Thank you David. That makes sense. I suppose such a simple solution would have been discovered long ago.
It's a bit encouraging to hear that strep may penetrate surface cells. So last year's spraying may have treated a litle more than just bacteria on the outside of the trees. It's even more encouraging to hear that the black spots aren't necessarily FB. I will look into the latex paint. Thanks for the suggestion. Rye Hefley So Cal ------------------------------ On Wed, Feb 13, 2013 6:55 PM PST David A Rosenberger wrote: >Hello, Rye -- >Strep does NOT move systemically in plants. It may be absorbed into surface >cells, but so far as I know it won't be taken up through roots. If there was >an easy way to control blight, someone would have found it by now: we've only >been studying it for several centuries. >Black on the bark may be dead cells killed by sunburn or by fungi invading >heat-injured and/or desiccated cells. So long as you have live bark >underneath, it probably doesn't matter much. If it is on the lower part of >the tree, you can protect trees from sunburn by applying a white latex paint. > >On Feb 13, 2013, at 8:30 PM, Rye Hefley ><ducn...@yahoo.com<mailto:ducn...@yahoo.com> wrote: > > >Hi Apple gurus, > >Answers don't jump out at me feom google. > >I'm curious why we don't put agri-mycin in the irrigation water to treat from >the inside out? (As in we administer antibiotics to humans through the >stomach for 10 days.) Why is spray the appropriate delivery? > >I'm not growing fruit this year (renoving flowers). I'm not concerned about >fruit saturation/consumption. I have pruned fireblight cankers what I can but >I'm sure I didn't get it all nor did I pick up every last leaf particle. > >Just grasping for a way to innoculate from the inside. Every pruning cut >showed healthy wood inside but some trees have black splotches on the outer >bark almost always on the south sid of the tree. I even scraped some of the >black from pruned wood and the inner wood is very healthy looking immediately >under the bark. I have a fantasy that that is sunburn here un sunny So Cal. >Not realistically hopeful of that. > >Thanks, >Rye Hefley >So Cal >_______________________________________________ >apple-crop mailing list >apple-crop@virtualorchard.net<mailto:apple-crop@virtualorchard.net> >http://virtualorchard.net/mailman/listinfo/apple-crop > > >************************************************************** > Dave Rosenberger, Professor of Plant Pathology > Cornell University's Hudson Valley Lab > P.O. Box 727, Highland, NY 12528 > Office: 845-691-7231 > Fax: 845-691-2719 > Cell: 845-594-3060 >http://www.nysaes.cornell.edu/pp/faculty/rosenberger/ > _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
