Insect Management on Desert Produce Crops

Abstract

Western flower thrips (WFT), Frankliniella occidentalis, have emerged as serious pests of leafy vegetables in desert production systems, particularly lettuce and spinach. Their feeding causes cosmetic damage that reduces marketability, while their presence in harvested products poses contamination concerns. WFT are difficult to control due to their rapid development, cryptic feeding habits, and ability to disperse from surrounding vegetation. Management relies on regular field monitoring, timely insecticide applications at established action thresholds, and limited cultural strategies such as avoiding nearby infested fields and using overhead irrigation. Although natural enemies are present, they offer minimal suppression in desert conditions.