Calendar of Apple Orchard Management Activities
|February to bloom||Complete dormant pruning.||Keep fruit-to-shoot growth balanced; remove dead wood and improve light penetration.||Every year.|
|Before buds open (Green tip)||Rake leaves. Burn; or bury; or mow to shred and speed rotting.||If not done previous fall, do now to reduce spring population of apple scab spores.|
|Bud swell to Green tip||Apply dormant oil.||Control spider mites and scale insects.||Once a year if scales and mites are a problem.|
|Green tip to petal fall||Apply fungicide.||1st generation apple scab control.||Before any rain that causes leaves to stay wet 6-10 hours.
One application protects for 7 days or 2 inches rain, whichever is first.
|During bloom||Identify and mark wild apple trees, to remove at any time.||Reduce disease and insect pest pressure.||As needed.|
|After bloom (Petal fall)||Apply insecticide.
Remove fire blight infections.
|Control plum curculio weevils; Sevin also improves fruit size by thinning; prevent biennial bearing.
Prevent further spread and loss of branches or whole trees.
|Spray Sevin (carbaryl), 2-3 sprays at 10-day intervals starting at petal fall or at first sign of damage, to control plum curculio and to thin fruit.
Most strikes appear within one month after bloom; remove to prevent new infections.
|Petal fall to four weeks before harvest||Apply fungicide at 2-4 week intervals.||Secondary apple scab control as needed; also prevents sooty blotch and flyspeck diseases and fruit rots.||Before rain. Each application protects 14-21 days or 2 inches rain, whichever is first.
Frequency depends on number of infections present.
|July and August
|Hang sticky red ball traps on branches near canopy edge, visible from outside of tree, to catch apple maggot flies (AMF). Renew stickiness every 3 weeks.
|Apply first insecticide spray when average of 1-2 AMF are caught per trap. Start counting again 10 days after first application. Respray if/ when 1-2 more AMF are caught per trap. Traps provide control when used at rate of 1 trap per bushel; this requires multiple traps per tree.
If not using red sticky traps, control AMF in mid-to-late July and again in early-to-mid August.
Protects fruit against sooty blotch and flyspeck, and prevents spread of apple scab.
|Check traps twice weekly for timing.
Each insecticide application protects against AMF egg-laying for about 10 days or 1.5 inches of rain.
Each fungicide application protects for about 21 days or 2-3 inches rain, whichever comes first.
|September to November||Harvest fruit; clean up fallen fruit.||Munch, crunch, a bunch for lunch! Fallen fruit is slippery, and provides food for voles.||Some cultivars ripen all at once; others are best harvested over a period of time for best quality.|
|November to December||Rake leaves. Burn; or bury; or mow to shred and speed rotting.
Place trunk guards around tree trunks to remain until spring.
|Reduce overwintering apple scab spores.
Protect from vole feeding.
|Rake once after all leaves have fallen.
As needed to prevent voles from girdling trunks.
From the GardenPro Answer Book; revised and updated by Lois Berg Stack, Ornamental Horticulture Specialist, University of Maine Cooperative Extension.
Apple management information courtesy of Glen Koehler, Associate Scientist, Apple IPM, UMaine Cooperative Extension.