VASCM: Alternatives to netting for birds

[Jim Varano]

I can't delete this e-mail....won't stay gone....anyone else have this issue?

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On May 28, 2013, at 10:41 AM, Joe Miller <jmiller1068 at gmail.com> wrote:

> That's good to know, Richard. My comments were about the vagaries of overhead netting, but from what you say you don't need to use it at all with equally good results. I do know of vineyards that I believe are stretching their Pinot season well into October because of netting blocking, but until I have the right measuring equipment I can't prove it.
> 
> Joe
> 
> On May 28, 2013, at 10:35 AM, Rfalfaro at aol.com wrote:
> 
>> 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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>> 
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