"Does anyone have a diy trap thag works or can recommend something?"

Anney, a member that used to post here, had traps. Several of them. I've never used them so I can't say anything about them. There is lots of information regarding cucumber beetles within the posts as well.

Cucumber Beetle trap experiment

Cucumber Beetle Bait Traps - Pics

My latest cucumber beetle traps

Controlling Cucumber Beetles

"What's the best way to keep them under control?"

Kill them by any means necessary. If you find one, squish it, knock it into some soapy water, spray it with something, anything. Do not let it live.

Rodney

This way isn't organic but works pretty well: In the evening spray a littlle bit of Sevin on top of some of the leaves...not on blossoms or on bees, understand. Cuke beetles, ants, and bees are interested in the blossoms once they start in....yet the beetles land on top of those leaves too. I think that this is a practical method. Purists will not agree.

Does anyone know from experience if the clove oil/sevin glass bottle traps actually work? Clove oil is expensive and I'd hate to waste it if it won't work. Thanks

In my opinion, beetle traps with lure is not for a small garden. I used them once and had all neighborhood beetles in my yard whole summer long. Without lure yellow sticky pads catch some of the beetles, but much more they catch flies and whole pad is covered in one day. I ended up with planting my cucumbers in permanent tulle cover on trellis(planting only parthenocarpic types ) and other plants (zucchinis , melons ) are all covered while small, until they start flowering. I noticed, the beetles do not harm older squash that much as cucumbers, just because squashes are less prone to the wilt then cucumbers. I don't know about pumpkins(don't grow them). If plants are still very small I think you still should cover them. The beetles are not that fast moving in very early morning hours(right after dawn) , so you can pick them all and make a cover right after that. Shaking them off in the soapy water or using portable hand held vacuum works the best, Smashing disturbs the plants as well. Continue to check under cover if you miss any. Tulle is a good cover for it - you can see through very well. Good luck!