Pre-harvest control of codling moth

David Epstein, MSU IPM Program, Larry Gut and John Wise, Michigan State University Extension, Department of Entomology - August 21, 2007

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

A codling moth model developed by Dr. Carlos Garcia-Salazar, MSUE, predicts third-generation codling moth flight in Southwest Michigan started around August 16. Growers should continue monitoring on-farm traps to measure adult activity that can be used in conjunction with weather information (GDD) to determine if third generation activity warrants control treatments, and to best time treatment where needed. A particular concern with third-generation codling moth is that eggs laid directly on apples at this time of year can hatch in harvest bins or the packinghouse. Table 1 identifies codling moth control materials and label information relevant to late season spraying. On farms where summer generation obliquebanded leafroller larvae may be problematic, growers should consider the use of materials with efficacy on both codling moth and obliquebanded leafroller.

Table 1. Codling moth controls.

Compound trade name	Life-stage activity	Total allowable product/acre/yr*	Pre-harvest interval*	Re-entry interval*
Guthion 50WP**	eggs, larvae, adults	8 lbs	14 day	14 day
Danitol 2.4EC	eggs, larvae, adults	42.6 oz	14 day	24 hr
Rimon 0.83EC	eggs, larvae	150 oz	14 day	14 day
Intrepid 2F	eggs, larvae	64 oz	14 day	4 hr
Proclaim	larvae	14.4 oz	14 day	48 hr
Imidan 70WP	eggs, larvae, adults	30 lbs	7 day	24 hr
Baythroid XL	eggs, larvae, adults	5.6 oz	7 day	12 hr
SpinTor 2SC	eggs, larvae	29 oz	7 day	12 hr
Entrust 80WP	eggs, larvae	9 oz	7 day	12 hr
Assail 30SG	eggs, larvae, adults	32 oz	7 day	12 hr
Clutch 50WDG	eggs, larvae, adults	6.4 oz	7 day	12 hr
Sevin	adult, larvae	15 lbs ai	3 day	12 hr
Granulosis virus	larvae		4 hr	4 hr

* for apples only
** 21 day PHI if more than 2 lb rate of Guthion

This article was published by Michigan State University Extension. For more information, visit https://extension.msu.edu. To have a digest of information delivered straight to your email inbox, visit https://extension.msu.edu/newsletters. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464).