VASCM: Alternatives to netting for birds

[Rfalfaro at aol.com]

Using fruit zone nets cuts down dramatically the shading of the vines vs.  
overhead netting. It costs more but does not interfere with the 
photosynthesis  like the overhead netting does.... 
 
 
In a message dated 5/28/2013 10:31:36 A.M. Pacific Daylight Time,  
jmiller1068 at gmail.com writes:

Many  years ago on a visit to the National Radio Astronomy Observatory, I 
found they  were using sounds to keep birds away from their very sensitive 
radio  receivers. After lengthy experiment they came up with a random sound 
generator  that made an infinite series of sounds, some very bizarre, that 
never  repeated. They claimed it had been working for years. I urged the people 
 involved to contact grape and other growers, but I don't believe that ever 
 happened. I could try to find out if this is all lost to the  past.

Soloar energy people working with photovoltaics have looked for  good  
screening to protect their cells, but all screens and nets, even  chicken wire, 
block significant sunlight. The finest effective screen an  engineering  
friend of mine found was made out of very fine chicken wire,  and it blocked 
15% of the light. I'm probably alone in this, but I believe  that some people 
are using nets that block enough sunlight to delay their  grapes ripening by 
weeks. I've seen nets that are blocking over 50% of the  sunlight in many 
places because of their folds.I'm trying to get the equipment  available to 
measure the blockage of different nets. It has to be done  carefully. Of 
course there's more to ripening than sunlight, but somehow I  think 
photosynthesis is a central element, and less photons mean slower  ripening. Maybe out 
in the literature there are some studies of this already.  If anybody thinks 
this is a good thing for me to pursue, let me know.  

Joe

On May 22, 2013, at 7:47 PM, Jim Adkisson  wrote:

> I have purchased recorded sounds of a dozen birds of prey  that is 
supposed
> to keep birds away. Claims that it is used at golf  courses, airports and 
for
> crops. DOES NOT WORK. Happy to send copy of  WAV files for anyone 
interested.
> Netting is your salvation.
>  Jim Adkisson
> Falcon Hill 
> 
> -----Original  Message-----
> From: vascm-bounces at kkn.net  [mailto:vascm-bounces at kkn.net] On Behalf Of
> Candice Wozniak
>  Sent: Wednesday, May 22, 2013 6:25 PM
> To: Debbie Lehmann
> Cc:  VASCM at kkn.net
> Subject: Re: VASCM: Alternatives to netting for  birds
> 
> I want to try a computer operated sound/noise maker.  Does anyone have 
one I
> can have or borrow?
> I have a Rodenator  available for anyone to borrow.
> -Candice Wozniak
> 
> On  May 22, 2013, at 12:48 PM, Debbie Lehmann  <debbie.lehmann at gmail.com>
> wrote:
> 
>> Has  anybody used something other than nets to control birds after
>  veraison?
>> We are thinking about experimenting this year with one  of those sound
> boxes
>> that puts out predatory bird calls,  and maybe using reflective tape as
>> well. Does anybody have  experience with these? Do they work at all?
>> 
>>  Debbie
>> 
>> Portola Vineyards
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