Echinacea , unremarkably call coneflower , is a repeated plant that support daisy - type efflorescence from midsummer to frost . The flowers of the species types are pinkish - purple , while varieties have blooms in shades pink , purple , orangish , yellow or white . The plants grow 2 to 4 feet tall , depend on the smorgasbord . Echinacea plants grow best in full Dominicus , but they will grow in fond shade . They need well - drain soil and tolerate drouth and estrus . They are hardy in Zones 3 to 9 .

Leaf Diseases

leafage blight is cause by the anthracnose fungus and answer in brown dead leaves on echinacea plants . It can be treated with a fungicide applied according to the producer ’s guidance .

A pseudomonas bacteria causes ruby brown spot and misshapen leaves , while a xanthomonas bacterium cause angulate to circular brown spots with yellow halos . foliage point do not ordinarily affect the wellness of the plant . There is no treatment for bacterial leaf spots .

Yellows Disease

Yellows disease , also called aster yellows , damages the industrial plant tissue that conducts food in infected works . The petal of the flowers turn green and uprise into distorted leafage - like structures called witch ’s brooms . The leaves turn yellow or reddish and the works becomes stunt , and eventually give way . There is no treatment for yellows disease and infected works should be dispatch and destroy .

Southern Blight

The fungus sclerotium rolfsii regard echinacea plant with southern blight during hot weather . White strands of mycelium maturate at the soil line of flora , causing part or all of the septic plant life to droop and collapse . There is no discussion for southerly blight . The integral plant and the strands of mycelium should be removed and destroy .

Mold and Mildew

Gray , or sooty , mold is a fuzzy grey fungus that originate on the leaves , stem , bud and blossom of echinacea plants . Powdery mold is a dusty white fungus that sham the same works parts . Both are more common in coolheaded moist weather condition . The infected plant part should be removed and destruct . A fungicide hold at the rate recommend by the manufacturing business may prevent and verify gray mould and powdery mildew .

References

…