Rose Rosette Disease: Are The Knock Out Roses® to blame?

Rose Rosette Disease , or RRD , manifests itself on rosebush in the form of ramification that look like “ witches broom ” . It looks standardized to damage due to unintentionally spraying an herbicide like bout - up on your pink wine .

The cause is a microscopic mite that goes by the name of Phyllocoptes Fructiphilus . While wingless , they disperse from rosiness to rose on puffs of confidential information and transmit RRD to other roses when it run on them .

It is increasing in frequency , including in my own garden . I have about four works that will be dug up because they are infected . We will talk more about how to deal with it after and also why it ’s not a reason to stop originate roses . However , in this post I need to deal a rumour that says the cause of RRD are The Knock Out Roses ® .

Nothing can be further from the truth .

Knock Out Roses ® have been around only since the year 2000 , when they were introduced . The early reported sighting of RRD engagement back to the 1940s – some 50 plus years before The Knock Out Roses ® were introduce . The chief rose wine that does impart it is a wild rose – R. Japanese rose .

In the 1930s and 1940sR. multiflorabecame wide established in the central and eastern parts of the United States . part with the assist of the USDA and partly because it spreads like crazy . Where I live in South Carolina it ’s everywhere . It was originally planted for erosion control , hedging and so on .

In the United States the first sightings of RRD were in California back in the forties . It demonstrate up in Nebraska in the late 1950s and other sixties . Another outbreak occurred in Kansas and Missouri and then spread to Oklahoma and Arkansas in the late 1970s and former 1980s . It systematically overspread along those planting ofR. multiflora . Since then it has marched steadily on – generally viaR. multiflora .

RRD can taint all rosebush . I see it on a broad range from old to modern . So while RRD can taint The Knock Out blush wine ® , those rose themselves did not spread it around the country . I mistrust the rumor started because since so many Knock Out Roses ® have been planted , they are the most widely seen rose and therefore people pick them . I have a Double Knock Out ® bush in my garden and I see them all around me . Most are clean , include mine , and the infections I have seen are no more numerous than infection on other roses . Besides of courseR. multiflorawhich does get it easy .

So if you get or see RRD on a Knock Out Rose ® ( or any rosiness ) the first thing I suggest you do is starting look around your area for R. multiflora . Then when you retrieve it destroy it , even if it does not come out to be infect .

But do n’t find fault your Knock Out Roses ® .

Happy Roseing , Paul

Photos : Paul Zimmerman Roses

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