Further Seaweed Theories

I read a piece recently by a UK pundit who suggested that spraying
with seaweed solution might also have at least indirect benefits in
relation to rust and blackspot, for which, said he, there are
currently no organic remedies. The theory was that the seaweed spray
might help simply by being a sort of plant vitamin pill - increased
health = increased resistance to disease. (This was supported by a
biologist working for Maxicrop - but, since they make seaweed
solutions, they WOULD say that, wouldn't they...)

Any comments anyone? (a) on the lack of organic remedies for rust and
blackspot, (b) on the proposed benefits of seaweed spray in that
situation.
Tim Longville
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