Term
Fire Blight - Erwinia
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Rose Family; apple, pear, pyraantha, etc.
Improve vigor of hosts, DR varieties, reduce nitrogen.
Moist spring, soft tissue.
Prune out infected 6-8" below site, sterilize tools, preventative spray with streptomycin or copper.
Clippers, bees, rain. |
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Term
Powdery Mildew
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Hydrangea, Lilac, Crape Myrtle, Chinese Elm, Rosa, Apple, Crabapple etc. (new growth)
DR varieties, prune out, reduce nitrogen.
Cool, dry spring with high humidity at night
Sanitiation, improve air circulation and reduce humidity, rake foliage in Fall
Wind - Fall foliage on ground |
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Term
Cedar Apple Rust
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Apples, Crabapples, Junipers
DR varietes, eliminate alternate host
Wet weather, cedar trees, infected trees (late Summer for Junipers)
Prune out galls, remove alternate host
Wind - Cedars alternate host
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Term
Pine Rust (gall rust, fusiiorm, pine needle rust)
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Native Pines
Avoid overcorwding, stress, monocultures
(Mid Spring to early Summer) Moist, shady, crowded conditions
Thin
Wind |
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Term
Black Spot
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Rose
DR varieties
Warm temperatures, spores present on branches, foliage, rain
Prune infected canes in Winter, air circulation, preventative spray when conditions warrant (avoid overhead and late)
Rain, foliage and stem overwinters |
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Term
Leaf Spot
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Azalea, Iris, Photinia, Maples
DR varieties, avoid monocultures, space
Wet cool springs
Avoid overwatering, thin
Water splash |
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Term
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Definition
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Term
Petal Blight (& Gray Mold)
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Camellias, Azalea
DR varieties, avoid monocultures
(January-April) Open flowers - Rain with infected plants in areas
Remove petals on ground, prune back
Wind-rain, petals on ground/base, Az=moist cloudy, warm |
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Term
Leaf Gall
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment?
What spreads it? |
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Definition
Camellia, Azalea
DR varieties, avoid monocultures
(late April, May) overwinters on bud (new growth site)
Wind, splash, water |
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Term
Anthracnose (spot & discula)
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Dogwood, Sycamore
DR varieties, avoid monocultures, prune suckers in Summer
Wet Cool
Prune out dead parts and provide more light, avoid injury, drip irrigate during drought, mulch, reduce Nitrogen
Rain (overwinters in cankers) |
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Term
Damping off
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Seedlings
DR varieties
Hot wet soil, crowded, lack of circulation
Improve drainage, space
Scilbourne |
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Term
Root Rot (Phytophthera Pythium)
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Eriacaecous, Boxwood
DR varieties, inspect nursey stock
Moist heavy soil
Proper soil prep/raised beds; destroy infected plants, sterilize pots
Infected nursery stock |
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Term
Die-back (Phomopsis)
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
Azaleas, Aucuba, Cypress, Eleagnus, Junipers.. Camellias
DR varieties
Drought and stress via stem wounds (pruning cuts and sun scald)
Proper sun exposure and correct pruning..proper irrigation during Summer, avoid high Nitrogen, overcrowding, and overhead irrigation
Rain, ants, pruning clippers |
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Term
What are the hosts? What can be done to decrease population on hosts?
What is the suseptible environment? What can be done to decrease population in the enviroment?
What spreads it? |
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Definition
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