Originally published by Kelly Allsup on November 11, 2020.
Time to Spray |
Active Insect or Disease |
Chemical Recommendations (ONE PER APPLICATION) |
Special Recommendations (& read label instructions) |
Dormant |
Overwintering: San Jose Scale Euro. Red Mite Eggs Aphid Eggs |
Dormant or Horticulture Oil (Superior Oil, Bonide All Seasons Horticultural & Dormant Spray Oil) |
Only use if pests present previous year. Temperatures should be above 45 and cannot drop below freezing for 24 hours. |
Green Tip |
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Silver Tip |
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Fire Blight
Bitter Rot / Black Rot
|
Copper if fire blight present in previous two growing seasons. Mancozeb for scab, bitter rot, black rot. Copper and Mancozeb can be mixed. |
Half-Inch Green |
Apple Scab |
Apple Scab
|
Allow more than 10 days to spray Captan after Dormant Oil |
Tight Cluster |
Apple Scab |
Apple Scab
Powdery Mildew
|
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Pink |
Apple Scab
SCOUT FOR: Rosy Apple Aphid |
Apple Scab
Powdery Mildew
Cedar Apple Rust
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Bloom |
Apple Scab
SCOUT FOR: Rosy Apple Aphid |
Apple Scab
Powdery Mildew
Cedar Apple Rust
|
Place Codling Moth Traps |
Full Bloom |
SCOUT FOR: Codling Moth |
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Check Codling Moth traps for first catch (Biofix) |
Petal Fall |
Powdery Mildew
SCOUT FOR: Rosy Apple Aphid |
Mites
|
Spray foliage, scout and repeat if label requires |
First cover |
Bitter Rot |
Aphid and Scale
Codling Moth
|
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Second Cover (10 Days after First Cover) |
Bitter Rot |
Apple Maggot and Plum curculio
|
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Additional Cover |
Japanese Beetles SCOUT FOR: Codling Moth (2nd Generation) |
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NOTES:
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No endorsements intended.
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If you compare the rate of an insecticide by itself (like carbaryl), then by how much is in orchard spray premixes, you will find the orchard spray is SIGNIFICANTLY less and may not provide sufficient insect control. Better off tank mixing individual components in many cases.
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Know the pH of your water source and how it may change efficacy.
On Fungicides
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To reduce likelihood of resistance, never use one active ingredient for more than two applications in a row.
On Insecticides
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For codling moth, alternate active ingredients
Additional Resources
Illinois Fruit and Vegetable News: https://ipm.illinois.edu/ifvn/
Labels for products available in Illinois can be searched online at: https://agr.state.il.us/sharepoint/usaplantsproductsearch.php
or at: http://www.cdms.net/Label-Database/Advanced-Search