[rimprona] Recent observations on RIMpro

[Randal Pratt]

 In addition I just compared the NEWA forecast for May 1st with the
Accuweather forecast for Highland, NY.  NEWA is forecasting 5 hours of leaf
wetness while the Accuweather forecast would indicate 17 hours of leaf
wetness on May 1st in Highland, NY.

I think I will just try to cover for both events.

Randy Pratt

On Thu, Apr 28, 2016 at 9:15 AM, Juliet Evelyn Carroll <jec3 at cornell.edu>
wrote:

> The fully interactive apple scab model is accessed from the Apple Diseases
> menu item choice under Pest Forecasts on the main menu,
> http://newa.cornell.edu
> From this page you can choose any location in NEWA and compare RIMpro for
> your locations in the US.
> Julie
>
> Sent from my iPhone
>
> On Apr 28, 2016, at 8:45 AM, Jon Clements <jon.clements at umass.edu> wrote:
>
> I believe Randy would be looking at this:
>
>
> http://newa.cornell.edu/index.php?page=weather-station-page&WeatherStation=khpn
>
> On Thu, Apr 28, 2016 at 8:03 AM, Marc Trapman <marc at rimpro.eu> wrote:
>
>> 1/ Can you please provide me link for the NEWA scab prediction so I can
>> see what is going on at try to explain differences ?
>> 2/ MeteoBlue again proves very accurate in Europe. I can imagine that the
>> quality for US is different.
>>
>> Thanks,
>> Marc
>>
>> Op 28 apr. 2016  (week17), om 13:53 heeft Randal Pratt <
>> rpratt713 at gmail.com> het volgende geschreven:
>>
>> Now we have a complete divergence between NEWA and Rimpro.  NEWA  is
>> showing a scab infection for the next three days and nothing for May 1st
>> and 2nd, while Rimpro has a very minimal infection for the next three
>> days and a tremendous infection for May 1st and 2nd.
>>
>> Hard to reconcile these differences.
>>
>> Randy Pratt
>> Wilkens Fruit Farm
>>
>> On Wed, Apr 27, 2016 at 11:59 AM, David A. Rosenberger <dar22 at cornell.edu
>> > wrote:
>>
>>> Following are a few observations on RIMpro graphs as I am currently
>>> seeing them for Highland, NY:
>>>
>>>   1. Based on RIMpro using our NEWA station data, we are now at or
>>> nearing full bloom, and we still have not had any infection events with RIM
>>> values above 38.
>>>
>>>   2. My perception (from my own observations over the past two years,
>>> plus what I hear from the Europeans) is that infection periods with RIM
>>> values below 300 are not economically important in CLEAN orchards at the
>>> BEGINNING and END of the ascospore release period.  More caution is
>>> warranted when there are infection periods during the peak ascospore
>>> release times between tight cluster and petal fall.  Thus, I hope that no
>>> one is continuing to leave trees totally unsprayed into full bloom just
>>> because RIMpro has shown no infection periods with RIM values over 300.
>>>  (Besides, in many areas, you need sprays by pink bud stage to control
>>> mildew even if scab is not a problem.)
>>>
>>>    4. Just a reminder about the graph at the bottom of the RIMpro
>>> output:  The bright red part of the graph shows mature spores, and that
>>> level will fluctuate as spores mature on days with no rain and then are
>>> released on days with rain.  The dark red or burgundy layer below that
>>> shows spores remaining in the leaf litter.  This declines in a more steady
>>> line, but the primary scab season will not be over until all of the deep
>>> red color at the base of the graph has disappeared.
>>>
>>>    5. I have been comparing outputs from the MeteoBlue and NEWA data for
>>> our Highland location.  Because they are using different weather forecast
>>> sources, the forecasts are often quite different, which is not unexpected
>>> since any and all weather forecasts have a high degree of inaccuracy.  I am
>>> more concerned that the MeteoBlue system is indicating extended wetting
>>> periods have occurred where that has not been the case based on NEWA data
>>> and (to some degree) my own observations. Thus, the MeteoBlue virtualy data
>>> is, in my opinion, still unable to accurately ascertain when leaves are wet
>>> or dry and will need more fine-tuning before it produces a reliable record
>>> of infection events.
>>>
>>> ********************************************
>>> Dave Rosenberger, Plant Pathologist (retired)
>>> Hudson Valley Lab, P.O. Box 727, Highland, NY 12528
>>>     Cell:     845-594-3060
>>> ********************************************
>>>
>>>
>>> _______________________________________________
>>> RIMproNA mailing list
>>> RIMproNA at virtualorchard.com
>>> http://virtualorchard.com/mailman/listinfo/rimprona
>>>
>>>
>>
>>
>> --
>> *Randal Pratt*
>> 1335 White Hill Road
>> Yorktown Heights, NY 10598
>> 914-245-4098
>> 914-245-5111
>> Fax 914-245-4099
>> _______________________________________________
>> RIMproNA mailing list
>> RIMproNA at virtualorchard.com
>> http://virtualorchard.com/mailman/listinfo/rimprona
>>
>>
>> Marc Trapman
>> Bio Fruit Advies / RIMpro
>> marc at rimpro.eu
>>
>>
>>
>>
>>
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>>
>>
>
>
> --
> Jon Clements
> aka 'Mr Honeycrisp'
> UMass Cold Spring Orchard
> 393 Sabin St.
> Belchertown, MA  01007
> 413-478-7219
> umassfruit.com
>
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>


-- 
*Randal Pratt*
1335 White Hill Road
Yorktown Heights, NY 10598
914-245-4098
914-245-5111
Fax 914-245-4099
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