

22.9

41.0

17.9^c

14.2^e

11.4^c

14.5

67.2

Neem oil 3%

29.9

28.3^ab

26.9^ab

24.7^b

26.7

23.2

22.8^bc

20.5^bc

18.9^cd

20.7

46.7

15.1^b

11.3^cd

9.5^bc

12.0

72.8

Vijay Neem 2 mL L^−1

30.3

27.4^ab

25.4^ab

22.9^ab

25.2

27.3

19.8^ab

17.7^ab

15.3^ab

17.6

54.7

13.8^b

10.9^cd

7.3^ab

10.7

75.8

Untreated check

29.3

32.7^c

34.7^c

36.7^c

34.7

—

37.7^d

38.6^d

40.3^e

38.9

—

41.7^d

44.2^f

46.4^d

44.1

—

Mean of three observations; PTC: pretreatment count.
In a column, means followed by a common letter(s) are not significantly different by DMRT (𝑃=0.05).