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> >> wrote: >> >> 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 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) >> >> <PastedGraphic-2.tiff> >> >> >> >> _______________________________________________ >> apple-crop mailing list >> apple-crop@virtualorchard.net >> http://virtualorchard.net/mailman/listinfo/apple-crop > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
