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 being replaced by bicarbonate. And IPM growers are looking into it as well. Vincent > Le 7 avr. 2016 à 15:56, David Kollas <kol...@frontier.com> a écrit : > > > > 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 poor fruit set and lower-sugar > apples are less apparent if those sprays are not repeated, compounding the > damage. How are the Quebec growers avoiding LLS injury, Vincent? > > Concerning Dave Rosenbergers suggestion that burning the leaves sufficiently > to stop growth of the fungus might be beneficial, > I have wondered whether captan and oil could be used for that purpose, but I > have never tried it. If no one knows of any such > trial, I may give it a try this year. I would expect to loose the crop, but > hopefully sufficient new foliage would develop to make flower buds for next > year. > > David Kollas > Kollas Orchard; CT > > > On Apr 7, 2016, at 2:17 PM, David Doud <david_d...@me.com> wrote: > >> 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 foliage dwarfing, injury, loss of foliage, reduction >> in rate of photosynthesis, and fruit russeting of apples…Young tender tissue >> contains abundant oxygen, and these polysulfides immediately satisfy >> themselves by taking the oxygen supply from the leaf tissue. As a result, >> normal leaf functions are temporarily disrupted and desiccation of marginal >> cells, or "burning” takes place. The leaves take on a “crinkled” appearance >> and rarely develop normally. This reaction also offers an explanation for >> sulfur russeting during the pre-pink, pink, and petal fall stage of fruit >> formation…” >> >> there is varietal variation in regard to susceptibility to LLS injury - >> >> In your situation, I would be very conservative using LLS until the foliage >> has a chance to dry and harden - at least one good sunny day of well above >> freezing temps and no more freezing temperatures forecast - but whadda I >> know? >> >> I’m in about the same situation as you - sitting here at 1/2” green, a >> couple of long wetting periods and 3”+ of rain at mostly cold temps but >> enough 50*+ hours to cause concern - two nights, one 24*, one 23* earlier >> this week and two more forecast for saturday morning and sunday morning - >> the orchard is soaked and soggy and there is still pruning brush in the way >> some places - not to mention high winds for the last 4 days - and 30mph >> gusts today - >> >> I’m not going to worry too much - after we get out of this weather pattern >> and I can get thru the plantings I’ll get a protectant on and scout >> carefully after symptoms have time to develop - I’ve conserved chemicals >> like Syllit, Topsin-M, Rally, and the like and feel like if I need to I can >> knock out an infection if one develops - >> >> Dad used to talk about the year they got scab started at green tip and the >> frustrating season long fight afterwards - it was before I was born and I >> don’t recall specifically which year he mentioned, but it was a big deal - I >> think we have some better options today to deal with that situation - at >> least I hope so - >> >> Good luck - >> David >> >> >>> On Apr 7, 2016, at 12:56 PM, David Kollas <kol...@frontier.com> wrote: >>> >>> >>> Does anyone have enough experience with liquid lime sulfur to comment >>> on it as an emergency >>> choice for application before rains have stopped during the current long >>> infection period? It is listed as >>> having 72-96 hours back-action in the New England Tree Fruits Management >>> Guide. >>> In my particular situation, Half-Inch Green stage tissues were exposed >>> many hours during two of >>> the previous three nights to 18-20 degrees F, and are probably extra >>> sensitive to captan penetration >>> and phytotoxicity. >>> >>> David Kollas >>> Kollas Orchard >>> Connecticut >>> >>> _______________________________________________ >>> apple-crop mailing list >>> email@example.com >>> http://virtualorchard.net/mailman/listinfo/apple-crop >> >> _______________________________________________ >> apple-crop mailing list >> firstname.lastname@example.org >> http://virtualorchard.net/mailman/listinfo/apple-crop > > _______________________________________________ > apple-crop mailing list > email@example.com > http://virtualorchard.net/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list firstname.lastname@example.org http://virtualorchard.net/mailman/listinfo/apple-crop