Michigan State University

Enviroweather

Model:

Current status of McIntosh and apple pests at Grand Junction, 2024 (Report issued 4/24/2024 10:19)

Biofix dates

Codling moth first sustained catch (estimate: 4/28):

Obliquebanded leafroller first sustained catch:

Oriental fruit moth first adult emergence (estimate: 4/14):

Oriental fruit moth second generation adult emergence begins:

Apple crop stages (McIntosh)

Last stage	Full Bloom on 4/23
Next stage	Petal Fall expected on 4/29
Harvest estimates	McIntosh: 9/1; Jonathan: 9/7; Red Delicious: 9/11 More details

Insect pest predictions

Insect	Last Stage	Next Stage	Selected Biofix	DD since biofix	DD Base
Apple maggot	No development observed	Emergence of adult fly expected in 796DD	--	Current (4/24): 159.2 Forecast (4/30): 222.6	50
Codling moth	No development observed	Biofix (first sustained catch) expected on 4/28	4/28	Current (4/24): Forecast (4/30): 41.1	50
Obliquebanded leafroller	No development observed	Watch for biofix (first sustained catch)	--	--	42
Oriental fruit moth	First eggs laid 4/21	Start of peak adult emergence expected on 4/29	4/14	Current (4/24): 91.9 Forecast (4/30): 180.3	45

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