The last week has been unseasonably warm in many parts of Washington, which means we have accumulated significantly more degree days than we had on this date in 2025. In Pasco, WA, we are currently about 100 degree days ahead of where we were in 2025 for codling moth. This means that codling moths are emerging sooner than they did last year, and egg hatch is also moved up. Make sure to check your location on DAS to get updates on codling moth emergence and egg hatch as the weather gets even warmer.
Now is the perfect time to subscribe to DAS! Keep track of pest emergence and see management options as the season progresses. You can use our time machine tool to look back on weather data from the last 5 years, and see how 2026 compares. You can also set up alerts to remind you when key pests are emerging for timely management. Check out our new spray selection tool to see what products can be used for a variety of different tree fruit pests.
We have new subscription options for users subscribed to 5 or more stations. If you are interested in learning more, contact DAS.
Contact
Liesl Oeller
Washington State University
elisabeth.oeller@wsu.edu
Fruit Matters articles may only be republished with prior author permission © Washington State University. Reprint articles with permission must include: Originally published by Washington State Tree Fruit Extension Fruit Matters at treefruit.wsu.edu and a link to the original article.
