Pests, diseases and issues to pay attention to this spring

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Magnolia Scale

Pest or Disease: Magnolia scale
Phenology and/or Species: Magnolia buds closed
Product/Remedy: Horticultural Oil
# of Treatments: 1-5 applications depending on severity

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Gypsy Moth

Pest or Disease: Gypsy moth
Phenology and/or Species: ‘Bridal Wreath’ Spiraea in full bloom
Product/Remedy: Dipel
# of Treatments: 3 applications

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Apple Scab

Pest or Disease: Apple Scab
Phenology and/or Species: Crab apple bud break
Product/Remedy: Compass
# of Treatments: 3 applications

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Overwintering Insects

Pest or Disease: Overwintering Insects
Phenology and/or Species: Dormant buds
Product/Remedy: Horticultural Oil
# of Treatments: 1 application

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Splits and Cracks

Pest or Disease: Splits and Cracks
Phenology and/or Species: As required
Product/Remedy: Pruning, Cabling
# of Treatments: As required

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Images courtesy of:
Joseph O’Brien, Clemson University, William Fountain, Brian Kunkel, David R. Lance, Becca Macdonald, USDA Forest Service, Richard Webb, Paul Wray

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