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ROSE ROSETTE IS DEADLY AND CONTAGIOUS
Posted on Nov 5th, 2012
There is no cure. Any diseased roses should be dug up, roots included, immediately when you see any of these symptoms:
•rapid stem elongation
•leaf distortion
•leaf reddening
•leaf chlorosis with yellow mosaic patterns
•abnormal narrow leaflets or smaller leaves than normal
•thickened stems premature lateral bud development
•excessive thorn production
•Witch's broom -- multiple stems at ends of branches
•leaf distortion
•leaf reddening
•leaf chlorosis with yellow mosaic patterns
•abnormal narrow leaflets or smaller leaves than normal
•thickened stems premature lateral bud development
•excessive thorn production
•Witch's broom -- multiple stems at ends of branches
In early spring, mites migrate onto developing shoots where females lay eggs. Young mites may move from plantt to plant by attaching to insects. They may also disperse via air currents. The mites usually transmit the disease May through July. Most infecton symptoms appear in July and August. Mite populations are most abundant from June to July and peak in September.
Pruners used on infected roses can transmit the disease to healthy roses. Disinfect the pruners with Lysol before you move from one plant to another.
Although rose rosette appeared back in 1941, it hasn't become a problem until more recently. The popularity of Carpet Roses and Knockout Roses has led to the increase, according to Bob Neier, agent with the Kansas State University Extension office for Sedgwick County.
Remember, there is no cure. You must remove the entire plant and discard it to prevent infection of healthy roses in your yard and your neighbors.
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