"James" wrote in message
oups.com...

TQ wrote:

Possibly bean beetle damage. Sevin or Rotenone will control them. Be
sure
to get the leave/s undersides. If the vines are in flower, try to limit
the
application to the leaves to avoid killing your pollenators.

How would I go able dusting the underside of leaves?

You/d need a mechanical dust applicator with an adjustable nozzle tip for a
large plot. For small plots, you/d have to roll the leaves over by hand.

Applying dust to the tops will get most of the pests, but not all. This
would give you some measure of control and depending on how bad the bugs
are, it may be enough.

A Sevin spray (or wettable powder) would be easier to apply, so that may be
a better solution.