Navel Orangeworms belies its name and feeds on a wide variety of fruits and nuts including: almonds, figs, pomegranates and walnuts. It is the most damaging caterpillar in pistachios.
Orchard sanitation is an essential part of managing this pest. Removing unharvested nuts and destroying nuts left on the soil surface are keys to control. In addition, sprays of Bacillus thurengiensis kurstaki and Spinosad can be used when larvae are present.Adult moths are a silvery gray color with irregularly thin to wide, wavy lines on the forewings, and a snout-like projection on the front of their heads. Their all over length is anywhere from 9.7 to 10.9 mm. The larvae are reddish orange to cream colored and 13 to 19 mm long.
For more information on controlling these pests, please see our Caterpillars and Moths Control page.Photo courtesy of Citrus Entomology University of California Kearney Agricultural Center