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Figure from:Assessing the sweetpotato virus disease and its associated vectors in northwestern Tanzania and central Uganda

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Figure 2. Sweetpotato virus disease incidence in different sweetpotato cultivars surveyed in Mwanza region of Tanzania.

Figure 2 Sweetpotato virus disease incidence in different sweetpotato cultivars surveyed in Mwanza region of Tanzania.

Related Figures (9)

Figure 1. A sketch map of Tanzania (Lake Victoria basin) and Uganda (central) showing sites sampled for occurrence of SPVD and assessment of virus vector abundances.
Figure 1. A sketch map of Tanzania (Lake Victoria basin) and Uganda (central) showing sites sampled for occurrence of SPVD and assessment of virus vector abundances.
+ Standard error of each mean. Mean followed by the same letter are not statistically different at the 0.05 level of significance. Table 1. SPVD severity, incidence and vector population at different sweetpotato growing location: in the lake victoria basin of Tanzania.
+ Standard error of each mean. Mean followed by the same letter are not statistically different at the 0.05 level of significance. Table 1. SPVD severity, incidence and vector population at different sweetpotato growing location: in the lake victoria basin of Tanzania.
Figure 3. Sweetpotato virus disease incidence in different sweetpotato cultivars surveyed in Kagera region of Tanzania.
Figure 3. Sweetpotato virus disease incidence in different sweetpotato cultivars surveyed in Kagera region of Tanzania.
°SE is the standard error of each mean. Table 2. Sweetpotato virus disease incidence, severity and its associated whitefly and aphid vector population in Central Uganda.
°SE is the standard error of each mean. Table 2. Sweetpotato virus disease incidence, severity and its associated whitefly and aphid vector population in Central Uganda.
*Means followed by the same letters are not statistically significant at the 0.05 level. Table 3. Mean (+ SE) SPVD symptom severity in different sweetpotato cultivars surveyed in the Lake Victoria basin of Tanzania
*Means followed by the same letters are not statistically significant at the 0.05 level. Table 3. Mean (+ SE) SPVD symptom severity in different sweetpotato cultivars surveyed in the Lake Victoria basin of Tanzania
Figure 4. SPVD-affected sweetpotato plants in Mwanza region (a) chlorotic blotches, mosaic and leaf mottle on cultivar SPNO at Nyakasanga, (b) A close-up of SPVD-infected plant cultivar SPNO showing mosaic, vein clearing and slight leaf distortion, (c) Severe veinal chlorosis on SPVD-affected sweetpotato cultivar Mafuta at Nyakasanga, (d) Severe mosaic, stunting growth and leaf purple on sweetpotato cultivar Jewell a Mwasongwe, (e) Severe upward leaf curl and mosaic symptoms on sweetpotato cultivar 1990.14.11 at Nyakasanga and (f) Extreme vein clearing and mosaic on sweetpotato cultivar Jitihada.
Figure 4. SPVD-affected sweetpotato plants in Mwanza region (a) chlorotic blotches, mosaic and leaf mottle on cultivar SPNO at Nyakasanga, (b) A close-up of SPVD-infected plant cultivar SPNO showing mosaic, vein clearing and slight leaf distortion, (c) Severe veinal chlorosis on SPVD-affected sweetpotato cultivar Mafuta at Nyakasanga, (d) Severe mosaic, stunting growth and leaf purple on sweetpotato cultivar Jewell a Mwasongwe, (e) Severe upward leaf curl and mosaic symptoms on sweetpotato cultivar 1990.14.11 at Nyakasanga and (f) Extreme vein clearing and mosaic on sweetpotato cultivar Jitihada.
Key: Visual assessment of colour intensity as - = no apparent colour change, + = weak purple colour, ++++ = very high purple colour intensity. Table 4. NCM-ELISA-based analysis results of sweetpotato field samples collected from Mwanza and Kagera regions of Tanzanie
Key: Visual assessment of colour intensity as - = no apparent colour change, + = weak purple colour, ++++ = very high purple colour intensity. Table 4. NCM-ELISA-based analysis results of sweetpotato field samples collected from Mwanza and Kagera regions of Tanzanie
Figure 5. SPVD symptoms in farmer’s fields on sweetpotato in Luwero and Wakiso districts of Central Uganda (a), leaf yellowing, narrowing and mosaic on sweetpotato cv. Chipapali, (b) leaf yellowing and mottling on sweetpotato cv Dimbuka, (c) Vein clearing and chlorotic blotches on sweetpotato leaf of cv. (d) Dimbuka and excessive chlorotic blotches and spots observed on affected sweetpotato cv. Dimbuka.
Figure 5. SPVD symptoms in farmer’s fields on sweetpotato in Luwero and Wakiso districts of Central Uganda (a), leaf yellowing, narrowing and mosaic on sweetpotato cv. Chipapali, (b) leaf yellowing and mottling on sweetpotato cv Dimbuka, (c) Vein clearing and chlorotic blotches on sweetpotato leaf of cv. (d) Dimbuka and excessive chlorotic blotches and spots observed on affected sweetpotato cv. Dimbuka.
Key: Visual assessment of colour intensity as - = no apparent colour change, + = weak purple colour, ++++ = very high purple colour intensity. The ELISA results should be processed and be presented in a simple easy to follow way. The results as they are now are raw. Table 5. NCM-ELISA-based analysis results of sweetpotato field samples collected from Luwero and Wakiso in central Uganda
Key: Visual assessment of colour intensity as - = no apparent colour change, + = weak purple colour, ++++ = very high purple colour intensity. The ELISA results should be processed and be presented in a simple easy to follow way. The results as they are now are raw. Table 5. NCM-ELISA-based analysis results of sweetpotato field samples collected from Luwero and Wakiso in central Uganda
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