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There are many different varieties of dahlias, and they can all be impacted by Dahlia Mosaic Virus (DMV), a widespread viral disease. DMV is causing significant losses in quality and yield of dahlias. While some dahlias will show symptoms of viral disease, others will appear just fine and fail slowly over time. Look for stripes and splotchy patterns that vary between light and dark green or leaves that are twisted and yellow. A comprehensive guide to what you need to know about dahlia diseases and dahlia viruses if you want to grow beautiful and healthy dahlias. Start dahlias from seed, which is the most economical beginning to virus-free plants. Seek new stock from growers who offer virus-tested dahlias or follow practices that minimize disease transmission. Propagate dahlias from plants in your low-risk group. When these tiny insects penetrate the dahlia's epithelium, they ingest the mosaic virus along with their meal of sap. As they move from plant to plant, the virus is spread to uninfected dahlia plants. Culling sick stock and sourcing clean stock are best practices for dealing with viruses in dahlias. Viruses can weaken plants and cause many symptoms: stunted growth, yellow mottling on leaves, vein clearing, color breaking or lighter streaking on petals, and curling, asymmetrical leaves. Research in Washington has found 3 viruses associated with mosaic symptoms including dahlia mosaic virus (DMV), dahlia common mosaic virus (DCMV), and an endogenous plant pararetroviral sequence (DvEPRS). At Garden Bee Flower Farm we monitor our dahlias for viruses. We disinfect our tools before cutting dahlias. We also disinfect during digging and dividing. We try to have a clean, disease free dahlia garden. We remove any sick or weak dahlia plants. Dahlia mosaic virus causes unusual symptoms and unfortunately there is no cure. Learn how to identify and manage this disease in this guide. There are thousands of dahlia cultivars you can plant in the garden, but like any plant, they can be vulnerable to diseases. Here's what to watch out for.

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