Sweetpotato virus pathogen-tested planting material of susceptible varieties results in root yield increase in Uganda

Namanda, S.; Mwanga, R.O.M.; Mukasa, Settumba B.; Talengera, David; Musoke, Charles; Kyalo, Gerald; Low, Jan; Ssemakula, G.; Magezi, S.; Ball, Anna‐Marie

doi:10.1016/j.cropro.2019.104851

Cited by 5 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Food and Agricultural Organization Statistical Databases (FAOSTAT, 2019), Uganda is the fifth largest sweetpotato producer after China, Nigeria, Tanzania, and Indonesia. However, Uganda's sweetpotato productivity is constrained by several factors, including sweetpotato virus disease (SPVD), sweetpotato weevils, and vine shortages caused by prolonged dry seasons, among others (Namanda et al, 2019;Okonya et al, 2014). Sweetpotato breeding objectives in the country have over time been largely based on yield enhancement with a strong focus on virus resistance (Yada et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Gender‐differentiated preference for sweetpotato traits and their drivers among smallholder farmers: Implications for breeding

Namirimu,

Okello,

Kizito

et al. 2024

Crop Science

View full text Add to dashboard Cite

To improve sweetpotato (Ipomoea batatas L.) productivity, several improved high‐yielding varieties have been developed by breeders. However, many farmers still grow low‐yielding landraces. Farmers choose varieties to grow based on their preference for the attributes of those varieties. Varietal preferences have been shown to differ between males and females. This study assessed farmer preferences for sweetpotato traits and the factors that drive the choice of most preferred traits. It used a uniquely large data set collected through personal interviews with male and female sweetpotato growers. The study employed multinomial probit regression to examine the drivers of trait preference. It finds a higher preference for production‐oriented traits among farmers in general and especially older ones. This is, however, lower among more educated farmers who mainly prefer risk‐averting traits, and those growing local varieties who mainly prefer quality traits. Hence, alongside production‐oriented traits, other traits critical for the acceptance of new varieties by farmers in their respective contexts should not be ignored.

show abstract

Section: Introductionmentioning

confidence: 99%

Gender‐differentiated preference for sweetpotato traits and their drivers among smallholder farmers: Implications for breeding

Namirimu,

Okello,

Kizito

et al. 2024

Crop Science

View full text Add to dashboard Cite

show abstract

“…However, farmers are unable to realize the crop's yield potential mainly due to pests and diseases (CIP & BMGF, 2016). Namanda et al (2019) reported that repeated use of planting material without checking for quality (certification), including sweetpotato virus disease infections, can result in more than 58% yield losses. Gibson and Kreuze (2015) and Aritua et al (2007) pointed out that overall, the highest disease incidences were encountered in districts in western and central Uganda: the high disease zone, and lowest in eastern and northern Uganda: the low disease zone.…”

Section: Introductionmentioning

confidence: 99%

“…Namanda et al. (2019) reported that repeated use of planting material without checking for quality (certification), including sweetpotato virus disease infections, can result in more than 58% yield losses. Gibson and Kreuze (2015) and Aritua et al.…”

Section: Introductionmentioning

confidence: 99%

“…Production of clean vines via tissue culture and virus indexing, coupled with certification, is one way of ensuring continuous sweetpotato productivity (Adikini et al., 2019; Ball et al., 2016; Fuglie, 2007). Nonetheless, certified seed degenerates with time if recycled (Namanda et al., 2019), hence the need to consistently replenish certified seed.…”

Section: Introductionmentioning

confidence: 99%

“…They indicate common factors such as attitudes, subjective norms, and perceived behavioral control, which originate from the theory of reasoned action and TPB (Ajzen, 1985). This study relied more on TPB because technology proof of concept studies have provided a substantial understanding of product performance, usefulness, and ease of use emphasized in DIT and TAM (Adikini et al., 2015; Donata and Jovanovic, 2016; Namanda et al., 2019). Further, the TPB has been strongly proven to be effective in predicting PI.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Farmers’ purchase intention and willingness to pay for certified sweetpotato seed under different disease pressure zones in Uganda

Musoke,

Kyazze,

Kibwika

et al. 2024

Crop Science

View full text Add to dashboard Cite

The use of certified sweetpotato (Ipomoea batatas) seed (CSS) was reported to unlock the yield potential of the crop leading to an over 80% yield increase. Despite the availability of elements of a formal CSS system, uptake in Uganda has remained dismal. Interdependence between farmer knowledge, perceptions, and purchase behaviors (PBs) is not well understood in a way that could allow the design of meaningful policies and interventions. This study aimed at unveiling factors underlying PB through purchase intention (PI) and willingness to pay (WTP) by interviewing 289 farmers from Omoro and Mpigi districts in Uganda, representing the low and high virus disease pressure zones, respectively. A modified theory of planned behavior (TPB) incorporating awareness as independent and farmer innovativeness as mediating variables expounded the relationships. Data were collected on perceptions, knowledge, innovativeness, and PI using a five‐point Likert scale plus WTP as a price, subjected to descriptive and structural equation modeling analysis. Results indicated significant locational differences in most socioeconomic characteristics. Middle income, CSS information access, and farming experience of 7–30 years conferred more likelihood of high PI. Conversely, high PI, group membership, and being female and middle‐aged increased the likelihood of high WTP. The effects of attitude, perceived behavioral control, and awareness were significant in high disease zone, while subjective norm was significant across disease zones. PI significantly affects WTP in high disease zone (p = 0.000) but its effect is insignificant in low disease zone (p = 0.569). An interplay of socioeconomic, perception, and knowledge attributes influences CSS PB calling for social marketing strategies with location‐specific interventions.

show abstract

Assessing socioeconomic impact of pathogen tested and conventional practice sweet potato production in the highlands of Papua New Guinea

Culas

Pombre

2023

Journal of Agriculture and Food Research

View full text Add to dashboard Cite

Sweetpotato virus pathogen-tested planting material of susceptible varieties results in root yield increase in Uganda

Cited by 5 publications

References 8 publications

Gender‐differentiated preference for sweetpotato traits and their drivers among smallholder farmers: Implications for breeding

Gender‐differentiated preference for sweetpotato traits and their drivers among smallholder farmers: Implications for breeding

Farmers’ purchase intention and willingness to pay for certified sweetpotato seed under different disease pressure zones in Uganda

Assessing socioeconomic impact of pathogen tested and conventional practice sweet potato production in the highlands of Papua New Guinea

Contact Info

Product

Resources

About