Greenhouse Update - December 6, 2006
Leanne Pundt, Extension Educator, University of Connecticut
Hosta Virus X
Dr. Sharon Douglas (from the Connecticut Agricultural Experiment Station) was recently notified of a new state record for Hosta Virus X (HVX) in New London County, Connecticut. The first positive detection, by Agdia, Inc. was on 4 August 2005. The six hosta cultivars that tested positive were Francee, Ginko Craig, Hyacinthina, Minuteman, Patriot, and Wide Brim. The new state record has been submitted to the NAPIS database.
Hosta Virus X is a potexvirus. HVX-infected hostas may exhibit mottling or leaf distortion, or plants may be infected with the virus but not show any symptoms for weeks, months, or years. An ELISA serological test is the only way to confirm that a plant has HVX, as there are several hosta viruses.
There is no cure for this
virus once plants are infected, and those plants should be
destroyed. Following good sanitation practices and buying quality,
disease-free plants are critical to preventing Hosta Virus X in
nurseries or home gardens.
 'Sum and Substance' with the first signs of HVX infection. photo: www.hostalibrary.org |
 'Gold Edger' in sun. HVX symptom areas burn more easily. photo: www.hostalibrary.org |
Additional information can be found on the following websites:
Massachusetts Pest Alert
for Hosta Virus X
http://www.massnrc.org/pests/linkeddocuments/pestalerts/HostaVirusX_February_2006.htm
Hosta Library website
http://www.hostalibrary.org/firstlook/HVX.htm
Michigan State University
Landscape Alert, May 13, 2005
http://www.ipm.msu.edu/CAT05_land/L05-13-05.htm#2
Reported by Donna
Ellis,Extension Educator and State Survey Coordinator
USDA APHIS Cooperative Agricultural Pest Survey (CAPS) Program
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Information on our site was developed for conditions in the Northeast. Use in other geographical areas may be inappropriate.
The information in this material is for educational purposes. The recommendations contained are based on the best available knowledge at the time of printing. Any reference to commercial products, trade or brand names is for information only, and no endorsement or approval is intended. The Cooperative Extension system does not guarantee or warrant the standard of any product referenced or imply approval of the product to the exclusion of others which also may be available.All agrochemicals/pesticides listed are registered for suggested uses in accordance with federal and Connecticut state laws and regulations as of the date of printing. If the information does not agree with current labeling, follow the label instructions. The label is the law.Warning! Agrochemicals/pesticides are dangerous. Read and follow all instructions and safety precautions on labels. Carefully handle and store agrochemicals/pesticides in originally labeled containers immediately in a safe manner and place. Contact the Connecticut Department of Environmental Protection for current regulations.The user of this information assumes all risks for personal injury or property damage.Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Kirklyn M. Kerr, Director, Cooperative Extension System, The University of Connecticut, Storrs. The Connecticut Cooperative Extension System offers its programs to persons regardless of race, color, national origin, sex, age or disability and is an equal opportunity employer.