Fruit flies have been a big problem this year in many crops across California. Vince Arellano, Environmental Scientist, with the California Department of Food and Agriculture, presented about the California-quarantined oriental fruit fly (Bactrocera dorsalis, detected in Sacramento Co. on September 12, 2023) and its threat to vineyards. Damage occurs when the female lays her eggs inside fruit, which then hatch into maggots. Note that any sour rot occurring locally this vintage was caused by Drosophila fruit flies. Photo sourced from Joint FAO/IAEA Programme.