More than 5 adult flies per day per panel trap 2. Olive crop is at risk hardened pit stage 4. Flies are beginning to become sexually active as evidenced by preference to pheromone lure sticky traps vs. plain yellow traps. First treatment is usually June in Spain with subsequent aerial spraying in September. Occasionally there is a need for a July spraying depending on weather and other conditions.
Ammonia is more specific to olive fly and pheromone is even more specific.
Yellow sticky panel trap alone. Catches many non-target and possibly beneficial insects Traps become saturated with insects and debris 2. High trap costs 4. A mix of protein hydrolyzate or pheromone such as microencapsulated Spiroketal and insecticide is sprayed in a two square foot area of each tree on the south-facing side by a worker with a small inexpensive hand sprayer. One worker can cover 10 to 15 acres in a day and each application uses only about 1.5ml of spray.