Oil used alone provides only partial control of peach twig borer and is primarily aimed at San Jose scale and mite eggs. Make this oil application in conjunction with a treatment of Bacillus thuringiensis applied at bloom. Treatments can also be timed by examining larval emergence from hibernacula. In years when peach twig borer emergence is extended, a third application has been shown to give excellent control. Compatible with fungicide sprays, and can be tank mixed with them.
Good coverage is essential.
Fly material on at a height of about 20 ft over the canopy using appropriate nozzles to allow better deposition on the tree tops. Precede this treatment with an oil spray during the delayed dormant season to control San Jose scale and European red mite eggs. Apply in top one-third of canopy when first moths are trapped. Reapply according to manufacturer's recommendation. To avoid development of insect resistance, do not treat successive generations of the same pest with the same product.