Abstract
One-year-old grapevine rootstock cuttings of 41B Millardet Grasset, 140 Ruggeri, 161-49 Couderc, 1103 Paulsen, and 110 Richter were inoculated with pathogens associated with Petri disease and esca of grapevine to determine the effects of fungal infection on percentage of cuttings emerging from dormancy, shoot weight, and disease severity. The cuttings were vacuum-inoculated with spore suspensions of either Cadophora luteo-olivacea, five species of Phaeoacremonium, or Phaeomoniella chlamydospora and planted in two field sites in March 2008. Most of the fungal pathogens caused a significant reduction in the percentage of cuttings emerging from dormancy and shoot weight and a significant increase in disease severity in all grapevine rootstocks except 161-49 Couderc. Rootstocks 110 Richter and 140 Ruggeri were greatly affected by fungi associated with Petri disease and esca. In general, Pa. chlamydospora and Pm. parasiticum caused the greatest reduction in percentage of cuttings emerging from dormancy and shoot weight and the highest increase in disease severity. Regression analyses showed a significant correlation between percentage of cuttings emerging from dormancy and disease severity and between shoot weight and disease severity in almost all rootstocks inoculated with Pa. chlamydospora.
- Cadophora luteo-olivacea
- esca disease
- Petri disease
- Phaeoacremonium spp.
- Phaeomoniella chlamydospora
- Vitis vinifera
- Copyright © 2010 by the American Society for Enology and Viticulture
Sign in for ASEV members
ASEV Members, please sign in at ASEV to access the journal online.
Sign in for Institutional and Non-member Subscribers
Log in using your username and password
Pay Per Article - You may access this article (from the computer you are currently using) for 2 day for US$10.00
Regain Access - You can regain access to a recent Pay per Article purchase if your access period has not yet expired.