A decade of grapevine red blotch disease epidemiology reveals zonal roguing as novel disease management - npj Viruses npj Viruses - A decade of grapevine red blotch disease epidemiology reveals zonal roguing as novel disease management

From Napa to New Zealand, #GRBV is a global grapevine 🍇threat
Let’s continue raising awareness, improving diagnostics, and researching management.
Stay tuned next month for another #PlantVirusOfTheMonth
#PlantVirology #GRBV

www.nature.com/articles/s44...

New evidence confirms it: the three-cornered alfalfa hopper (Spissistilus festinus) transmits Grapevine Red Blotch Virus (GRBV) directly in vineyards! A big step for understanding GRBV spread.
Read more: www.mdpi.com/1999-4915/15...

#PlantVirology #GRBV #Viticulture

#GRBV triggers stress signals in vines — shikimic acid & resveratrol spike. It scrambles hormone signals (ABA, auxin, ethylene), delaying ripening & causing metabolic chaos The result? Reduced yield, poor berry chemistry & big losses in wine quality
#PlantVirology

doi.org/10.3390/plan...

The DSMZ Plant Virus Department provides #GRBV controls. I'm eager to see first symptoms in a few weeks.
#PlantVirology

Red blotch disease alters grape berry development and metabolism by interfering with the transcriptional and hormonal regulation of ripening Highlight. Grapevine red blotch interferes with the hormonal and transcriptional regulation of berry development, leading to suppression of secondary metab

Symptoms in red grape cultivars = red blotches & leaf reddening 🍁
In white grapes = chlorosis, sometimes necrosis
But #GRBV goes deeper: it disrupts ripening pathways and berry metabolism!

doi.org/10.1093/jxb/...

#PlantVirology #grapevine

The #GRBV genome is circular, single-stranded DNA with 8 ORFs and an unusual twist—spliced transcripts!
This boosts its coding power, rare for #geminiviruses.

www.microbiologyresearch.org/content/jour...

#PlantVirology #GRBD #grapevine

Association of a DNA Virus with Grapevines Affected by Red Blotch Disease in California | Phytopathology® ABSTRACT In the Napa Valley of California, vineyards of ‘Cabernet Franc’ (CF) clone 214, ‘Cabernet Sauvignon’ clone 337, and ‘Zinfandel’ clone 1A (Z1A) with grapevines exhibiting foliar symptoms of re...

#GRBV causes Grapevine Red Blotch Disease (GRBD), first noticed in California in the 2000s 🍷
Red blotches on leaves & delayed ripening were key signs.
It was confirmed as a new virus in 2012–2018.

Rwahnih et al., 2013: doi.org/10.1094/PHYT...

#PlantVirology #GRBD

Grapevine red blotch disease: A comprehensive Q&A guide

New month, new plant virus!
After #ToBRFV in March, we spotlight #GRBV – Grapevine Red Blotch Virus – for April 2025
It’s a DNA virus from the Geminiviridae family, threatening wine & table grape production!
doi.org/10.1371/jour...

#PlantVirology #geminivirus