Bacteria Reduce Greenhouse Whitefly Pests on Tomatoes
New study shows Bacillus strains effectively combat whiteflies while bolstering plant defenses and nutrient levels.
Updated on Oct. 27, 2026 in Botany
Researchers have identified that Bacillus velezensis and Bacillus licheniformis strains significantly reduce greenhouse whitefly populations on tomato plants. The treatment also enhances the natural defense responses and nutrient uptake of the plants.
Why it matters
The findings offer a promising alternative to synthetic chemical pesticides, which are often linked to environmental damage and risks to human health. By utilizing beneficial bacteria, farmers may eventually reduce reliance on traditional chemical treatments.
Bacterial treatments induced peroxidase activity levels of 44.98 compared to 25.90 in control plants, alongside the production of 129.91 mg/L of surfactin and 370.55 mg/L of iturin by B. velezensis UTB96. B. licheniformis also produced 188.83 mg/L of fengycin.
The players
Bacillus velezensis
This is a species of bacteria being researched for its potential as a biological control agent to manage agricultural pests.
Bacillus licheniformis
This bacterium is being evaluated for its ability to produce antifungal lipopeptides and protect plants from insect damage.
The details
The bacterial strains stimulate tomato plants to produce higher concentrations of anthocyanins and phenolics, which act as natural defenses against pests. Furthermore, the application of these specific Bacillus strains improves the plant's ability to absorb essential nutrients including nitrogen, phosphorus, potassium, and calcium.
Timeline
The research article detailing these findings was published on October 27, 2026.
The Big Picture
This study contributes new evidence to the development of integrated pest management (IPM) biological control agents. The findings extend the current catalog of microbial solutions available for sustainable crop protection by proving the dual benefits of pest suppression and plant health enhancement.
This research could lead to the commercialization of new, organic-friendly bio-pesticides that improve crop yields for commercial farmers. These treatments may eventually provide a viable method for home and professional gardeners to manage greenhouse pests without harsh chemical exposure.
The takeaway
Beneficial soil bacteria like Bacillus strains can offer a dual-action solution for crop protection by killing pests and strengthening plant resilience. Implementing these biological methods may allow for a more sustainable approach to food production by reducing dependence on chemical applications.
Further reading
For more on plant interactions with microbes, see our Botany section.
