Second and third generation. To determine if treatment is needed for this generation, careful trap and fruit monitoring is essential. If treatment is needed use the guidelines below to determine the best time to spray. In orchards treated with insecticides, the need and timing for treatment is influenced by the codling moth pressure in the orchard, which can be determined by trap catches. Hang traps in the orchard soon after bud break, on the southeast side of the tree, about 6 to 7 feet high with one trap every 10 acres and at least two traps per orchard.
Service traps one to two times a week and replace lures according to the manufacturers directions.
When using pheromone traps, keep in mind the many factors, such as tree size, trap density, type of trap, trap placement, brand of pheromone, as well as climatic conditions, that can affect trap counts . Pheromone traps, in conjunction with degree-days and sunset temperatures, are used to determine egg hatch and proper spray timing. The most effective spray timing for each generation is outlined below. Codling moth has two to four generations each season. Continue to monitor the generations with traps and accumulate degree-days until the crop is harvested or populations decline below damaging levels in September.