Rainbow Treecare Scientific Advancements makes a water soluble oxytetracycline tree injection that is labeled for bacterial leaf scorch for ornamental trees only, last I heard. You might want to contact them to see if they are pursuing labeling for crop-bearing trees, if this tree is extremely valuable.
From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of Dave Meyer Sent: Wednesday, June 17, 2009 5:41 AM To: Apple-Crop Subject: Re: Apple-Crop: Fireblight on Ernst Bosch Fireblight - have you tried Fertilome's Streptomycin? From: Axel Kratel<mailto:axel.kra...@yahoo.com> Sent: Wednesday, June 17, 2009 12:18 AM To: Apple-Crop<mailto:apple-crop@virtualorchard.net> Subject: Apple-Crop: Fireblight on Ernst Bosch Dear all, I have an "Ernst Bosch" apple tree on MM111 that has developed a pretty bad case of fireblight. I have over 200 trees and I've never seen fireblight here before, so this is a first for me. Symptoms included the classic die back with the orange colored droplets. I've cut the infected wood, and applied serenade, and I've had to go back twice now to cut more. I've cut back quite far, yet the cuts are still turning orange. I disinfected sheers in between cuts. On the last cuts I've resorted to treating the cuts with hydrogen peroxide, but it seems hopeless. Any hope of saving the tree or should I sacrifice it? It's on it's fourth leaf. I am surprised that this variety is so susceptible. The literature claims it's not especially sensitive to fireblight. Thanks for your advice. I am willing to forgo organic to save a tree, so if there's any sort of systemic treatment that would be possible, I would consider it. Serenade is a good preventative, but it's too late for this tree.
