Agricultural researchers investigate plant immunity and pest control methods

Researchers are exploring new biological methods to protect crops from diseases and pests. At Wageningen University & Research, doctoral research has mapped how tomato plants activate defense responses against the fungus Fulvia fulva, which causes leaf spot disease. The study focused on specific receptors, such as Cf-4 and Cf-5, which recognize fungal proteins and trigger immune signals. While both provide similar resistance, Cf-4 triggers a faster response, whereas Cf-5 leads to a more prolonged defense and broader gene activity.

In a separate study, researchers at Rutgers University discovered that the yeast Pichia occidentalis can repel the spotted wing drosophila (Suzuki fruit fly). The yeast, spread by common fruit flies, produces volatile scents that deter the pest and reduce its egg-laying. This discovery could offer a non-lethal management tool for growers of cherries, blueberries, and raspberries, particularly in organic farming where chemical options are limited.