Your current browser is not supported by our site. We recommend using Chrome or Firefox to ensure full functionality.
Utah Climate Center banner
Columbus MT - C9321
Data is up through July 9, 2020
Growing Degree Days since January 1:1019
Change Station:
Codling Moth
Biofix: May 14, 2020
Degree Days since Biofix:842
Moth Flight:0.1% of moths in 1st generation have emerged.
Egg Hatch:97% of eggs in 1st generation have hatched.
Management Action 1 Week Ago:none
Present Management Action:July 13 - First Generation end of egg hatch. Your last insecticide spray of the first generation should provide protection up to this date.
Management Action for the Next 3 Weeks:July 23 to July 24 - 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).
August 4 to August 6 - Second Generation, start of peak egg hatch.Make sure fruit is protected at least through the peak period, which ends at 1700 degree days.
For a current Codling Moth summary click here.
Peach Twig Borer
Biofix: June 1, 2020
Degree Days since Biofix: 621
Moth Flight: 0% of moths in 1st generation have emerged.
Egg Hatch: 91.1% of eggs in 1st generation have hatched.
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:July 18 - End sprays for first summer generation. (Egg hatch ends.)
August 6 - Begin sprays for second 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.
For a current Peach Twig Borer summary click here.
Fire Blight
*This model only applies when trees are in bloom.
San Jose Scale
Biofix: May 14, 2020
Degree Days since Biofix: 795
Males: 1% of adult males in 1st generation have emerged.
Crawlers: 96.8% 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.
Western Cherry Fruit Fly
Biofix: January 1, 2020
Degree Days since January 1: 1816
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.
Greater Peachtree Borer
Biofix: January 1, 2020
Degree Days since January 1: 938
Management Action 1 Week Ago:July 7 to July 8 - 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.
Present Management Action:July 9 to July 10 - 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.
Management Action for the Next 3 Weeks:none
For a current Greater Peachtree Borer summary click here.
Obliquebanded Leafroller
Biofix: Not established yet for 2020
Degree Days since January 1: 1413
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Obliquebanded Leafroller summary click here.
Apple Maggot
Biofix: January 1, 2020
Degree Days since Biofix: 1523
Management Action 1 Week Ago: July 1 - Set out sticky traps
July 6 - First emergence of adults. Begin sprays; continue at 5-14 day intervals until harvest
Present Management Action: none
Management Action for the Next 3 Weeks: none
For a current Apple Maggot summary click here.
Cereal Leaf Beetle
Biofix: May 6, 2020
Degree Days since Biofix:1179
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.