Thank you for the photos of what appears to be viroid affected apples. For your information, we have photos on our web site of fruit tree diseases caused by virus and virus-like agents (http://nrsp5.prosser.wsu.edu/nrspviru.html ) that some of you might find useful.
Bill Howell National Clean Plant Network-Fruit Trees 24106 N. Bunn Road Prosser, WA 99350 http://nrsp5.prosser.wsu.edu -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Claude Jolicoeur Sent: Monday, December 06, 2010 7:44 AM To: Apple-Crop Subject: Re: Apple-Crop: Mystery disease? A 22:41 10.12.05 -0500, vous avez écrit : >>>> I suspect that the apple tree that bears these fruit is infected with the dapple apple/scar skin viroid. <<<< Thank you very much Dave and Jean-Marc. The informations you have provided are very informative and useful. In addition, I have found some pictures of this disease on the internet and unfortunately I have to agree with your diagnosis. I say unfortunately because from what I can see, there is no other issue than destruction of the affected tree. There doesn't seem to be any cure! And there is a risk of this viroid to spread to the rest of the orchard - a risk I am not ready to take! This seems to be a pretty exotic and rare disease. I probably have introduced it when I grafted some Wealthy apple on this seedling root in 1986. The source tree was obviously infected. To Jean-Marc, I also found a "fiche descriptive" en francais from the INRA here: http://www-intranet.angers.inra.fr/dossiers/virus/fichvir4.html where the first picture corresponds to the damage I can see on my tree. Also, the second picture on page 2 of the CTIFL document is very similar to my problem. Thanks for the help. Claude Jolicoeur Orchardist and cider maker Zone 4, Quebec -------------------------------------------------------------------------- The 'Apple-Crop' LISTSERV is sponsored by the Virtual Orchard <http://www.virtualorchard.net> and managed by Win Cowgill and Jon Clements <[email protected]>. Apple-Crop is not moderated. Therefore, the statements do not represent "official" opinions and the Virtual Orchard takes no responsibility for the content. -------------------------------------------------------------------------- The 'Apple-Crop' LISTSERV is sponsored by the Virtual Orchard <http://www.virtualorchard.net> and managed by Win Cowgill and Jon Clements <[email protected]>. Apple-Crop is not moderated. Therefore, the statements do not represent "official" opinions and the Virtual Orchard takes no responsibility for the content.
