Table 1:
The reaction of Rotylenchulus reniformis to the differential hosts (Rao and Ganguly, 1996).
| Castor | Cotton | Cowpea | Mustard | |
|---|---|---|---|---|
| Race 2 | + | + | + | − |
| Race 4 | + | + | + | + |
Table 2:
NC differential host test (Hartman and Sasser, 1985).
| Tabaco | Cotton | Pepper | Tomato | Groundnut | |
|---|---|---|---|---|---|
| Race 1 | − | − | + | + | − |
| Race 2 | + | − | + | + | − |
| Race 3 | − | + | + | + | − |
| Race 4 | + | + | + | + | − |
| Race 5 | − | − | − | + | − |
| Race 6 | + | − | − | + | − |
Figure 1:
Perineal pattern of Meloidogyne incognita.
Figure 2:
Rotylenchulus reniformis. Pre-adult female individual (A) and male individual (B).
Figure 3:
SEM photomicrographs of Rotylenchulus reniformis: (A) immature female, (B) anterior region of immature female, (C) adult male, and (D) tail region of male. SEM, scanning electron microscope.
Figure 4:
Rotylenchulus reniformis infecting root of castor (A), cowpea (B), and cotton (C,D) stained with acid fuchsin.
Table 3:
Identification of races of Rotylenchulus reniformis infecting host differential plants.
| Host differential plants/number of nematodes | Soil + root (males/immature females/larvae) | Female/egg mass |
|---|---|---|
| Cowpea | 1,700/470/1,600 | 401/195 |
| Cotton | 760/380/540 | 270/88 |
| Castor | 840/380/870 | 387/208 |
| Mustard | – | – |
Figure 5:
Reproduction of Rotylenchulus reniformis infecting cowpea, castor, and cotton. Error bars represent standard deviations. Different letters indicate significant differences at P ≤ 0.05 according to Tukey's test (n = 5).
Table 4:
Identification of races of Meloidogyne incognita according to final population (Rf), 0–5 egg mass reaction scale, root-gall index (0–10).
| Tobacco Mean ± SE** | Cotton Mean ± SE | Tomato Mean ± SE | Pepper Mean ± SE | Groundnut Mean ± SE | |
|---|---|---|---|---|---|
| Soil + root final population (Rf) | 0.6 ± 0.13 bc* | 0.62 ± 0.22 bc | 2.9 ± 0.86 a | 2.3 ± 0.29 ab | 0 ± 0 c |
| Egg masses | 2.4 ± 0.2 c | 2.6 ± 0.2 bc | 3.6 ± 0.2 a | 3.4 ± 0.2 ab | 0 ± 0 d |
| Root-Gall Index | 1.2 ± 0.2 b | 1.2 ± 0.2 b | 4.2 ± 0.2 a | 3.4 ± 0.2 a | 0 ± 0 c |
Figure 6:
Population density of Rotylenchulus reniformis and Meloidogyne incognita on bananas in the greenhouse.