University of California IPM Insect Update
Tehama County
8/1/2016
| 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 | 7/11 | - | 3.0 | 30.8 | 591 |
| Oriental Fruit Moth | 3/17 | 5/19 | 6/27 | 7/28 | 1.1 | 36.0 | 144 |
| Peach Twig Borer | 4/7 | 5/31 | 7/11 | - | .44 | 30.3 | 578 |
| Navel Orangeworm Eggs | 4/7 | - | - | - | 0 | 27.3 | 2114 |
| San Jose Scale | 3/21 | - | - | - | - | 30.5 | 2555 |
| Walnut Scale Crawlers | 5/16 | - | - | - | - | - | - |
- Notice the third male codling moth biofix was 7/11/16.
- Note the third biofix for PTB was 7/11/16.
- We have Walnut Husk Fly traps up in the Dairyville area of Tehama County and we caught our first male fly on 6/30/16. The first female with no eggs was caught 7/5/16. Our first WHF spray went on 7/6/16. The first female with eggs was caught 7/14/16. So far, we have treated three times. Every orchard is different so watch your traps and treat accordingly.
- 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 from 6/13 to 8/1.
- 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!
Leave a Reply