Columbus MT - C9321
Data is up through June 24, 2026
Growing Degree Days since January 1:
Apple Maggot
Biofix: January 1, 2026
Degree Days since Biofix:1464
Management Action 1 Week Ago:June 22 to June 23 - First emergence of adults. Begin sprays; continue at 5-14 day intervals until harvest
Present Management Action:June 24 - First emergence of adults. Begin sprays; continue at 5-14 day intervals until harvest
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:2155
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Billbugs summary click here.
Cereal Leaf Beetle
Biofix: May 6, 2026
Degree Days since Biofix:852
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Cereal Leaf Beetle summary click here.
Codling Moth - Trap Biofix
Biofix: April 21, 2026
Degree Days since Biofix:650
Moth Flight: 98% of moths in 1st generation have emerged
Egg Hatch: 81% of moths in 1st generation have hatched.
Management Action 1 Week Ago:June 22 to June 23 - First Generation, end of peak egg hatch.
Egg hatch is waning for the first generation, and will be completely over by 925 degree days.
Egg hatch is waning for the first generation, and will be completely over by 925 degree days.
Present Management Action:June 24 - First Generation, end of peak egg hatch.
Egg hatch is waning for the first generation, and will be completely over by 925 degree days.
Egg hatch is waning for the first generation, and will be completely over by 925 degree days.
Management Action for the Next 3 Weeks:July 11 - First Generation end of egg hatch.
Your last insecticide spray of the first generation should provide protection up to this date.July 21 to July 22 - Second Generation egg hatch begins.
Start sprays (Delegate, Altacor, Assail, Belt, Intrepid, etc.) and continue every 14-21 days until end of egg hatch, which corresponds to 2100 degree days (typically 2-3 additional sprays depending on temperatures).
Your last insecticide spray of the first generation should provide protection up to this date.July 21 to July 22 - Second Generation egg hatch begins.
Start sprays (Delegate, Altacor, Assail, Belt, Intrepid, etc.) and continue every 14-21 days until end of egg hatch, which corresponds to 2100 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: 288
Blight potential for today and next two days:
For a current Fire Blight summary click here.
4-day Risk Value: 288
Blight potential for today and next two days:
| Condition | Today | Tomorrow | Next Day |
|---|---|---|---|
| If blight was in your orchard last year | EXTREME | EXTREME | EXCEPTIONAL |
| If blight was only nearby last year | HIGH | HIGH | EXCEPTIONAL |
| If no blight last year | LOW | LOW | HIGH |
Greater Peachtree Borer
Biofix: January 1, 2026
Degree Days since Biofix:894
Management Action 1 Week Ago:none
Present Management Action:June 25 to June 29 - If you are not using a pheromone trap to detect first moth emergence, start your trunk sprays now (if damage is present from previous year). Only treat the lower 12-18" of trunk and exposed roots, using permethrin, carbaryl, lambda-cyhalothrin, etc. Maintain protection through September.
Management Action for the Next 3 Weeks:none
For a current Greater Peachtree Borer summary click here.
Obliquebanded Leafroller
Biofix: June 9, 2026
Degree Days since Biofix:276
Management Action 1 Week Ago:none
Present Management Action:June 28 - Peak egg-laying of first generation. If using Intrepid (insect growth regulator), it can be appied now, targeting eggs, larvae, and adults. Intrepid lasts 14 or more days and may need to be reapplied.June 30 to July 1 - Egg hatch of first generation begins. Apply a treatment that targets larvae. Options, in order of efficacy are: Delegate, Altacor, Intrepid (add adjuvant), Entrust, or Sevin. All last approximately 14 days, except Entrust, which lasts 7. A second application may be necessary based on orchard history and scouting.
Management Action for the Next 3 Weeks:July 1 to July 2 - Egg hatch of first generation begins. Apply a treatment that targets larvae. Options, in order of efficacy are: Delegate, Altacor, Intrepid (add adjuvant), Entrust, or Sevin. All last approximately 14 days, except Entrust, which lasts 7. A second application may be necessary based on orchard history and scouting.July 3 - If using a Bt product (Bacillus thuringiensis, organic) apply now. Products like Dipel only last 5-7 days and may need to be reapplied to last the larval stage. Note that larvae need to ingest the Bt for it to work. Bt will not work on mature larvae.
For a current Obliquebanded Leafroller summary click here.
Peach Twig Borer
Biofix: May 24, 2026
Degree Days since Biofix:440
Moth Flight: 97% of moths in 1st generation have emerged
Egg Hatch: 42% of moths in 1st generation have hatched.
Management Action 1 Week Ago:June 16 to June 18 - Begin sprays for first summer generation (choose a later date in this time span if damage was light in your orchard last year). These dates correspond to 5% - 16% egg hatch
Present Management Action:none
Management Action for the Next 3 Weeks:July 15 - End sprays for first summer generation. (Egg hatch ends.)
For a current Peach Twig Borer summary click here.
San Jose Scale
Biofix: April 21, 2026
Degree Days since Biofix:613
Males: Adult Males is over for the season
Crawlers: 70.9% of crawlers in 1st generation have emerged.
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:924
Management Action 1 Week Ago:none
Present Management Action:June 29 to June 30 - Continue to keep fruit protected with insecticides if spotted wing has been confirmed on your fruit farm.
Peak egg-laying by 1st generation flies is now occurring.
Peak egg-laying by 1st generation flies is now occurring.
Management Action for the Next 3 Weeks:July 14 to July 15 - Continue servicing traps. Adult emergence of the 2nd generation of flies is peaking at this time.
For a current Spotted Wing Drosophila summary click here.
Walnut Husk Fly
Biofix: January 1, 2026
Degree Days since Biofix:1793
Management Action 1 Week Ago:June 16 - Hang yellow sticky traps.
Present Management Action:June 28 to June 30 - First adult emergence. If using spinosad or GF-120, start applications now and continue until harvest (apricot, peach) or until one month before harvest (walnut).
Management Action for the Next 3 Weeks:July 11 - Mature females. If using conventional insecticides, start applications now and continue until harvest (apricot, peach) or until one month before harvest (walnut).July 20 - Females have begun egg-laying. They insert eggs inside the host nut or fruit.
For a current Walnut Husk Fly summary click here.
Western Cherry Fruit Fly
Biofix: Not established yet for 2026
Degree Days since March:1793
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.