Whilst doing my morning perambulation through the greenhouse I
note a sudden
attack of what appear to be black aphids on a large-ish Ulmus
p. corticosa.

Does anyone know of negative reactions of Ulmus when Sevin is
applied? I
also have Orthene and Malathion immediately on hand...

Those all are kind of an overkill, David.

Put the tree outside and give the leaves a HARD spray with water
and that should take care of it. It oughta be warm enough for
elms now in VA. As soon as you're outside the bug problems
should abate.

But to answer your question, Sevin AFIK won't hurt an elm. What
does the label say?

Jim Lewis - - Tallahassee, FL - Blessed
statistics: A Demonstration -- Welcome to Hooterville!
Population: 2000. Elevation: 3000. Established: 1850. TOTAL =
6850

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