Table 3 Effect of bio-control agents, aqueous plant extracts, and citric acid as soil treatment and/or foliar spray on yield parameters of potato plants in field application
Treatments | Soil treatment | Foliar spray | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Tuber weight/pit | Tuber no./pit | total yield /pit | Tuber weight/pit | Tuber no./pit | Total yield /pit | |||||||
g | Incr.% | No. | Incr.% | g | Incr.% | g | Incr.% | No. | Incr.% | g | Incr.% | |
Bacillus subtilis | 83.7bc* | 17.2 | 7.0ab | 17.2 | 590.5a | 93.2 | 146.3a | 104.0 | 5.3bcd | 26.2 | 753.1ab | 154.9 |
Bacillus pumilus | 101.1ab | 40.4 | 5.2c | 40.4 | 549.3a | 79.7 | 138.7ab | 93.4 | 5.2bcd | 23.8 | 709.1bc | 140.0 |
Trichoderma harzianum | 119.5a | 65.1 | 5.0c | 65.1 | 581.2a | 90.1 | 122.9b | 71.4 | 5.7abc | 35.7 | 669.9bc | 126.8 |
Trichoderma virens | 118.0a | 63.9 | 5.0c | 63.9 | 557.2a | 82.3 | 130.5ab | 82.0 | 6.5a | 54.8 | 822.9a | 178.6 |
Lantana | 83.6bc | 16.7 | 7.2a | 16.7 | 575.3a | 88.2 | 84.7 cd | 18.1 | 5.3bcd | 26.2 | 445.4de | 50.8 |
Lemongrass | 91.4bc | 26.9 | 5.5bc | 26.9 | 506.1ab | 65.6 | 79.7d | 11.2 | 6.7a | 59.5 | 529.4d | 79.2 |
Olive cake | 79.2bc | 10.0 | 5.5bc | 10.0 | 438.4abc | 43.4 | 101.5c | 41.6 | 6.3ab | 50.0 | 641.9c | 117.3 |
Citric acid | NT | 100.3c | 39.9 | 6.7a | 59.5 | 667.6bc | 125.1 | |||||
PDB medium only | 74.6c | 2.6 | 4.5c | 2.6 | 335.8bc | 9.8 | 74.8d | 4.3 | 4.6 cd | 9.5 | 344.3ef | 16.6 |
NB medium only | 80.8bc | 8.8 | 4.5c | 8.8 | 363.5bc | 18.9 | 75.od | 4.6 | 4.7a | 11.9 | 352.6ef | 19.4 |
Control | 72.0c | - | 4.3c | - | 305.7c | - | 71.7d | - | 4.2d | Â | 295.4f | - |