Expression of anthocyanins in a citrus genotype reduces host preference and performance by a phytopathogen vector

Our findings indicate that anthocyanin overexpression in citrus reduces D. citri host preference and negatively impacts psyllid survival. These effects appear to be primarily mediated through visual deterrence and direct toxicity rather than olfactory cues. The genetic modification of citrus to overproduce anthocyanins presents a promising strategy for HLB management by reducing vector populations and limiting pathogen transmission. Further research is needed to assess long-term stability, agronomic feasibility, and integration with existing pest management strategies. © 2025 Society of Chemical Industry.