Table 4 Effect of bio-control agents and aqueous plant extracts as soil treatment against bacterial soften potato tubers disease (as weight losses %) under storage conditions

Bacillus subtilis

0c*

0d

0e

0e

9.3e

9.3e

9.3e

9.3e

9.3g

9.3i

9.3 h

9.3 h

Bacillus pumilus

0c

0d

0e

0f

9.4e

9.4e

9.4e

9.4e

28.3b

28.3c

28.3c

28.3d

Trichoderma harzianum

0c

6.5b

6.5d

6.5d

11.2bc

11.2bc

11.2bc

16.4b

27.2c

27.2d

27.2d

27.2e

Trichoderma virens

0c

0d

7.7c

7.7c

11.6b

11.6b

11.6b

17.1b

17.1e

17.1g

17.1f

31.8c

Lantana

0c

0d

0e

0e

10.8bc

10.8bc

10.8bc

11.5c

11.5f

11.5 h

11.5g

21.1f

Lemongrass

0c

0d

0e

0e

11.3bc

11.3bc

11.3bc

28.1a

31.5a

31.5b

31.5b

40.2b

Olive cake

0c

6.9b

6.9 cd

6.9 cd

6.9f

6.9f

6.9f

12.1c

12.1f

12.1 h

12.1g

21.5f

PDB medium only

3.3b

3.3c

9.8b

9.8b

9.8de

9.8de

9.8de

11.2 cd

17.8e

21.6f

27.3d

27.3e

NB medium only

2.6b

2.6c

7.6c

7.6c

10.5 cd

10.5 cd

10.5 cd

10.5d

22.3d

23.4e

25.2e

40.5b

Control

9.8a

9.8a

11.6a

14.6a

19.2a

22.5a

25.5a

28.8a

31.6a

35.3a

42.0a

48.8a