University of California IPM Insect Update
Tehama County
6/20/16
| 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 | - | - | 6.0 | 18.3 | 486 |
| Oriental Fruit Moth | 3/17 | 5/19 | - | - | 0.08 | 23.3 | 892 |
| Peach Twig Borer | 4/7 | 5/31 | - | - | 0.33 | 17.0 | 471 |
| Navel Orangeworm Eggs | 4/7 | - | - | - | 0 | 13.0 | 1063 |
| San Jose Scale | 3/21 | - | - | - | - | 16.0 | 1418 |
| Walnut Scale Crawlers | 5/16 | - | - | - | - | - | - |
- Notice the second male Codling moth biofix was 5/31. Our in- orchard weather stations show a 486 Degree day accumulation.
- The second PTB biofix was 5/31 monitored in almonds just south of Red Bluff.
- We have Walnut Husk Fly traps up and no flies yet.
- 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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