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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
</pre>
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