Male and female codling moths, Cydia pomonella (Lepidoptera: Tortricidae), are known to be attracted to a three-chemical kairomonal lure consisting of pear ester, acetic acid, and n-butyl sulfide. A controlled-release device based on sachets was developed in the USDA-Temperature Tree Fruit and Vegetable research facility and field tested to demonstrate the effectiveness of this mechanism. This presentation focuses on the method development, highlighted by Dr. Landolt's unorthodox approach to material procurement. We found that acetic acid and n-butyl sulfide can be combined into one device without decreasing trap catches and established the importance of quantifying pear ester release rates. A sachet-based controlled-release system of pear ester, acetic acid, n-butyl sulfide is a cost-effective alternative to a vial and septa controlled-release system and allows for easier quantification of ideal release rates.
