Hi! I frankly don’t know. I’m assuming it’s related to volume. i/e Dilute vs
concentrate ? Dilute rates result in more phytotoxicity than concentrate. This
is “known”, but I’m not sure we always account for that when experiments are
run with a “gun”. All else being equal, results at 250 L/ha are
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 Ph
Hi!
I heard at the Hudson Valley RIMpro meeting last
month that bicarbonate is used in Europe during rainfall
That would seem to necessitate repeated applications during an infections
period. Does it have no after-infection value?
In replicated tests over the years, we saw value in using bicarb
Vincent:
What can you tell us about the experience with bicarbonate? I think I
heard at the Hudson Valley RIMpro meeting last
month that bicarbonate is used in Europe during rainfall to kill what has
impinged on foliage, but not entered the leaf interior yet.
That would seem to necessit
Hi Dave, I use the European data on LLS. I never dug deeper. My interest in LLS
was mostly to compare it to Bicarbonate for organic growers. Maybe it can
achieve more kickback (?) I just know the bulk of organic European growers
stick with the 250DH criteria.
Vincent
> I thought that I had rea
Hi!
Normal only in the context of Organic Production only! Part of the
phytotoxicity is avoided by using a much reduced rate in summer.
I meant to say it’s not a rescue treatment for anyone.
it’s either ’normal’ (organic) or completely forgotten (IPM).
I would also say that LLS is quickly bein
I was surprised by Vincent’s comment that liquid lime sulfur is a “normal”
choice for post-infection in his area. My recollection
is that its use quickly went out of favor when ferbam and captan became
available, mostly because of reduced photosynthetic
ability of LLS-damaged leaves. Maybe the
LLS was out of favor here before I started spraying, but I do have some
references and dad used to talk about it -
from 1944 ‘Spray Chemicals’ - “The disadvantages are that liquid lime-sulfur is
very disagreeable to use owing to its causticity. Also this causticity is
blamed for subsequent fol
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 appli
If you worry about Captan phytotoxicity, then you should also worry about LLS
being phytotoxic under the same conditions. Liquid lime sulfur is a ’normal’
(ie not emergency) choice for post infection (kickback). However, I wouldn’t
trust it 96 hours after beginning of rain, unless the temperatur
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 Hor
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