Columbus MT - C9321
Data is up through May 6, 2026
Growing Degree Days since January 1:
Apple Maggot
Biofix: January 1, 2026
Degree Days since Biofix:603
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Apple Maggot summary click here.
Billbugs
Biofix: January 13, 2026
Degree Days since Biofix:978
Management Action 1 Week Ago:none
Present Management Action:May 6 - 30% of adult billbugs are present. If making a preventive treatment (for example, neonicotinoids, anthranilic diamides, or pyrethroids), apply now.
Management Action for the Next 3 Weeks:May 30 - 50% of billbug adults are active. If making a curative treatment(for example, neonicotinoid or pyrethroid), apply now.
For a current Billbugs summary click here.
Cereal Leaf Beetle
Biofix: May 6, 2026
Degree Days since Biofix:0
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:May 17 to May 19 - Peak CLB egg numbers occur on small grain foliage.
Early scouting now can identify fields that could be at risk of significant CLB damage this year.
It is too early to take control action, however (instead, scouting should be repeated at 325).May 30 to May 31 - Overall field populations of CLB now include approximately 50% eggs and 50% larvae. <br><br>Now is an excellent time to sample to determine whether there will be need for control (see CLB Utah Pests Fact Sheet). <br><br>If control needed, it is best if possible to apply between 400 and 450 DD rather than earlier (to minimize harm to biological control of CLB by parasitic wasps).
Early scouting now can identify fields that could be at risk of significant CLB damage this year.
It is too early to take control action, however (instead, scouting should be repeated at 325).May 30 to May 31 - Overall field populations of CLB now include approximately 50% eggs and 50% larvae. <br><br>Now is an excellent time to sample to determine whether there will be need for control (see CLB Utah Pests Fact Sheet). <br><br>If control needed, it is best if possible to apply between 400 and 450 DD rather than earlier (to minimize harm to biological control of CLB by parasitic wasps).
For a current Cereal Leaf Beetle summary click here.
Codling Moth - Trap Biofix
Biofix: April 21, 2026
Degree Days since Biofix:49
Moth Flight: 5.4% of moths in 1st generation have emerged
Egg Hatch: Egg Hatch is over for the season
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:May 24 - Optional management strategy for First Generation.
Apply horticultural oil to smother eggs that have been laid up to this point. Good coverage is essential.
The next spray will not be applied until the date that corresponds to 350 degree days.May 26 - Egg hatch for first generation begins.
Apply the first insecticide application (Delegate, Altacor, Assail, Belt, Intrepid, etc.) and continue every 14-21 days until the end of first generation egg hatch, which corresponds to the date at 920 degree days (typically 2-3 additional sprays depending on temperatures).
Apply horticultural oil to smother eggs that have been laid up to this point. Good coverage is essential.
The next spray will not be applied until the date that corresponds to 350 degree days.May 26 - Egg hatch for first generation begins.
Apply the first insecticide application (Delegate, Altacor, Assail, Belt, Intrepid, etc.) and continue every 14-21 days until the end of first generation egg hatch, which corresponds to the date at 920 degree days (typically 2-3 additional sprays depending on temperatures).
For a current Codling Moth - Trap Biofix summary click here.
Fire Blight
*This model only applies when trees are in bloom.
4-day Risk Value: 98
Blight potential for today and next two days:
For a current Fire Blight summary click here.
4-day Risk Value: 98
Blight potential for today and next two days:
| Condition | Today | Tomorrow | Next Day |
|---|---|---|---|
| If blight was in your orchard last year | CAUTION | LOW | CAUTION |
| If blight was only nearby last year | LOW | LOW | LOW |
| If no blight last year | LOW | LOW | LOW |
Greater Peachtree Borer
Biofix: January 1, 2026
Degree Days since Biofix:323
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:May 17 to May 20 - Hang pheromone trap to monitor for first flight of this clearwing moth.
For a current Greater Peachtree Borer summary click here.
Obliquebanded Leafroller
Biofix: Not established yet for 2026
Degree Days since March:475
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:May 15 to May 23 - Hang pheromone trap in orchard.
For a current Obliquebanded Leafroller summary click here.
Peach Twig Borer
Biofix: Not established yet for 2026
Degree Days since March:263
Management Action 1 Week Ago:none
Present Management Action:May 10 - Place pheromone trap in orchard to get biofix (first moth flight)
Management Action for the Next 3 Weeks:May 22 to May 28 - First moths expected
For a current Peach Twig Borer summary click here.
San Jose Scale
Biofix: April 21, 2026
Degree Days since Biofix:45
Males: 56% of adult males in 1st generation have emerged.
Crawlers: Crawlers is over for the season
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current San Jose Scale summary click here.
Spotted Wing Drosophila
Biofix: January 1, 2026
Degree Days since Biofix:323
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:May 27 to May 28 - Hang monitoring traps. Adult flies of the 1st generation begin emerging.
In addition, egg-laying on wild or early fruits by overwintering females is at its peak.June 3 - If SWD has been confirmed on your fruit farm, now is the time to begin protecting fruits with insecticides because the 1st generation females have begun egg-laying.
In addition, egg-laying on wild or early fruits by overwintering females is at its peak.June 3 - If SWD has been confirmed on your fruit farm, now is the time to begin protecting fruits with insecticides because the 1st generation females have begun egg-laying.
For a current Spotted Wing Drosophila summary click here.
Walnut Husk Fly
Biofix: January 1, 2026
Degree Days since Biofix:789
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Walnut Husk Fly summary click here.
Western Cherry Fruit Fly
Biofix: Not established yet for 2026
Degree Days since March:789
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Western Cherry Fruit Fly summary click here.
