Fig. 1.
Gall formation on rice root by root knot nematode, Meloidogyne sp. (arrow indicated) (A), Immature stages of female of Meloidogyne sp. (B), Mature stage of female and male (C), Female of Meloidogyne sp. with eggmasses (D), Adult of Hirshmanniella sp. (E), and Adult of Helicotylenchus sp. (F).
Table 1.
Average number of plant parasitic nematodes (root samples) in surveyed blocks of rice fields of zone III A region, Bihar. The values of the number of plant parasitic nematodes are the mean of three replicates.
| Meloidogyne sp. | Hirshmanniella sp. | Helicotylenchus sp. | |
|---|---|---|---|
| Sheikhpura | 123.4 | 33.2 | 23.1 |
| Chewara | 103.3 | 16.9 | 26.5 |
| Halsi | 146.6 | 23.1 | 16.6 |
| Ramgarh Chowk | 106.8 | 36.5 | 23.1 |
| Jamui | 46.5 | 33.4 | 36.8 |
| Barhat | 56.6 | 33.4 | 23.6 |
| Munger | 53.2 | 36.9 | 23.4 |
| Tarapur | 116.7 | 16.4 | 36.9 |
| Rajoun | 123.5 | 13.1 | 23.2 |
| Sambhuganj | 103.1 | 16.6 | 16.4 |
| Jagdishpur | 146.9 | 23.4 | 26.8 |
| Shakhund | 76.6 | 13.5 | 23.5 |
| Sabour | 116.8 | 13.6 | 16.4 |
| C. D. | 11.2 | 6.2 | 5.1 |
| SE(m) | 3.8 | 2.1 | 1.7 |
| SE(d) | 5.4 | 3.0 | 2.4 |
| C. V. | 6.5 | 15.7 | 12.4 |
Table 2.
Average number of plant parasitic nematodes (soil samples) in surveyed blocks of rice fields of zone III A region, Bihar. The values of the number of plant-parasitic nematodes are the mean of three replicates.
| Meloidogyne sp. | Hirshmanniella sp. | Helicotylenchus sp. | Hoplolaimus sp. | Tylenchorhynchus sp. | Criconemoides sp. | Xiphinema sp. | Longidorus sp. | Trichodorus sp. | |
|---|---|---|---|---|---|---|---|---|---|
| Sheikhpura | 66.6 | 13.2 | 13.2 | 13.2 | 13.1 | 23.5 | 13.1 | 13.1 | 13.1 |
| Chewara | 83.2 | 16.4 | 13.2 | 23.4 | 23.2 | 33.4 | 23.2 | 23.5 | 23.4 |
| Halsi | 73.5 | 16.7 | 16.4 | 16.6 | 13.4 | 36.2 | 13.4 | 13.4 | 26.6 |
| Ramgarh Chowk | 46.4 | 36.5 | 13.1 | 33.1 | 16.5 | 23.4 | 16.6 | 16.4 | 36.4 |
| Jamui | 76.8 | 16.4 | 16.4 | 13.4 | 26.6 | 33.5 | 33.4 | 13.2 | 16.5 |
| Barhat | 66.7 | 23.4 | 13.6 | 16.8 | 23.4 | 16.8 | 16.7 | 23.2 | 13.2 |
| Munger | 43.1 | 23.6 | 13.4 | 13.5 | 13.2 | 26.4 | 13.9 | 13.4 | 13.4 |
| Tarapur | 63.6 | 33.4 | 23.8 | 16.4 | 23.2 | 26.6 | 16.4 | 33.6 | 13.1 |
| Rajoun | 56.9 | 13.8 | 13.5 | 13.2 | 13.4 | 16.4 | 23.8 | 26.4 | 13.6 |
| Sambhuganj | 53.7 | 16.6 | 16.8 | 23.3 | 23.4 | 33.2 | 23.4 | 16.5 | 23.4 |
| Jagdishpur | 36.8 | 13.4 | 13.4 | 13.5 | 13.5 | 23.4 | 13.1 | 23.6 | 13.5 |
| Shakhund | 46.9 | 36.7 | 23.4 | 16.4 | 26.4 | 13.5 | 16.4 | 13.4 | 16.7 |
| Sabour | 43.2 | 16.3 | 16.5 | 16.7 | 23.1 | 16.9 | 13.1 | 13.8 | 16.8 |
| C. D. | 7.6 | 5.0 | 4.3 | 5.7 | 3.9 | 3.5 | 3.5 | 3.7 | 3.7 |
| SE(m) | 2.6 | 1.7 | 1.4 | 1.9 | 1.3 | 1.2 | 1.2 | 1.2 | 1.2 |
| SE(d) | 3.6 | 2.4 | 2.1 | 2.7 | 1.9 | 1.7 | 1.7 | 1.8 | 1.7 |
| C. V. | 7.7 | 14.1 | 16.3 | 19.1 | 12.0 | 8.5 | 11.4 | 12.0 | 11.8 |
Fig. 2.
Community analysis of plant-parasitic nematodes (root samples). Absolute frequency (A), Relative frequency (B), Absolute density (C), Relative density (D), Prominence value (E) and Relative prominence value (F).
Fig. 3.
Community analysis of plant-parasitic nematodes (soil samples). Absolute frequency (A), Relative frequency (B), Absolute density (C), Relative density (D), Prominence value (E) and Relative prominence value (F).