University of California IPM Insect Update
Tehama County
6/27/16
| Insect | First Biofix | Second Biofix | Third Biofix | Fourth Biofix | Activity Moths/Day | Avg. Deg. Days / Day | Day Degrees from Biofix |
| Codling Moth | 3/24 | 5/31 | - | - | 7.6 | 27.3 | 677 |
| Oriental Fruit Moth | 3/17 | 5/19 | - | - | 1.4 | 32.5 | 1122 |
| Peach Twig Borer | 4/7 | 5/31 | - | - | 0.69 | 26.3 | 656 |
| Navel Orangeworm Eggs | 4/7 | - | - | - | 0 | 23.0 | 1226 |
| San Jose Scale | 3/21 | - | - | - | - | 25.6 | 1598 |
| Walnut Scale Crawlers | 5/16 | - | - | - | - | - | - |
- Notice the second male Codling moth biofix was 5/31. Our in- orchard weather stations show a 677 Degree day accumulation.
- We have Walnut Husk Fly traps up in the Dairyville area of Tehama County and no flies as of 6/27/16.
- We measured the first walnut scale crawlers 5/16/16 on both Howard and Chandler near Red Bluff. Scale crawlers peaked on 5/31/16 and have declined to near zero as of 6/20 suggesting the end of the first generation.
- Additional Pest management information is available at the UC IPM website including a day degree calculator (http://www.ipm.ucdavis.edu).
Richard P. Buchner and Cyndi K. Gilles
Orchard Advisor & Research Associate
UC Cooperative Extension Tehama County
(530) 527-3101
Thank you for our trap supplies!
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