UV light does not penetrate surfaces, so it could only kill what is on the
surface and only what receives the required UV dosage. Any bacterial in
shadows created by limbs, leaves, branches, or flower parts would remain
untreated, and in the case of fire blight, the rapid multiplication of
I’m surprised that your graphic (and I think I heard the same from Marc
Trapman) suggests that in Europe they recommend using LLS only on wet leaves
whereas the old info from Burrell suggested that it should NOT be applied to
wet leaves. Any explanation?
> On Apr 7, 2016, at 5:31 PM, Vincent
Art Burrell, working in the Champlain Valley of NY where spring temperatures
are often cool, would agree with you. The sentences after the section that I
quoted in the previous post says:
“We have a period up to 60 or 70 hours, after the start of theinfection
period, during which a heavy
Sorry if this is a duplication: I tried attaching Art Burrell’s discussion of
sulfur sprays with the following message, but I think that made the message
size too large for this list-serve.
I can only reprint what Dr. Art Burrell said in 1945 at the 90th Annual Meeting
of the New York State
A colleague at NC State, Dr. David Ritchie, passed along the following info
that I thought would be of interest to the group.
Ed Sisler, "the father of 1-MCP” , died recently.
https://biochem.ncsu.edu/images/highlight/2006%20Father%20of%201-MCP.pdf
ical as well as
forecast data, alleviating the need for a hardware on-site weather station. My
understanding all this is in the works, and should be available by early March
on the RIMpro site, rimpro.eu<http://rimpro.eu/>.
Jon
On Sat, Feb 13, 2016 at 10:53 PM, David A. Rosenberger
&l
You can access a brief description of RIMpro in the blog commentary that I
posted at http://blogs.cornell.edu/plantpathhvl/blog/ on Jan 21. The blog post
provides a link to a PDF file that contains a 3-page description of RIMpro
along with my impressions of the program after evaluating it for
So far as I know, wind chill is pretty much irrelevant when it comes to plants
and other life forms that are not warm-blooded creatures. Wind-chilll provides
an estimate of how we perceive the cold, but the measured temperature on the
thermometer is still the temperature experienced by trees.
Hello, David —
Did you apply any postharvest treatments to the affected fruit? Do the spots
appear at points of fruit contact in the boxes as the fruit come out of
storage? If answers to these two questions are positive, then toxicity from
postharvest treatment solutions due to slow drying
Strep is extremely stable if it is kept dry and out of direct light (e.g., in a
closed cardboard drum or foil package). It does break down in sunlight. I
don’t know if other components in the formulations might “age out” and become
less effective (e.g., less surfactant activity), but the strep
I’ve never used a flame weeder, but I’ve been on a number of tours where they
were either demonstrated or discussed. Folks who have actually worked with
them are probably either retired or too busy to comment, so I’ve summarized my
recollections from those tours below. If my memory is faulty,
Based on what i think I know (and someone correct me if I’ve missed something),
GMO pollen carried by bees to your apple orchards will NOT generate GMO content
in your apples unless you actually test the apple seeds that form inside the
fruit. Unlike corn, wheat, and other grain crops where we
I agree with Peter Werts' comments. At the Hudson Valley Lab, Peter Jentsch
and I set up a tall spindle orchard (3 ft X 11 Ft) about 5 years ago. We
decided to spray it with a home-made vertical boom attached to a 3-pt hitch
Pac-Tank sprayer, using air-induction nozzles as Peter Werts
Hello, Vincent —
I believe that the problem Brian had in the year where 6 step sprays were
required was lack of chilling hours to complete dormancy. If apples do not get
enough chilling, they produce flower buds over a very long interval, and new
flowers just keep opening.
Concerning
of CrimsonCrisp and haven't
thought about putting copper on them. Good advice. Thanks.
On 3/21/2015 10:36 AM, David A. Rosenberger wrote:
While Kasugamycin works about as well as streptomycin, oxytetracycline is
generally a bit less effective and has the disadvantage of preventing bacterial
species in the sprayed
blocks may have detectable levels of strep-resistance.
