Usually orange tortrix does not appear in apple trees until June when eggs from the first summer generation are laid. Examine 10 trees of each variety in each block for 4 minutes each. Various pyrethroids are also registered for orange tortrix control in California, but are not recommended because they can cause severe mite problems and are not worth the control provided for orange tortrix. Most effective when larvae are small and actively feeding. Make 2 applications 7-10 days apart in warm, dry weather.
Good coverage is important.
Do not apply within this many days of harvest. Permit required from county agricultural commissioner for purchase or use. The Regents of the University of California. All rights reserved. For noncommercial purposes only, any Web site may link directly to this page or photo file.