ArticleBMC public health2026
Post-harvest losses of perishable vegetables and their contribution to household dietary gaps in Kamonyi District, Rwanda.
Article in BMC public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundPost-harvest losses (PHL) of perishable vegetables have been a major problem that threatens food security and nutritional outcomes in sub- Saharan Africa. Smallholder farmers also incur heavy losses during the peak harvesting seasons in Rwanda, especially of fruits with high perishability. This research paper examined the extent of post-harvest losses of tomatoes, leafy greens, and carrots, as well as the role played by these foods in the household dietary deficiencies of Kamonyi District.
methodsMeasures: The cross-sectional study was done in all of the 12 sectors of the Kamonyi District in the period between November 2024 and January 2026. The Yamane formula was used to do a systematic sampling of 384 smallholder vegetable farmers. The data were collected on physical loss data and nutritional quality deterioration data, household dietary diversity scores (HDDS), and vitamin A/C intake data. A controlled experiment was used to test the effectiveness of aloe vera-honey coating as an effective preservation.
resultsIt found out that tomatoes, leafy greens, and carrots had an average of 34.7 percent, 28.3 percent, and 19.6 percent post-harvest losses, respectively. During the high harvest period, tomato prices decreased by 67.2 percent, and the field damage amounted to 18.4 percent. The loss-making families of high PHL (>30) had a significantly lower HDDS (4.2 ± 1.3) in comparison with loss-making families of low (<15) PHL (6.8± 1.1) (p < 0.001). The deficiency in the level of vitamin A intake was established at 62.4 percent in high PHL households compared to 31.2 percent of low PHL households. Aloe vera-honey was applied to vegetable tomatoes to extend shelf life by 158 per cent (18.6 days) and preserve 89.3 per cent of vitamin C in the samples (52.1 in the untreated samples).
conclusionNutritional shortages and deficiencies in dietary habits are both significant contributors in the Kamonyi District because post-harvest losses are significant. Low costs of preservation techniques, such as coating with aloe vera-honey, have a lot of potential in terms of loss reduction and improvement of the nutritional security of small-holding farming families.
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