TABLE 2.
Potential yield losses calculated from Brown and Sykes (1983) formula using PCN cyst and egg data.
| Sub-county | Mean number of cysts* | Mean cyst fertility (eggs/cyst)* | Mean cyst viability (%) | Mean soil infectivity (viable egg/g soil) | Estimated mean yield loss (t/ha) |
| Kinangop (n = 21) | 215 ± 64.9 | 147.3 ± 7.6 | 77 | 158.5 | 21.8 |
| Kipipiri (n = 15) | 98 ± 34.9 | 183.4 ± 13.9 | 88 | 90.7 | 12.5 |
| Ol’Joro Orok (n = 15) | 48 ± 21.3 | 180.6 ± 13.1 | 82 | 42.3 | 5.8 |
| Ol’Kalou (n = 20) | 52 ± 31.6 | 127.6 ± 13.4 | 79 | 30.6 | 4.2 |
| Ndaragua (n = 15) | 46 ± 40.0 | 143.5 ± 22.9 | 67 | 37.3 | 5.1 |
*Values expressed as mean ± SE; Mean number of cysts recovered from 200 g soil sample.