Bozeman MT - BOZM
Data is up through August 28, 2025
Growing Degree Days since January 1:
Apple Maggot
Biofix: January 1, 2025
Degree Days since Biofix:2452
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:3422
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:2204
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 11, 2025
Degree Days since Biofix:1539
Moth Flight: 78.9% of moths in 2nd generation have emerged
Egg Hatch: 42.9% of moths in 2nd generation have hatched.
Management Action 1 Week Ago:August 20 to August 21 - Second Generation, start of peak egg hatch.
Make sure fruit is protected at least through the peak period, which ends at 1700 degree days.
Make sure fruit is protected at least through the peak period, which ends at 1700 degree days.
Present Management Action:none
Management Action for the Next 3 Weeks:September 7 to September 11 - Second Generation, end of peak egg hatch.
Egg hatch is waning for the second generation, and will be completely over by 2100 degree days.
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:1656
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 27, 2025
Degree Days since Biofix:1335
Management Action 1 Week Ago:August 22 to August 23 - Most larvae of the first generation are mature.
Present Management Action:August 30 to August 31 - Larval feeding of the first generation ends (most are now in the pupal stage).
Management Action for the Next 3 Weeks:September 9 to September 11 - Second generation egg hatch begins; apply treatment now if necessary.
For a current Obliquebanded Leafroller summary click here.
Peach Twig Borer
Biofix: June 10, 2025
Degree Days since Biofix:1308
Moth Flight: 71.6% of moths in 2nd generation have emerged
Egg Hatch: 17.6% of moths in 2nd generation have hatched.
Management Action 1 Week Ago:August 22 to August 27 - 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.
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Peach Twig Borer summary click here.
San Jose Scale
Biofix: May 11, 2025
Degree Days since Biofix:1448
Males: 99.4% of adult males in 1st generation have emerged.
Crawlers: 20.2% of crawlers in 1st generation have emerged.
Management Action 1 Week Ago:none
Present Management Action:September 4 - 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.
Management Action for the Next 3 Weeks:September 4 to September 15 - 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:1714
Management Action 1 Week Ago:none
Present Management Action:August 29 to August 31 - Continue servicing traps. Adult emergence of the 3rd generation of flies is peaking at this time.
Management Action for the Next 3 Weeks:September 21 to September 25 - 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 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:2869
Management Action 1 Week Ago:August 21 - Egg hatch begins inside host nut or fruit.August 23 - 10% of adults have emerged.
Present Management Action:none
Management Action for the Next 3 Weeks:September 11 - 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:2869
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.