Table 3 Effect of compost and biocontrol agents on potato plant cv. Sponta infected with root-knot nematode Meloidogyne incognita under field conditions after two months of planting and at harvest
Treatments | After two months | At harvest | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Initial population/250Â g soil | No. of J2/250Â g soil | % Reduction | No. of J2/5Â g roots | No. of galls/5Â g roots | No. of egg masses/5Â g roots | Final population/250Â g soil | % Reduction | No. of J2/5Â g roots | No. of galls/5Â g roots | No. of egg masses/5Â g roots | Total eggs/5Â g roots | ||||||||
No | % Reduction | No | % Reduction | No | % Reduction | No | % Reduction | No | % Reduction | No | % Reduction | No | % Reduction | ||||||
T1 | 559 a | 455 a | – | 110 a | – | 311 a | – | 158 a | – | 1593 a | – | 221 a | – | 584 a | – | 325a | – | 153725a | – |
T2 | 557 a | 153 f | 66.3 | 70Â cd | 36.4 | 98 d | 68.5 | 60 c | 62.1 | 534 e | 66.4 | 117 c | 47.1 | 200 f | 65.8 | 200 d | 38.5 | 81,800 c | 46.8 |
T3 | 555 a | 204 d | 54.8 | 57 d | 48.1 | 101 d | 67.5 | 54 c | 65.8 | 714 c | 54.9 | 133 b | 39.8 | 250 e | 57.2 | 131 e | 59.7 | 54103d | 64.8 |
T4 | 551 a | 250 c | 44.3 | 93 b | 15.5 | 215 b | 30.9 | 98 b | 37.9 | 839 b | 46.6 | 137 b | 38.8 | 471 b | 19.4 | 269 c | 17.2 | 108945b | 29.1 |
T5 | 550 a | 192 e | 57.1 | 25 e | 77.3 | 87 d | 72.0 | 61 c | 61.3 | 648 d | 58.7 | 59 f | 73.3 | 161Â g | 72.4 | 63Â g | 80.6 | 28078f | 81.7 |
T6 | 562 a | 360 b | 21.3 | 72 c | 34.5 | 93 d | 70.1 | 60 c | 62.0 | 725 c | 54.7 | 100 d | 54.8 | 175Â g | 70.0 | 106 f | 67.4 | 43990e | 71.4 |
T7 | 560 a | 94Â h | 79.4 | 23 e | 79.1 | 125 c | 50.8 | 55 c | 65.0 | 349Â g | 77.9 | 49 f | 77.8 | 286 d | 51.0 | 110 f | 66.2 | 47300e | 69.1 |
T8 | 553 a | 110Â g | 75.6 | 58 d | 47.3 | 227 b | 27.0 | 109 d | 31.0 | 395 f | 75.4 | 82 e | 62.9 | 334 c | 42.8 | 106 f | 67.4 | 44838e | 70.8 |