Ugandan Experts Warn Against Tomato Pesticide Misuse Linked to Cancer and Infertility

Agricultural authorities in Uganda have raised serious concerns over the escalating misuse of pesticides and post-harvest chemicals on fresh produce, particularly tomatoes. Experts warn that chemical residues left on vegetables pose severe, long-term health risks to consumers, including cancer, reproductive organ failure, and infertility.

The Ministry of Agriculture, Animal Industry and Fisheries (MAAIF), alongside the Centre for Agriculture and Bioscience International (CABI) and Kampala Capital City Authority (KCCA), has rolled out the second phase of the “Wash Well, Eat Well, Stay Healthy” campaign. The initiative aims to educate farmers, traders, and consumers on responsible agrochemical management.

According to John Mwanja, the Assistant Commissioner for Agro-Chemicals at MAAIF, some farmers and traders engage in dangerous post-harvest practices. A primary concern is the improper application of Mancozeb—a fungicide strictly meant for growing crops in the field—directly onto harvested tomatoes to artificially preserve their glossy appearance.

Experts stress that simple household washing is often insufficient to remove these toxins. David Mutende, a senior chemist at the Government Analytical Laboratory, explained that routine testing shows deep chemical absorption within plant tissues, meaning residues persist despite washing.

Survey findings released during the campaign revealed that consumer habits heavily drive the crisis, with half of surveyed buyers prioritizing glossy tomatoes over safety. On the production side, many farmers and traders prioritize extended shelf life over public health, frequently ignoring mandatory pre-harvest safety intervals.

To address these challenges, the inter-agency task force is conducting direct market sensitization across major trading hubs in Kampala and rolling out specialized training modules in central region districts. Authorities have also called for improved market infrastructure, including cold storage facilities, and are promoting Integrated Pest Management as a safer alternative. Officials have warned that individuals violating pesticide handling regulations face prosecution and commercial bans.

Read more details in the Daily Monitor report.