Table 1.
CBSD incidences and yield for PRG baseline fields with local varieties − Chato.
| Farmer | Plant total incidencea | Plant shoot incidenceb | Plant root incidencec | Root incidenced | Unusable root incidencee | Yieldf t/ha |
|---|---|---|---|---|---|---|
| Ayubu Mtangi | 61.0 | 58.0 | 8.0 | 3.7 | 0.6 | 8.9 |
| Bryson Charles | 100 | 100 | 25.0 | 11.5 | 3.3 | 9.2 |
| Bujumbura Daideli | 97.0 | 96.0 | 38.0 | 16.0 | 6.4 | 9.5 |
| Ndebile Balitazari | 90.0 | 90.0 | 14.0 | 11.3 | 4.9 | 1.1 |
| Helena Segera | 96.0 | 93.0 | 14.0 | 3.8 | 2.2 | 5.8 |
| James Mtangi | 96.0 | 96.0 | 17.0 | 8.7 | 2.3 | 3.2 |
| John Bilingi | 97.0 | 97.0 | 14.0 | 2.5 | 2.2 | 3.8 |
| Helena Munyankore | 98.0 | 94.0 | 27.0 | 13.8 | 12.5 | 2.2 |
| Ester Simon | 97.0 | 97.0 | 4.0 | 1.9 | 1.9 | 1.4 |
| Priscus Severin | 98.0 | 93.0 | 35.0 | 14.2 | 9.8 | 7.6 |
| Overall Mean | 93.0 | 91.4 | 19.5 | 8.7 | 4.5 | 5.2 |
a
Plant total incidence − Percentage of plants with CBSD symptoms in either shoots or roots.
b
Plant shoot incidence − Percentage of plants with CBSD symptoms in shoots.
c
Plant root incidence − Percentage of plants with CBSD symptoms in roots.
d
Root incidence − Percentage of roots with CBSD symptoms.
e
Unusable root incidence − Percentage of roots with at least one cut (out of five) with CBSD severity score 3 or more.
f
Yield − Yield of tuberous roots harvested from five blocks of 20 plants per farmer’s field, measured in t/ha.