[Apple-Crop] Cueva/Double Nickel

[Kerik D. Cox]

Hi Vincent,

We've found that concentration is potentially more damaging with copper 
than higher volumes as the both 50gal and 100gal get the same amount of 
copper. It's like taking powdered aspirin with half the recommended 
amount of water. Also, many labels in the US actually require that 
certain products be applied in a minimum of 100 gal/A. If were 
potentially injurious to apply at 100 gal/A, I assure you that no 
company would include any such statements on label. Actually, they 
would, without a doubt, put statements saying that the product should 
not be applied at 100 gal/A or injury would occur. Excess water seems to 
just roll off the trees in our  experiments.

Best,
Kerik
> I hope you meant a Low volume of water. High volume = slow drying = 
> russeting. This is very easy to demonstrate. We do it as a "control" 
> in plots. We always have copper induced russeting at 500 L/ha and none 
> at 225 L/ha.
>
> Vincent Philion, agr., M.Sc.
>
> Le 1 mai 2017 à 08:05, Two Onion Farm <farmer at twoonionfarm.com 
> <mailto:farmer at twoonionfarm.com>> a écrit :
>
>> Kerik Cox at Cornell has done trials with this combination for cedar 
>> apple rust, summer fungal diseases, and fireblight and has had good 
>> results.
>>
>> We started using the combination in our organic orchard last year and 
>> did not see any problems with fruit russeting.  Kerik did caution me 
>> to use a high volume of water to avoid toxicity from the copper (100 
>> gallons per acre vs our normal 50 in our high density orchard).   We 
>> have used 2 qts/acre Cueva + 2 lbs/acre 2ble nickel.
>>
>> Kerik also suggested that the 2ble nickel might be unnecessary and 
>> that cueva alone might be sufficient, but that may be theoretical at 
>> this point.  The 2ble nickel does add a lot of cost.
>>
>> Chris
>>
>> Chris & Juli McGuire
>> Two Onion Farm
>> www.twoonionfarm.com <http://www.twoonionfarm.com/>
>> 19638 Cottage Inn Road
>> Belmont, WI 53510
>> (608) 762-5335
>> farmer at twoonionfarm.com <mailto:farmer at twoonionfarm.com>
>>
>>
>> On 5/1/2017 6:43 AM, maurice tougas wrote:
>>> A couple years ago I recall discussion regarding the use of 
>>> Cueva/Double Nickel combination as an alternative and/or rotation 
>>> with strep for fireblight management. Is anyone aware of further 
>>> research regarding this combination esp as to regards to crop safety 
>>> and efficacy ?
>>>
>>> Mo Tougas
>>>
>>> -- 
>>> Maurice Tougas
>>> Tougas Family Farm
>>> Northborough,MA 01532
>>> 508-450-0844
>>>
>>>
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-- 
Kerik D.  Cox, Ph.D., Associate Professor
Plant Pathology and Plant-Microbe Biology Section
School of Integrative Plant Science
Cornell University
221 Barton Lab
NYSAES
630 West North Street 		
Geneva, NY 14456 USA 	

E-mail: kdc33 at cornell.edu
Faculty Office: (315) 787-2401
Fruit Pathology Lab: (315) 787-2402	
FAX: (315) 787-2389

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