Evaluating insecticide coverage and determining its effect on the duration of control for navel orangeworm (Amyelois transitella Walker) (Lepidoptera: Pyralidae) in California almonds

BACKGROUND Insecticide application is essential to control navel orangeworm ( Amyelois transitella ) in California almonds ( Prunus dulcis ), but coverage is challenging. Laboratory and field trials were conducted from 2014 to 2017 to quantify insecticide deposition and duration of control. RESULTS In the laboratory for filter paper, photolysis reduced the contact toxicity of bifenthrin, and its half‐life was 6.2 days. For chlorantraniliprole...