Table 4.
Distribution of 220 virus-positive leaf samples from major yam-growing areas in Cameroon according to symptom types and three viruses tested in 2014 and 2016
| Symptoms associated with leaf samples | Virus-positive samples per symptom type | ||||
|---|---|---|---|---|---|
| YMV | YMMV | YMV + YMMV | CMV | aTotal | |
| Curling (Cu) | 8 | 1 | 0 | 0 | 9 |
| Leaf bleaching (Lb) | 3 | 0 | 0 | 0 | 3 |
| Leaf distortion (Ld) | 6 | 4 | 1 | 0 | 11 |
| Mosaic (M) | 146 | 8 | 7 | 0 | 161 |
| Mottling (Mo) | 5 | 3 | 0 | 0 | 8 |
| Shoe-stringing (Sh) | 5 | 1 | 0 | 0 | 6 |
| Vein-banding (Vb) | 1 | 0 | 0 | 0 | 1 |
| Total | 174 | 17 | 8 | 0 | 199 |
| Asymptomatic samples | 15 | 6 | 0 | 0 | 21 |
| Overall total | 189 | 23 | 8 | 0 | 220 |
aTotal number of virus-positives samples per symptom type