Table 3.
Studies quantifying the mean number of adults (unless otherwise mentioned) Bemisia tabaci on cassava. General method used was counting the numbers of adults observed on the top five expanded leaves on 30 plants per field and on cassava aged 3–6 months after planting (Sseruwagi et al., 2004). There was some variation in methods between studies.
| Mean count of B. tabaci | Country | Citation |
|---|---|---|
| Max. ~ 30 (method not confirmed) | Ivory Coast | Fargette et al. (1985) |
| Max. ~25 | Ivory Coast | Fargette et al. (1988) |
| Min. ~3 | ||
| Max. ~ 35 intercropped low maize density | ||
| Min. ~ 2. 5 intercropped low maize density (method not confirmed) | ||
| Max. ~ 18 intercropped high maize density | ||
| Min. ~ 2 intercropped high maize density | ||
| Max. 14 Min. 2. 4 | Ivory Coast | Fauquet et al. (1988) |
| Max. ~ 35 | Ivory Coast | Fargette et al. (1990) |
| 4. 6 ± 0. 54 adults and 43 ± 6. 0 nymphs (cassava no mosaic disease symptoms) | Uganda | Gibson et al. (1996) |
| 5. 0 ± 0. 38 adults and 46 ± 6. 4 nymphs (cassava with mosaic disease symptoms) | ||
| Max. 21. 8 | Zambia | Muimba-Kankolongo et al. (1997) |
| Min. 0. 2 | ||
| Max. 3. 7 | Uganda | Legg & Ogwal (1998) |
| Min. 0. 3 | ||
| >3 per shoot (three districts) | Uganda | Otim-Nape et al. (2001) |
| >1 (14 districts) | ||
| between 1-3 (ten districts) | ||
| (One shoot = top four expanded leaves) | ||
| Max ~ 37 | Uganda | Colvin et al. (2004) |
| Min. ~ 1 | ||
| 3-4 instar nymphs = 35. 8 (early season) 59. 1 (late season) resistant cultivars | Uganda | Otim et al. (2006) |
| 3-4 instar nymphs = 17. 2 (early season) 31. 2 (late season) susceptible cultivars | ||
| Nymphs 11. 81 ± 0. 84 improved cultivars | Rwanda | Night et al. (2011) |
| Nymphs 4. 30 ± 0. 12 local cultivars | ||
| 2. 12 ± 0. 17 improved cultivars | ||
| 0. 60 ± 0. 03 local cultivar | ||
| 0. 74 ± 0. 03 inter-cropped cassava | ||
| 0. 94 ± 0. 07 mono-cropped cassava | ||
| Max. 39.2 ± 4.4 cultivar TMS I92/0067 | Uganda | Omongo et al. (2012) |
| Min. 5.4 ±1.7 cultivar Njule Red | ||
| Max. 2. 12 | Zambia | Chikoti et al. (2013) |
| Min. 0. 02 | ||
| Max. 76 | Tanzania | Tajebe et al. (2015) |
| Min. <1 | ||
| Max. 1. 35 | Tanzania | Jeremiah et al. (2015) |
| Min. 0. 1 | ||
| Max. 50 | Malawi | Mbewe et al. (2015) |
| Min. 0 | ||
| Max. 41. 5 | Tanzania | Uzokwe et al. (2016) |
| Min. 1. 0 |