Table 5 Effect of bio-control agents, plant extracts, and citric acid as foliar spray against bacterial soften potato tubers disease (as weight losses %) under storage conditions
Treatments | Softening tubers (weight losses%) at weeks | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | |
Bacillus subtilis | 0d* | 4.7c | 4.7c | 4.7e | 4.7 h | 4.7i | 4.7i | 4.7j | 4.7i | 21.0d | 21.0d | 30.5c |
Bacillus pumilus | 0d | 0d | 0e | 0e | 0i | 0j | 0j | 0 k | 0j | 0j | 0j | 17.0 h |
Trichoderma harzianum | 0d | 0d | 0e | 6.9c | 6.9f | 6.9 h | 6.9 h | 6.9i | 6.9 h | 6.9i | 6.9i | 18.8f |
Trichoderma virens | 0d | 0d | 6.3b | 6.3d | 6.3g | 9.5e | 9.5e | 9.5g | 14.4f | 18.1e | 18.1e | 25.4e |
Lantana | 0d | 0d | 0e | 0f | 0i | 0j | 9.3e | 13.2e | 18.1d | 18.1e | 18.1e | 18.1g |
Lemongrass | 0d | 0d | 0e | 0f | 8.8d | 8.8f | 8.8f | 8.8 h | 8.8g | 8.8 h | 8.8 h | 8.8j |
Olive cake | 0d | 0d | 0e | 0f | 12.6c | 12.6d | 15.1d | 23.6c | 23.6c | 23.6c | 23.6c | 28.1d |
Citric acid | 0d | 0d | 0e | 0f | 8.1e | 8.1g | 8.1g | 10.9f | 14.3f | 14.3g | 14.3g | 14.3i |
PDB medium only | 4.3c | 4.3c | 4.3d | 14.3a | 14.3b | 14.3c | 16.2c | 16.2d | 16.2e | 16.2f | 16.2f | 18.4g |
NB medium only | 4.9b | 4.9b | 4.9c | 11.2b | 19.1a | 31.9a | 31.9a | 36.5a | 38.6a | 38.6a | 40.4b | 40.4b |
Control | 9.8a | 9.8a | 11.6a | 14.6a | 19.2a | 22.5b | 25.5b | 28.8b | 31.6b | 35.3b | 42.0a | 48.8a |