That sounds like a great project Dave. If you have success implementing it, could you share the results with us?
Bill Shoemaker, University of Illinois > Thanks to all of you who responded to my > query about copper. I was actually looking for > an OMRI approved product that specifically was > labeled for summer diseases on apples, or that at > least allowed such applications. Most coppers > labeled for apples specify a green tip spray for > fire blight, blossom sprays for fire blight, and > then "sprays before fall rains" for anthracnose > and other diseases. I suppose that a July > application could be construed as being "before > fall rains," but our NY regulators might not buy > that. (Yes, it's true that NY regulators found > banking was too difficult to understand, but they > still think that they can understand and regulate > pesticides more effectively than the US EPA!) > Anyway, my objective is to test a > combination of a low rate of Liquid Lime Sulfur > (1 qt/100 gal of dilute spray) combined with a > low rate of copper to see if we can get > reasonable control of both summer fruit rots > (mostly black rot, Botryosphaeria obtusa, in our > area) and the sooty blotch and flyspeck complex. > I have tested the low rate of Liquid Lime Sulfur > (LLS) several times in previous years and it > seems to work quite well for flyspeck and sooty > blotch. However, LLS did not control fruit rots > and at higher rates it may have even stimulated > fruit rots, perhaps by injuring cells that can > then be invaded by Botryosphaeria. > I've tested the LLS/copper combination > before using a non-OMRI-approved copper and it > did not cause any more harm to the fruit that one > might expect from copper sprays. However, we did > not have good disease pressure in that trial, so > I'm hoping to repeat it this summer. > >> >>From: Yoder, Keith >>Sent: Wed 2009-05-13 06:39 >>To: Apple-Crop >>Subject: RE: Apple-Crop: copper fungicides for organic apples? >> >> >>Dave, >> >>Here is a possibility with summer labeling: Agri >>Star® Basic Copper 53 (Albaugh, Inc./Agri Star) >> >>http://www.cdms.net/LDat/ld0BO001.pdf >> <http://www.cdms.net/LDat/ld0BO001.pdf> >> >>It is registered for summer use on apples and is also listed with OMRI. >> >>OMRI says: Basic Copper 53, Classification: >>"When used for plant disease control must be >>used in a manner that minimizes accumulation of >>copper in the soil. May be used as an algicide, >>insecticide, or disease control if the >>requirements of 205.206(e) are met, which >>requires the use of preventative, mechanical, >>physical, and other pest, weed, and disease >>management practices". >> >>The contact listed with OMRI is: Albaugh, Inc.: Mark Blume, Ph: >> 515-964-9444. >> >>Summer diseases on the CDMS-posted Basic Copper >>53 label include Brooks spot, sooty blotch and >>bitter rot. The label warns about copper injury >>and calls for different rates and different >>amounts of lime to be added to the mix at >>different times of the season. >> >>We tested a product with the same name and >>similar label wording but from a different >>distributor in 1995. The reference for that >>report is Fungicide and Nematicide Tests, Vol. >>51:31-32 (1996). "Summer disease control by >>copper formulations and fungicide mixtures on >>Nittany apple, 1995". >> >>Our interest in testing this was for summer >>disease control on processing apples, where >>russet isn't as much of a concern as for fresh >>market. We used Basic Copper "53" 2 lb/A from >>greentip- petal fall, then Basic Copper "53" 4 >>lb/A + Hydrated Lime 12 lb/A (first-fourth >>covers) followed by Basic Copper "53" 4 lb/A + >>Hydrated Lime 8 lb/A (fifth and sixth covers). >>Treatments were applied airblast to large trees >>at 100 gal/A. >> >>That year we had one of the heaviest bitter rot >>tests we've ever had. We got decent bitter rot >>control, better than a schedule involving >>Polyram 80DF 3 lb/A + Ziram 3 lb/A through >>second cover then Captan 50W 3 lb + Ziram 76DF 3 >>lb/A, third to sixth covers. The copper schedule >>was weak on flyspeck (which has been true with >>other coppers in other tests). In our test, 19 >>wetting periods at 70 F or warmer occurred from >>mid-May to mid-August contributed to the heavy >>summer disease pressure. Cumulative wetting >>hours recorded starting 10 days after petal fall >>reached 250 on 26 Jun at the beginning of an >>84-hr wetting period, then six inches of rain >>and 142 more wetting hours between 22 and 30 >>June. We got a lot of fruit russet from the full >>season copper schedule: only 7% of the fruit >>made the USDA Extra Fancy / Fancy grades due to >>russetting. >> >>I can send label and report files to anyone who >>requests them at my e-mail address: >>ksyo...@vt.edu <mailto:ksyo...@vt.edu> >> >>Keith >> >>Keith S. Yoder, Research and Extension Tree Fruit Pathologist >> >>Virginia Tech AREC, 595 Laurel Grove Rd., Winchester, VA 22602 >> >>Tel: 540-869-2560 Ext. 21 >> >>________________________________ >> >>From: apple-crop@virtualorchard.net on behalf of Dave Rosenberger >>Sent: Tue 2009-05-12 22:30 >>To: apple-crop@virtualorchard.net >>Subject: Apple-Crop: copper fungicides for organic apples? >> >> >> >>Can anyone point me to a copper fungicide that is OMRI approved for >>organic farmers AND that also has a US EPA label that allows repeated >>applications to apples during summer. I know that I should be able >>to find this info on the OMRI web-site, but I found that site >>extremely confusing when I tried it a year or two ago. >>-- >>************************************************************** >>Dave Rosenberger >>Professor of Plant Pathology Office: 845-691-7231 >>Cornell University's Hudson Valley Lab Fax: 845-691-2719 >>P.O. Box 727, Highland, NY 12528 Cell: 845-594-3060 >> http://www.nysaes.cornell.edu/pp/faculty/rosenberger/ >> >> >> >>-------------------------------------------------------------------------- >> >>The 'Apple-Crop' LISTSERV is sponsored by the Virtual Orchard >><http://www.virtualorchard.net >><http://www.virtualorchard.net/> > and managed >>by Win Cowgill and Jon >>Clements <webmas...@virtualorchard.net>. >> >>Apple-Crop is not moderated. Therefore, the statements do not represent >>"official" opinions and the Virtual Orchard takes no responsibility for >>the content. >> >> >> >> >> >> >> >> >>Content-Type: application/msword; >> name="FN95NIT.doc" >>Content-Description: FN95NIT.doc >>Content-Disposition: attachment; >> filename="FN95NIT.doc" >> >>Attachment converted: davidrosenberger:FN95NIT.doc (WDBN/«IC») (000749D3) >>Content-Type: application/pdf; >> name="Basic Copper 53.pdf" >>Content-Description: Basic Copper 53.pdf >>Content-Disposition: attachment; >> filename="Basic Copper 53.pdf" >> >>Attachment converted: davidrosenberger:Basic >>Copper 53.pdf (PDF /«IC») (000749D4) > > > -- > ************************************************************** > Dave Rosenberger > Professor of Plant Pathology Office: 845-691-7231 > Cornell University's Hudson Valley Lab Fax: 845-691-2719 > P.O. Box 727, Highland, NY 12528 Cell: 845-594-3060 > http://www.nysaes.cornell.edu/pp/faculty/rosenberger/ > Bill Shoemaker University of Illinois St Charles Horticulture Research Center