North American Fruit Explorers mailing list at ibiblio

[Jwlehman@aol.com]

Group,

My belated congratulations and gratitude for his service to NAFEX interests 
also go out to Dr. Parmar.  Dr. Parmar may have the world's greatest 
knowledge of rare fruits world wide and we are so fortunate to have him as a 
comrade.

In India there is a custom that a student kiss the feet of a great teacher 
who has imparted much. Dr. Pamar is deserving of our kiss. 

Jerry      
>From loneroc1@gmail.com  Tue Feb  5 06:35:59 2013
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From: Steve Herje <loneroc1@gmail.com>
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Subject: Re: [nafex] frost vs freezing--effects on plants?
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Hi all,

My experience is that actual frost or wind can be much more damaging than
just the cold alone.  I live in the location that had the coldest
temperature ever recorded in the lower 48 states until fairly recently,
-53F.  The the lower Wisconsin River drains like huge area and the bluffs
close in on either side of the river about a mile from me.  On dead calm
nights the denser, cold air dams up and the temperature drops.....In mid
April a number of years ago a frost was forecasted.  Things were well
leafed out.  It was 40F at sunset.  The winds died down and the temperature
started dropping so quickly I could watch the mercury (and alcohol-I had 2
thermometers) descend.  I stayed up all night to monitor the temp when I
realized what was happening.  Over the next 6 hours temps dropped to minus
22F.  A 62 degree drop and 18 degrees colder than the lowest temp ever
recorded in April in Wisconsin.  Just before sunrise the temp had risen to
28.  Of course there was no point in reporting the bizarre event since I
wasn't an "official" weather recorder and no one would have believed me
(except my NAFEX friends;-)  But given the consistent readings between the
two thermometers I'm sure that the actual temperature was VERY low whatever
the exact temp was.

  I bring this up because there was absolutely no damage whatsoever--none.
And I expected everything to be dead.  I speculate that since temps dropped
and thawed so quickly there was no time for ice crystals to form.

Steve H. SW Wisconsin USDA zone 3.
On Jan 24, 2013 7:04 AM, "Matt Demmon" <mdemmon@gmail.com> wrote:

> Yeah, I've noticed that in growing outdoors, it's not the temperature, it's
> the frost. 30 and everything completely covered in frost will kill many
> things while 25 and no frost results in only minor damage.
>
> -matt
> s5 se MI
>
> On Wed, Jan 23, 2013 at 10:00 AM, Scott Breneman <
> sbreneman@yourgoodwill.org
> > wrote:
>
> > Hi all,
> >
> > Been growing vegetables and subtropical container plants for a long time
> > and have seen plenty of frost-blackened vegetables outdoors.  What I
> don't
> > understand very well is why 28 degrees in my sunporch didn't harm my
> tomato
> > plants the other night and 24 last night didn't seem to affect my
> > subtropicals--guava, jaboticaba etc.  The frost formation is more deadly
> > than the sub-freezing temperatures?
> >
> > Scott
> >
> > near Lancaster, PA
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