Coreopsis Perennial Shrub Diseases:
Symptoms-This virus is moved from infected clematis and some weeds by nematodes. Remove infected plants
Management-Maintain good leafhopper control and eliminate nearby weeds that harbor aster yellows.
Bacterial Leaf Spot:
Symptoms-Irregular brown blotches and spots develop on leaves
Management-Water in a manner that keeps leaf surfaces dry and water when the leaves will dry quickly. Remove infected plants. Apply PureSpray Green to entire plant to help prevent and control leaf spot. Buy PureSpray Green Now!
Symptoms-Lower leaves die and become covered with white to gray, fluffy fungal growth that soon becomes a mass of gray spores.
Management-Water in a manner that keeps leaf surfaces and flowers dry and water when the plants will dry quickly. Apply copper sulfate, fludioxonil, or trifloxystrobin.
Symptoms-Plants wilt, brown, and die. White fungal growth webs at the base of the dying plant and become peppered with small, tan, round structures.
Management-Remove infected plants. Mulch in a manner that does not hold moisture close to the stems.
Symptoms-Black spots form on the upper leaf surface and white felt-like growth covers the underside of the leaf.
Fungal Leaf Spots:
Symptoms-Purple to tan spots develop on leaves.
Management-Water in a manner that keeps leaf surfaces dry and water when the leaves will dry quickly. Apply trifloxystrobin or fludioxonil.
Symptoms-White fuzzy growth develops on the upper side of the leaves.
Management-Apply PureSpray Green. An all organic spray that works great for controlling powdery mildew. BUY NOW
Symptoms-Plants yellow, wilt, collapse, and die.
Management-Apply trifloxystrobin or fludioxonil,
Symptoms-Orange-yellow masses of spores form on the underside of leaves.
Management-Remove infected plants. Cut plants back to the soil line in the fall. Apply PureSpray Green to help control and prevent rust.
Symptoms-Leaves have a coating of gray to brown spores.
Management-Water in a manner that keeps leaf surfaces dry and water when the leaves will dry quickly.
Symptoms-Stems turn brown or tan and die as large portions of the plant collapse.
Management-Cut plants back to the soil line in the fall. Apply trifloxystrobin.
Symptoms-Plants wilt, turn brown and die.
Management-Remove infected plants. This fungus survives in the soil for very long periods of time, even in the absence of susceptible plants. Do not plant susceptible varieties.