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Table 4 Evaluation of biocontrol agents against C. punctiferalis in guava during winter season, 2020–21

From: Evaluation of augmentative biological control options against fruit and shoot borer, Conogethes punctiferalis (Guenée) (Lepidoptera: Crambidae) in guava in India

Treatments

Pre-treatment

% fruit damage

Post treatment (days after 4 releases)**

7

14

21

Pooled mean

T. chilonis—1000 parasitized eggs/tree

0.80 ± 0.37a

5.20 ± 0.37b

5.80 ± 0.37c

6.40 ± 0.40bc

5.80 ± 0.24c

T. chilonis—1500 parasitized eggs/tree

0.80 ± 0.37a

4.20 ± 0.20b

5.00 ± 0.32b

5.60 ± 0.40b

4.93 ± 0.23b

T. chilonis—2000 parasitized eggs/tree

0.60 ± 0.24a

3.00 ± 0.32a

3.60 ± 0.40a

4.20 ± 0.49a

3.60 ± 0.25a

C. blackburni—100 adults/tree

1.60 ± 0.68a

7.20 ± 0.37 cd

8.00 ± 0.45e

8.80 ± 0.58d

8.00 ± 0.31e

C. blackburni—150 adults/tree

1.00 ± 0.32a

6.60 ± 0.51 cd

7.60 ± 0.24de

8.20 ± 0.49d

7.47 ± 0.29de

C. blackburni—200 adults/tree

0.80 ± 0.37a

6.40 ± 0.24c

6.80 ± 0.37d

7.60 ± 0.51 cd

6.93 ± 0.25d

Untreated control

1.20 ± 0.37a

7.80 ± 0.37d

9.80 ± 0.37f

11.20 ± 0.58e

9.60 ± 0.45f

F value

0.40

22.92

38.30

20.71

75.09

Df

6.24

6.24

6.24

6.24

6.72

P value

0.8716

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

  1. *Mean (± SE) of 5 replications; **4 releases at weekly intervals; Data were subjected to square root transformation and original values are given; Means followed by different letters, (p < 0.05) within column differ significantly