IUBio Biosequences .. Software .. Molbio soft .. Network News .. FTP

Question: Conifers and seasonal chloroses??

Mike the Tree Doctor mlamana at bestweb.net
Sat Nov 13 10:36:54 EST 1999


Thanks for the response. However, the situation is occurring on the extant
needles that will overwinter into 2000.

Mike the Tree Doctor

<kbonnici at ivory.trentu.ca> wrote in message
news:FL37vp.L38.A.ebony at news.trentu.ca...
> I would assume that its ordinary seasonal leaf drop. However, you say its
> happening to all individiauls in a species, so that seems puzzling--unless
> within species needles are dropped not every season, but every other, or
> third season. Chlorosis is certainly not seasonal, and you likely would
> discovered that with your nutrient assays and pH testing.
> HTH,
> Kellie
> In article <nGKW3.4525$7m.262305 at newshog.newsread.com>, "Mike the Tree
Doctor" <mlamana at bestweb.net> writes:
> >Folks:
> >
> >I have to pose a general question to any with experience in the matter of
> >seasonal chloroses in conifers - principally hard pines.
> >
> >I have a situation in southern New England (Zone 4) where for multiple
> >now I have observed gradual yellowing of pitch pines (Pinus rigida),
> >mtn. pine (Pinus pungens), and to a lesser degree 'Waxman' eastern white
> >pines as each winter approached.
> >
> >The trees in question are from multiple provenances, in multiple soils,
> >obtained in multiple years. Not each individual of a species for lot is
> >affected. I have done the usual battery of soil and paired soil/foliage
> >nutrient assays - all are inconclusive. Soil pH, iron, manganese, copper,
> >Ca:Mg ratios are all in the ball park, but micronutrient concentrations
> >foliage are off in some tests. All trees have been treated with NPK,
> >sea-kelp extracts, humates, etc. at various times.
> >
> >Generally speaking, the condition goes away or attenuates greatly with
> >onset of Spring - any ideas or similar experiences.
> >
> >Thanks!
> >--
> >Mike the Tree Doctor
> >www.treedoctors.com
> >
> >

More information about the Plantbio mailing list

Send comments to us at biosci-help [At] net.bio.net