V_coerulea said:

Vine borers usually get the vine not the leaves. So the borer may still be a
problem. Sometimes the hole and frass are on the underside of the vine and
hard to see.

The moth lays eggs on the stem and on the larger leaves, especially in
bush-type squashes. From the leaves they can rather quickly move into
the stems without showing a lot of frass--it goes into the hollow leaf stem.

The moths fly in the middle of the day and mimic wasps in the way they
fly. (Not that we have any red and black wasps, locally, so it's easy to
see through the ruse.)
--
Pat in Plymouth MI ('someplace.net' is comcast)

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)