Planted two giant pumpkins. Were overgrown in pots and one died when it began to run. I thought wind had twisted it too many times. The other was doing fine till this week. Its wilting and yellowing. Cut a petiole and tried to squeeze bacterial ooze but got none. The previous crop was cantaloupes. Am thinking fusarium crown rot. Is it possible to id from plant sample? Send to hgic or um diagnostic lab? Soil needed?
Pumpkins can wilt for multiple reasons, we think that your main problem is that they were overgrown and in pots. Pumpkins (and all cucurbits) are harder to transplant than other crops and there was likely root damage.
Other than that, wilting and yellowing could suggest problems with watering, or bacterial wilt from cucumber beetles which you say you checked for.
Bacterial rots like are highly unlikely and we wouldn't bother to test for them.
Take a look at our Pumpkin page here with more information: https://extension.umd.edu/hgic/topics/pumpkin
The good news is there is still time to direct seed pumpkins into your garden with good results, but do it soon.