Plant balled and burlapped, balled and potted, and container-grown ornamental landscape plants.
Thinning of broadleaf and narrowleaf evergreens may be done when damaging low temperatures (below freezing) and drying winds are no longer a threat. Head back and lightly shape evergreens to remove dead and broken branches and brown, winter-injured foliage. The new growth on the plant will help you identify healthy plant parts.
Irrigate newly planted or established ornamentals any time there is less than 1 inch of weekly rainfall and plants are actively growing. Apply water at the rate of 1 quart per square foot of planting area on poorly drained soils. On well drained soils, use a half-gallon of water per square foot.
For newly planted ornamentals, spread a 2- to 3-inch layer of mulch over the soil in the bed or around trees.
Warning! Not all formulations of all recommended pesticides are labeled for all suggested uses. Buy formulations that are labeled for the specific pest problem. Follow all pesticide label directions and precautions.
When a particular pest becomes active depends on the weather conditions in your area. The pest management guide gives general guidelines for a broad geographic area. Depending on your location, a particular pest may appear early or late within the month(s) in which the pest is listed.
Pest Common Hosts Controls ------------------------------------------------------------ Insects adelgids Douglas fir Diazinon, malathion, Sevin
aphids most ornamentals Diazinon, Orthene, malathion, Sevin
beetles most ornamentals methoxychlor, Sevin
borers birch, dogwood, lilac, mountain ash, oak, poplar, willow
lace bugs amelanchier, azalea, Diazinon, hackberry, mountain malathion, ash, oak, pieris, Orthene rhododendron, sycamore
leaf miners arborvitae, birch, Diazinon, hawthorn, holly, Orthene, Sevin spruce
mealybugs taxus malathion, Orthene, superior oil
mites most ornamentals malathion,
plant bugs and honey locust malathion, leafhoppers Orthene, Sevin
scales ash, euonymus, fruit Orthene, trees, hackberry, Malathion, hawthorn, hemlock, Sevin, juniper, lilac, superior oil linden, maple, mountain ash, oak, pachysandra, pine, poplar, rose, spruce, willow
weevils arborvitae, azalea, Orthene euonymus, hemlock, pine, rhododendron, taxus
Diseases anthracnose ash, maple, oak, Benlate sycamore
bacterial blight English ivy, lilac fixed copper
Botrytis blight rose Benlate
canker and rot most ornamentals Prune out infected plant parts.
crown gall euonymus, rose Destroy infected plants.
fire blight cotoneaster, Prune out crab apple, fruit infected plant trees, hawthorn, parts. mountain ash, pyracantha
leaf spot most ornamentals fixed copper
powdery mildew most ornamentals Benlate, sulfur
scab crabapple, fruit Benlate trees, mountain ash, pyracantha
twig blight juniper Benlate
Verticillium wilt most ornamentals no effective chemical or cultural control
wetwood elm, maple no effective chemical or cultural control