Hop stunt viroid

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symptoms of Hop stunt viroid infection on hop plant (click on image to enlarge it)
Author(s): David Gent, USDA Agricultural Research Service
Source: IPM Images

Hop stunt viroid (HSVd)

This viroid is widely distributed and has a large host range, including hop, citrus, plum and grapevine. It is common on fruit trees and grapevines, but infections are often latent. On hop plants it causes leaf curling, small cones and stunting. It can be transmitted mechanically and during grafting. The viorid has 294 to 303 nucteotides.

Vernacular names
• Deutsch: Hopfenstaucheviroid
• English: Hop stunt viroid (HSVd)
• Français: viroïde du rabougrissement du houblon