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Bozeman MT - BOZM
Data is up through July 9, 2020
Growing Degree Days since January 1:669
Change Station:
Codling Moth
Biofix: May 29, 2020
Degree Days since Biofix:448
Moth Flight:83.8% of moths in 1st generation have emerged.
Egg Hatch:42% of eggs in 1st generation have hatched.
Management Action 1 Week Ago:July 1 to July 2 - Optional management strategy for First Generation. This action only applies if you used horticultural oil at the date corresponding to 200 degree days. Apply first cover spray (Altacor, Delegate, Belt, Assail, Intrepid, etc.). Repeat applications every 14-21 days until end of egg hatch, which is the date corresponding to 920 degree days (typically 1 additional spray).
Present Management Action:none
Management Action for the Next 3 Weeks:July 20 to July 21 - First Generation, end of peak egg hatch. Egg hatch is waning for the first generation, and will be completely over by 925 degree days.
August 5 - First Generation end of egg hatch. Your last insecticide spray of the first generation should provide protection up to this date.
For a current Codling Moth summary click here.
Peach Twig Borer
Biofix: June 13, 2020
Degree Days since Biofix: 260
Moth Flight: 64% of moths in 1st generation have emerged.
Egg Hatch: 2% of eggs in 1st generation have hatched.
Management Action 1 Week Ago:none
Present Management Action:July 11 to July 15 - 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
Management Action for the Next 3 Weeks:none
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 29, 2020
Degree Days since Biofix: 415
Males: 0% of adult males in 1st generation have emerged.
Crawlers: 11.3% of crawlers in 1st generation have emerged.
Management Action 1 Week Ago:July 8 - First generation crawlers are most active now. br>/br>Spray once, using Esteem or 1% horticultural oil.
Present Management Action:July 9 to July 11 - First generation crawlers are most active now. br>/br>Spray once, using Esteem or 1% horticultural oil.
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: 1335
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: 670
Management Action 1 Week Ago:none
Present Management Action:none
Management Action for the Next 3 Weeks:July 23 to July 25 - 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.
For a current Greater Peachtree Borer summary click here.
Obliquebanded Leafroller
Biofix: Not established yet for 2020
Degree Days since January 1: 1129
Management Action 1 Week Ago:July 4 to July 8 - First moths of the summer generation are expected.
Present Management Action:July 9 to July 11 - First moths of the summer generation are expected.
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: 1081
Management Action 1 Week Ago: none
Present Management Action: July 14 to July 16 - Set out sticky traps
Management Action for the Next 3 Weeks: July 25 - First emergence of adults. Begin sprays; continue at 5-14 day intervals until harvest
For a current Apple Maggot summary click here.
Cereal Leaf Beetle
Biofix: May 6, 2020
Degree Days since Biofix:856
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.