Miles City MT - KMLS
Data is up through July 13, 2025
Growing Degree Days since January 1:
Apple Maggot
Biofix: January 1, 2025
Degree Days since Biofix:1896
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, 2025
Degree Days since Biofix:2636
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, 2025
Degree Days since Biofix:1479
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: May 3, 2025
Degree Days since Biofix:1140
Moth Flight: 18% of moths in 2nd generation have emerged
Egg Hatch: 2% of moths in 2nd generation have hatched.
Management Action 1 Week Ago:July 12 - 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).
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).
Present Management Action:July 13 - 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).
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).
Management Action for the Next 3 Weeks:July 24 to July 25 - Second Generation, start of peak egg hatch.
Make sure fruit is protected at least through the peak period, which ends at 1700 degree days.August 5 to August 6 - Second Generation, end of peak egg hatch.
Egg hatch is waning for the second generation, and will be completely over by 2100 degree days.
Make sure fruit is protected at least through the peak period, which ends at 1700 degree days.August 5 to August 6 - Second Generation, end of peak egg hatch.
Egg hatch is waning for the second generation, and will be completely over by 2100 degree days.
For a current Codling Moth - Trap Biofix summary click here.
Fire Blight
*This model only applies when trees are in bloom.
Greater Peachtree Borer
Biofix: January 1, 2025
Degree Days since Biofix:1163
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Greater Peachtree Borer summary click here.
Obliquebanded Leafroller
Biofix: June 13, 2025
Degree Days since Biofix:650
Management Action 1 Week Ago:July 5 - 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.
Present Management Action:none
Management Action for the Next 3 Weeks:July 26 to July 29 - End of first generation egg hatch.August 6 to August 7 - Second generation moth flight begins.August 10 - Most larvae of the first generation are mature.
For a current Obliquebanded Leafroller summary click here.
Peach Twig Borer
Biofix: May 27, 2025
Degree Days since Biofix:901
Moth Flight: 2% of moths in 1st generation have emerged
Egg Hatch: Egg Hatch is over for the season
Management Action 1 Week Ago:July 9 - End sprays for first summer generation. (Egg hatch ends.)
Present Management Action:none
Management Action for the Next 3 Weeks:July 26 to July 30 - 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.
San Jose Scale
Biofix: May 3, 2025
Degree Days since Biofix:1087
Males: 54.1% 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:August 2 to August 6 - Second generation crawlers are most active now. If you have a heavy infestation, treat at this time with Esteem or 1% horticultural oil. Otherwise, wait and spray with oil next spring at budbreak.
For a current San Jose Scale summary click here.
Spotted Wing Drosophila
Biofix: January 1, 2025
Degree Days since Biofix:1330
Management Action 1 Week Ago:July 10 - Continue servicing traps. Adult emergence of the 2nd generation of flies is peaking at this time.
Present Management Action:July 20 - Continue to keep fruit protected with insecticides if spotted wing has been confirmed on your fruit farm.
Peak egg-laying by 2nd generation flies is now occurring.
Peak egg-laying by 2nd generation flies is now occurring.
Management Action for the Next 3 Weeks:July 20 to July 21 - Continue to keep fruit protected with insecticides if spotted wing has been confirmed on your fruit farm.
Peak egg-laying by 2nd generation flies is now occurring.July 31 - Continue servicing traps. Adult emergence of the 3rd generation of flies is peaking at this time.August 9 to August 10 - Continue to keep fruit protected with insecticides if spotted wing has been confirmed on your fruit farm.
Peak egg-laying by 3rd generation flies is now occurring.
Peak egg-laying by 2nd generation flies is now occurring.July 31 - Continue servicing traps. Adult emergence of the 3rd generation of flies is peaking at this time.August 9 to August 10 - Continue to keep fruit protected with insecticides if spotted wing has been confirmed on your fruit farm.
Peak egg-laying by 3rd generation flies is now occurring.
For a current Spotted Wing Drosophila summary click here.
Walnut Husk Fly
Biofix: January 1, 2025
Degree Days since Biofix:2220
Management Action 1 Week Ago:none
Present Management Action:July 13 - Mature females. If using conventional insecticides, start applications now and continue until harvest (apricot, peach) or until one month before harvest (walnut).
Management Action for the Next 3 Weeks:July 21 - Females have begun egg-laying. They insert eggs inside the host nut or fruit.July 28 - Egg hatch begins inside host nut or fruit.July 29 - 10% of adults have emerged.August 10 - 50% of adults have emerged.
For a current Walnut Husk Fly summary click here.
Western Cherry Fruit Fly
Biofix: Not established yet for 2025
Degree Days since March:2220
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.