Research conducted on Brazilian organic farms reports that native bee species—not introduced hives—are responsible for effective tomato pollination and fruit development.
By yourNEWS Media Newsroom
A field study published April 16, 2026, in the journal Apidologie has found that wild bee populations, rather than managed hives, are the primary drivers of pollination in open-field organic tomato farming systems. The research, conducted across seven farms in Brazil, evaluated whether introducing managed stingless bee colonies improved crop outcomes and found no measurable benefit.
Scientists compared tomato flowers that were isolated from insect activity with those left accessible to pollinators. Measurements of fruit weight, size and seed content revealed that pollination success was linked to natural environmental factors, including visits from wild bees and wind, rather than the presence of managed hives.
The study specifically examined the role of Melipona quadrifasciata, a stingless bee species commonly introduced into agricultural systems in Brazil. Researchers determined that these bees did not visit tomato flowers during the study period. Genetic analysis of pollen collected from the managed hives confirmed that the bees foraged on non-crop plants instead.
Authors of the study stated that “the presence of M. quadrifasciata hives did not influence fruit quality, indicating that wild bees primarily drove pollination benefits,” concluding that the widespread practice of introducing these hives lacks demonstrated effectiveness for this crop under open-field conditions.
Researchers monitored pollinator activity from July through October 2023, documenting bee visits to both tomato plants and surrounding vegetation. Farmers participating in the study maintained non-crop plants along field margins and between rows, creating a more diverse habitat.
A total of 2,692 bees were recorded during the study, representing 60 distinct species. Of these, eight species were observed exclusively on tomato flowers, 37 were found only on non-crop plants, and 15 species visited both environments. More than 1,200 bees were documented visiting tomato flowers, with the most frequent visitors identified as wild species including Paratrigona lineata, Exomalopsis analis, Exomalopsis auropilosa and several species from the Pseudaugochlora genus.
The findings highlight the role of habitat diversity in sustaining pollinator populations. Researchers noted that the presence of varied flowering plants provided resources for a wide range of bee species, supporting pollination activity. In the study, they wrote that “by offering a diverse range of floral shapes, colors, traits and sizes, non-crop plants support a broader assemblage of pollinator species with complementary functional traits.”
The study suggests that maintaining or enhancing natural habitat within agricultural systems may be more effective than introducing managed pollinators for certain crops. The results contribute to ongoing discussions about pollinator conservation and agricultural productivity.
Additional context cited in coverage of the study points to broader concerns affecting pollinator populations, including the impact of pesticides, monoculture farming practices and environmental stressors. Some analyses have suggested that these factors can increase bee mortality and disrupt foraging patterns, affecting pollination services.
The authors concluded that the use of managed stingless bee hives for open-field tomato production “lacks local, empirical validation,” and emphasized that wild pollinators, along with environmental factors such as wind, are sufficient to support crop pollination under the conditions studied.
The findings underscore the importance of conserving wild pollinator communities as a key component of agricultural systems and long-term food production.
Source: Natural News
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