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Marigolds deter carrot rust flies and carrot psyllids.—Heather Bien, The Spruce, 24 Apr. 2026 Last year, the state’s Department of Food and Agriculture cut down 30% of the nursery’s citrus trees on concerns they were infested with Asian citrus psyllid, a sap-sucking bug that transmits a devastating citrus disease.—Pat Maio, Oc Register, 17 Apr. 2026 Citrus greening disease is caused by a bacterial infection spread by the Asian citrus psyllid.—Tom Hudson, Sun Sentinel, 24 Mar. 2026 French marigolds also specifically help eliminate carrot rust fly, carrot psyllid, and aphids.—Haniya Rae, Martha Stewart, 12 Mar. 2026 See All Example Sentences for psyllid