I’d do nothing. The plants are healthy and the holes are superficial.

Doing nothing would be my preferred method, given that I am just heading out to buy netting for our newly acquired but already fruit bearing ( and disappearing...) blueberry shrubs, and then need to spray the geraniums and petunias that are showing aphids.

But...., I now remember seeing several bugs flying off those squash leaves, they had yellow and black stripes on their bodies.

I agree damage seems minimal right now, and plants look very healthy. Perhaps just keep an eye on them and scout for pests, destroying any you find.

Also noticing the edges of damage seem scabbed over, indicating it is old.

FWIW, I sometimes get damage like that from wind, falling leaves or twigs hitting the leaves and tearing them. Animals like birds also can cause such tears.

A brief hail event could cause holes similar to those too, but one or two holes looks like a little chewing going on. Once the squash starts to bloom the cuke beetles will congregate in the flowers.

Have not had any hail - so far, but lots of birds and also rabbits. The rabbits chewed up half of our sunflowers before we put chicken fencing around the rest. The little bugs I see lately crawling and flying around the squashes and sunflowers have yellow and black stripes. Cannot catch them, they quickly fly off...buggers!

And I just noticed another bug, also with some yellow, but different shape, thinner than the other, with bigger wings. I am attaching 2 pictures below, 1st probably the cucumber beetle, have not ID'd the other yet. Another pic. showing some more damage on several leaves.

Would Safer's End All do the trick? Anyone out there with experience with this product ?

Yep that's the dreaded Striped Cuke Beetle alright and probably it's damage too. Hard to sneak up on fer sure. I use a squirt/stream bottle with my preferred pesticide to shoot them at a distance without bombing everything else nearby.

in two sessions we caught over 40 bugs today, some flew away. These bugs were buzzing around my head like mosquitoes. It feels like there was a bug explosion over night. The damage to the leaves is so much worse than it was two days ago. Mostly cucumber beetles, but there were a few others as well, one had a bright yellow body. I wore latex gloves and wound some sticky tape around my right hand, that worked for me. Found no eggs, either we did not see them, or they are all hatched? This evening I sprayed all squashes and sunflowers with insecticidal soap and neem oil in water, using a small hand sprayer. Ordered a garden pump sprayer today, should arrive tomorrow.

Keep in mind as the leaf grows so do the holes. New holes are usually jagged and have edges, old holes are much more rounded. If they leaf increase in size 4x so does the hole!

The damage shown is so small that I wouldn't even pay attention to it. Plants don't have to be perfect. Your plants look completely healthy to me with very, very minor damage.

Laceyvail, agreed, plants dont have to be perfect. But don't forget you are responding to pictures now 10 days old. Bug volume and damage did increase, inspite of spraying, catching them manually, putting out yellow bowls with soapy water which catches several dozens of bugs daily.

Now these beetles are mostly interested in the squash flowers. One flower alone can have 6 to 10 cuce beetles devouring it and mating.

My question is: Do I let the bugs destroy the flowers, remove the flowers together with the bugs, or destroy parts of the flowers by trying to get the bugs out manually or spraying them? To top it off, Japanese beetles joined the cucumber beetles. I am not concerned about looks, but would really like to have some squash at the end.

Any more advice of "ignoring it" or "not paying attention" is not useful.

Would like to hear from people who actually dealt with these problems, and how specifically.