On Mar 23, 2015, at 9:04 AM, David A. Rosenberger
da...@cornell.edumailto:da...@cornell.edu wrote:
Thanks for the follow-up information, Brian. Using six strep sprays during
bloom, while I can see how it may be necessary
Thank you, Kevin, for your comments on how GMOs are needed in many countries to
ensure a reliable food supply. At our national plant pathology meetings last
summer, we heard a keynote speaker, a female scientist from South Africa,
address that same issue. In fact, she pointed out that
to be
autistic. Here - let's have a taste of what I am offering, no GMO
herethat bag is $7, thanks very much -
It's tempting -
D
On Feb 26, 2015, at 11:07 AM, David A. Rosenberger wrote:
Thank you, Kevin, for your comments on how GMOs are needed in many countries
to ensure
In most cases, damage along the trellis will diminish with distance because
metal posts and/or trees attached to the trellis will act as grounds to
dissipate the charge. How many trees are killed or damaged will depend on many
different factors, including the strength of the initial lightening
Hello, Hugh —
I was interested in your comment about controlling apple root suckers with
Chaparral herbicide because root suckers have become a major headache in some
of our older research plots. However, when I checked the Chaparral label on
the CDMS website, I can’t find any label that
We experimented with a ULV shielded applicator (Bubco) for herbicide
applications in our research orchards many years ago. In our hillside
orchards, the shield was never low enough on the down-hill side, and we killed
a number of trees by hitting trunks with concentrated glyphosate. Unless
...@virtualorchard.netmailto:apple-crop-boun...@virtualorchard.net]
On Behalf Of David A. Rosenberger
Sent: Friday, August 15, 2014 8:31 PM
To: Apple-crop discussion list
Subject: Re: [apple-crop] Apples From China?
So far as I know, there is no political quid pro quo for decisions on what
products
So far as I know, there is no political quid pro quo for decisions on what
products can be imported into the US or exported to other countries, and
scientific concerns about importation of pests are given serious consideration.
Nevertheless, Bill’s suggestion about trading apples for
-boun...@virtualorchard.net] on behalf of David A. Rosenberger
[da...@cornell.edu]
Sent: Tuesday, April 29, 2014 10:46 AM
To: Apple-crop discussion list
Subject: Re: [apple-crop] apples and chemicals
Hello, Con —
Since grilling meat on a barbecue almost always creates some nitrosamines,
I’m
Hello, Con —
Since grilling meat on a barbecue almost always creates some nitrosamines, I’m
assuming that outdoor barbecues have also been banned in Europe? :)
Dave Rosenberger, Professor Emeritus
Dept. of Plant Pathology and
I’ll add a bit to what Dan presented below: First, I doubt that anyone has
good evidence of captan causing or contributing to russet when it is applied
alone. In fact, in many field trials where impacts of fungicides on fruit
finish have been evaluated, captan applied at late bloom, petal
Hi, Greg —
I’m really curious to hear what others suggest. Old-timers in northern NY
would sometimes use shingle nails to nail the loose bark back to the trunks of
big old winter-injured trees when the bark split away from the trunks due to
cold injury during winter. I’m not certain if it did
Hello, Art —
What is the strain of McIntosh that has the unusual growth habit and retained
petioles? I’m not certain about the curved shoots, but over the years we have
occasionally noted retained petioles on various strains of Macs as they pass
from the juvenile phase to full bearing. The
We first planted Honeycrisp trees at our research lab in 1995, and we’ve added
more HC in various plantings over the years. From my perspective, we are a bit
too far south (90 miles north of Manhattan) to get consistently high quality
with Honeycrisp. Some years they color well and taste
Hail injury from at storm in early to mid-season? What are the internal
symptoms when cut perpendicularly through the lesions?
On Oct 7, 2013, at 3:18 PM, Jon Clements jmcext...@gmail.com
wrote:
See attached...
photo.JPG
413-478-7219___
in fresh air, but is
this something we want/need/expect the consumer to do?
If I were a big time marketer, I'd see an opportunity to sell high end
'clean-air certified' or somesuch fruit
David
On Sep 20, 2013, at 11:03 AM, David A. Rosenberger wrote:
We did some work in 2000 comparing
Streptomycin is very stable when kept dry and away from light. However, it
will break down in light. If your zip-lock bag was clear plastic and located
on a windowsill, the product may have degraded at least to some extent.
Otherwise, it should be OK.
On Feb 21, 2013, at 2:55 PM, Rye
Hello, Rye --
Strep does NOT move systemically in plants. It may be absorbed into surface
cells, but so far as I know it won't be taken up through roots. If there was an
easy way to control blight, someone would have found it by now: we've only
been studying it for several centuries.
Black on
33 matches
Mail list logo
