Stevensville MT - STVM8
Data is up through April 16, 2026
Growing Degree Days since January 1:
Change Station:
Apple Maggot
Biofix: January 1, 2026
Degree Days since Biofix:291
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:540
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: Not established yet for 2026
Degree Days since March:291
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: Not established yet for 2026
Degree Days since March:124
Management Action 1 Week Ago:none
Present Management Action:April 15 to April 22 - Place pheromone monitoring traps in orchard before bloom to get biofix (first moth flight). Check traps daily until first moths are caught.
Management Action for the Next 3 Weeks:April 22 - Place pheromone monitoring traps in orchard before bloom to get biofix (first moth flight). Check traps daily until first moths are caught.

April 27 to May 2 - First moths expected in pheromone traps.
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: 0
Blight potential for today and next two days:
Condition Today Tomorrow Next Day
If blight was in your orchard last year LOW LOW LOW
If blight was only nearby last year LOW LOW LOW
If no blight last year LOW LOW LOW
For a current Fire Blight summary click here.
Greater Peachtree Borer
Biofix: January 1, 2026
Degree Days since Biofix:146
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: Not established yet for 2026
Degree Days since March:241
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.
Peach Twig Borer
Biofix: Not established yet for 2026
Degree Days since March:124
Management Action 1 Week Ago:none
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: Not established yet for 2026
Degree Days since March:109
Management Action 1 Week Ago:April 10 - Place traps in orchard for biofix (first adult male flight)
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:146
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:none
For a current Spotted Wing Drosophila summary click here.
Walnut Husk Fly
Biofix: January 1, 2026
Degree Days since Biofix:397
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:397
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.