Just my personal experience, dont know if any studies made, I think a lot of the problem is copper deficiancy, after doing leaf analysis, my copper levels were in the bottom of the scale, alsso in soil analysis, added Kocide 3000 to dormant spray, and small amount (2oz per 100 gal) in spring sprays, also copper added to herbicide spray, copper levels in leaf analysis came up but stil not normal, I have less FB and can see the difference. Also, nothing beats staying on top of the situation by walking the orchard every morning and cut it out before it spreads, this works well for small orchards like mine. Most of my FB is shoot blight, I think strep sprays are a waste of $$$. This my be because the strep is old, does anyone know how to read date of manufacture on the bag?? Lee Elliott, Apple Hill/ Upstart Nursery, Winchester, Illinois -------------------------------------------- On Sat, 8/15/15, apple-crop-requ...@virtualorchard.net <apple-crop-requ...@virtualorchard.net> wrote:
Subject: apple-crop Digest, Vol 56, Issue 8 To: apple-crop@virtualorchard.net Date: Saturday, August 15, 2015, 11:00 AM Send apple-crop mailing list submissions to apple-crop@virtualorchard.net To subscribe or unsubscribe via the World Wide Web, visit http://virtualorchard.net/mailman/listinfo/apple-crop or, via email, send a message with subject or body 'help' to apple-crop-requ...@virtualorchard.net You can reach the person managing the list at apple-crop-ow...@virtualorchard.net When replying, please edit your Subject line so it is more specific than "Re: Contents of apple-crop digest..." Today's Topics: 1. Re: Looking for comments on fire blight management (Weinzierl, Richard A) ---------------------------------------------------------------------- Message: 1 Date: Fri, 14 Aug 2015 21:26:58 +0000 From: "Weinzierl, Richard A" <weinz...@illinois.edu> To: Apple-crop discussion list <apple-crop@virtualorchard.net> Subject: Re: [apple-crop] Looking for comments on fire blight management Message-ID: <f1da5cce7c3ebe43b873f3bd2ba709a73d62b...@citesmbx6.ad.uillinois.edu> Content-Type: text/plain; charset="utf-8" U of I Kane County Extension Office, 535 South Randall Road, St. Charles, IL Rick From: apple-crop-boun...@virtualorchard.net [mailto:apple-crop-boun...@virtualorchard.net] On Behalf Of Vincent Philion Sent: Friday, August 14, 2015 12:49 PM To: Apple-Crop <apple-crop@virtualorchard.net> Subject: Re: [apple-crop] Looking for comments on fire blight management Hi Tim! nice to read you! I think there are more sources of fire blight bacteria in the general environment in the northeastern USA due to your woodlots and forests (with feral apples and native hosts such as Hawthorne) as contrasted with the treeless conditions around many eastern Washington orchards. I agree! But still is fascinating to see whole areas without FB and others with FB, despite similar weather. We often make ?false positive? predictions because of this = conditions are great for FB, but not FB develops because bacteria are simply not there. We have nice qPCR data throughout bloom to prove it. The bacteria (in the hypanthium) need to thrive in the nectary in order to reach numbers sufficient to switch on their virulence. Once this is accomplished you have an infection. Do you have a good reference for me on this specific topic? When I reviewed the literature, I only found a few things from Pusey. This might explain some cases. We can learn a great deal about interpreting models by looking at the weather data around the time that we are fairly certain that isolated infection events occurred. We can also look at when expected infections did not occur. It would be very helpful to me if any of you would share weather data including rainfall, hourly temperature (or daily temps) and especially leaf wetness readings. Please send data that covers days from first bloom to about 3 to 4 weeks after petal fall. Excel files are a real time saver. We?re Also looking for the same type of data?! Vincent -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://virtualorchard.net/pipermail/apple-crop/attachments/20150814/cce4e9cf/attachment-0001.html> ------------------------------ _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop End of apple-crop Digest, Vol 56, Issue 8 ***************************************** _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
