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Old 01-07-2003, 12:20 AM
Jim W
 
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Default Black Spot and Sodium Bicarbonate ???

Rod wrote:


"Jim W" wrote in message Only a
search for DIPLOCARPON ROSAE Sodium Bicorbonate on the web brought up
plenty for me.. Although some were *also* refs to the powdery mildew.
The other thing to do is to use the Chemical symbol formula so you'd
search for: DIPLOCARPON ROSAE NaHCO3 Although in this case google
found that too specific (only 4 hits!) The trick with blackspot seems
to be addition of an oil and or potassium bicarbonate. Neem oil is also
mentioned. The basis of most of these bicarbonate controls is that they
upset the pH balance enough to prevent the pest functioning.

Incidentally the mildew experiment is one I repeated at University.. My
results were inconclusive!-))
http://www.herts.ac.uk/natsci/Env/Fu...spot/home.html Most
interesting although out of date (2 years).. It only compounds my
feelings as an organic supporter NEVER to purchase cut flowers again!-)
Useful stuff sodium bicarb


Hmm.............looks like something individuals could usefully pursue
without research funding - just so long as you don't tell anybody you're
using Bicarb for an off label purpose ;~)) It's difficult to imagine
getting worse control than is currently available with the current
domestic fungicides.


You're right but I think you'll find that the agropharm industries have
already done much research.
//
J