Pecan Red Kernels and Casebearer Larvae: Spray Schedule Necessity

Red Pecan Kernels = Pecan Nut Casebearer Damage

An older pecan (Carya illinoinensis) dropping nuts with red kernels and a "squished tick" insect inside has pecan nut casebearer (Acrobasis nuxvorella) larvae—the red color is diagnostic.

Why Pecans Need a Spray Schedule

• Casebearer has 2–4 generations/year.
• Single spray fails—timing must match each generation's egg hatch.
• Requires degree-day models or trap monitoring.
• Organic options: Spinosad, Bt, beneficial wasp releases (Trichogramma).

Immediate Action

1. Get your region's pecan spray schedule: Texas A&M (tamu.edu), Oklahoma State, New Mexico State, or local Pecan Growers Association.
2. Sanitation: Remove/destroy all dropped nuts (harbor larvae).
3. Consider newer organic programs: Mating disruption, push-pull, targeted biologicals.

California Context

CA has specific pesticide regulations. Your county Ag Commissioner's office provides legal, current recommendations.

Pecans are high-input trees. Without a schedule, expect wormy nuts. The schedule is your roadmap to clean kernels.