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 likely
different from 1000 L/ha… Or 2500 L/ha! (ie about 30 GPA vs 300 GPA).
> Le 7 avr. 2016 à 21:02, David A. Rosenberger <da...@cornell.edu> a écrit :
> 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 Philion <vincent.phil...@irda.qc.ca>
>>> 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 bicarbonate in a
>> “short” post-infection window. (250DH). However, If spraying your orchard
>> takes more than 12 hours, these “soft” molecules are not for you. In the
>> same tests, Inspire Super or Fontelis or Aprovia are better. No question.
>> We use RIMpro to time bicarbonate in order to clean up spores ejected
>> typically the day before. Timed properly, you don’t “usually” need multiple
>> sprays. We adjust to risk (RIM value). If conditions dictate an additional
>> spray, then we advise it.
>> We know enough about spore ejection dynamics to spray it “when it hurts”.
>> Granted, Infections that extend for many days can be tricky. But usually,
>> bicarbonate is tank mixed with sulfur so you are getting dual action = some
>> kick back and protection for spores to come.
>> Not sure the picture will be sent via Apple Crop. But I attached one slide I
>> use with growers (from Trapman)
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