It is actually a diurnal moth - a squash vine borer. And it is definitely targeting your cukes!! Although cucumbers are not quite as appealing to it as other cucurbit plants, like summer and winter squashes and pumpkins. But I wouldn't leave anything to chance and get after it now. Read up on this pest HERE.

Yes, squash vine borer. Check all your cucurbit vines for eggs. Pick the eggs off, and then spray BT on the vines just in case you missed any, being sure to drench around the base where the plant comes out of the soil. Once the larva bores inside the vines, external treatments will no longer work. Do this regularly until the squash vine borer season is over. In NYC, you should only get one generation of the moths. Keep an eye out for swollen areas on your vines with nearby holes with sawdusty looking frass coming out. That means a borer has managed to dig in, and you'll have to do some surgery to save your vine.

While most of the eggs will be laid at the base near or at the soil line, I find SVB eggs all over my squash plants, even on leaf stalks. It's a real pain to keep squash alive because of them, so I make sure that any squash I grow is so delicious that it's worth the trouble.

Thanks. I have read about SVB and never seen a picture of them. They look so nice it's a shame they are a 'bad' bug. I will check the stem. This one did not stay long and flew from one to the next very quickly on my cucumbers.

I am starting to grow butternut squash, if iI can manage to get any seeds to germinate this year. My sweet dumpling squash have just started to grow their first true leaves.

Now I am wondering if the SVB is what damages my butternut every year. https://www.houzz.com/discussions/4075537/butternut-squash-dries-up-closer-to-roots

That looks more consistent with squash bug feeding damage. Did it start with leaves turning yellow and getting brown patches and then wilting and dying? Squash bugs inject a toxin into plants as they feed that causes symptoms that look similar to bacterial wilt. Heavy infestations can kill entire vines, but it's also common to see sections of vine die off as in your photos.

I don't remember how it happened last year.

Are these SVB eggs or aphid eggs? There were so many I cut off the leaf to get rid of them. Later today iI need to do a better closer inspection for any type of eggs on my cucumbers.

The second picture I found a dark egg. It looked like it was split in half. Idk if I did it when I picked it off.

I went back out and checked every leaf and stem. There were a few leafs with clusters of aphid eggs. The first picture is definitely aphids because I kept seeing ants around them. I squashed every single one that I could. There were also a few round brown things that may have been the SVB eggs. I tried removing them and they would just fall on the ground. I wanted to collect one for a picture and to squish them in my palm. After I checked them all I used my hose to spray all sides of them to help remove anything I may have missed. Would DE around the base and a light dusting on the vine help?

Those aren't eggs. They're actual aphids. Wash them off with a vigorous stream of water (support the leaf as you do do) or hand-squish them/brush them off gently to avoid injuring the foliage. If you have a healthy population of beneficial predators, you don't have to get all of them--just knock them back enough for the predators to take over control. If not, then you might consider something like insecticidal soap, horticultural oil, or neem.

As for the second photo, I'm not sure what that is, but it doesn't seem to be anything to worry about. Most pests of cucurbits lay eggs in bunches, not singly like that, if it even is an egg.

I saw a spotted cucumber beetle on my eggplant today. I wasn't sure what it was so I left it alone. Now I wish I had killed it.

One of my cucumbers look damaged. Could it be from the beetle or is it a chemical damage? Which would surprise me because I put a lot less than recommended by daconil on them.

That looks fungal to me. Possibly the early stages of cucurbit downy mildew.

Thanks. I will have to take a closer look later today.

https://content.ces.ncsu.edu/cucurbit-downy-mildew

I have 10 cucumbers in the row. I may just pull this one and plant a new seed

I took it out this morning. Some of the other cucumbers have signs of the same thing. I sprayed them all with Daconil till all the leaves were dripping.

These are more pictures of the one I pulled