pests and diseases of hops - university of vermont...pests and diseases of hops or why the ^%$#^ do...
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Pests and diseases of Hops
Or
Why the ^%$#^ Do I Get All These Things
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Carlaviruses
• Hop Latent Virus, American hop latent virus, & Hop Mosaic virus. HLV & AHLV called latent because they don’t seem to do very much. May cause yield reduction of up to 15%. HMV can cause sever damage, reduce yield by 60%+, especially in Golding type hops
• Field Guide for integrated pest Management in Hops, Third Edition
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Other viruses
• Hop Stunt Viroid – found in US in 2004, seems to be spread by Mechanical (pruning, stripping, crowning, etc) means & propagation. May take 3-5 yrs to show. Side arms are smaller & hop cones are smaller. Very serious problem
• Apple Mosaic Virus – Most important virus disease in hops. Severe reduction in yield & Alpha acids, difficulty in propagation
• Field Guide for integrated pest Management in Hops, Third Edition
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• Viruses present
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