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<pre>For what it is worth I have only ever treated scale with a miscible
vegetable oil and no added surfactant and just plain cold water. Control of
scale on our 20 year old trees was achieved after two applications during
Spring about 3 weeks apart. On another grove of 60 x 50 year old trees the
same treatment was applied to severely affected trees at similar rates but
over two years. All but one recalcitrant tree is now scale free. The 400 x
35 year old trees at another grove were treated in a similar fashion. These
trees had not been tended over their lifetime and scale was a significant
problems. After three years the scale is under control.

Regards
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<pre>Sorry to be so dumb, but what is miscible vegetable oil please?
----- Original Message -----
From: P Caird <caird@hitech.net.au>
To: <OliveOil@egroups.com>
Sent: Thursday, July 13, 2000 8:45 PM
Subject: [OliveOil] Scale treatment


> For what it is worth I have only ever treated scale with a miscible
> vegetable oil and no added surfactant and just plain cold water. Control
of
> scale on our 20 year old trees was achieved after two applications during
> Spring about 3 weeks apart. On another grove of 60 x 50 year old trees
the
> same treatment was applied to severely affected trees at similar rates but
> over two years. All but one recalcitrant tree is now scale free. The 400
x
> 35 year old trees at another grove were treated in a similar fashion.
These
> trees had not been tended over their lifetime and scale was a significant
> problems. After three years the scale is under control.
>
> Regards
>
>
>
>
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</pre>
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<pre>Jeff

what is miscible vegetable oil please?

Miscible meaning able to be mixed with water. Plenty available at various
ag outlets.

Regards
</pre>
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<pre>Miscible means mixable ie olive oil can be mixed with canola oil

Vegetable oil = oilslike palm oil, coconut oil, peanut oil, olive oil
but not rose oil or eucalyptus oil.


When sprayaing for scale a vegeteble oil is mixed with water (note if
allowed to stand the oil floats on top. An emulsion can be made by
adding an emulsifying agent or detergent. I can only surmise this idea
is behind miscible oil. That is it forms an emulsion and so can be more
easily sprayed.


Commercial white oil when added to water gives such a cloudy emulsion.
However the commercial preparations contain liquid paraffin but there is
no refernce on the label regarding an emulsifying agent. But there must
be one present.

Prof Stan Kailis
UWA
</pre>
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