[LivvyW]

When and how?

[mumofstig]

are the cukes indoor or outdoor types?

You can stop pumpkins after 3 fruits have set, or leave them be...I choose the lazy option

[sunshineband]

I chop off pumpkin shoots that are in the way ie trailing across the path, so I don't fall over them.

Interestingly, shoots that run over soil grow roots from leaf joints, which boost the plant, so don't stop them too soon 

[Trillium]

I do the same as mum - after 3 squash have set on each vine, I nip off the growing tip so the squash can develop more fully.  I never do this with courgettes though, just let them keep going.

And I never pinch off cukes unless they vine so much that they become a problem. The last few years I've trained them up one side of my munty frame and they're quite happy up there. My neighbor is very happy to take any extra cukes.

[LivvyW]

The cucs are an outdoor variety that i am growing indoors! No removing of male flowers recommended if that makes a difference.

I have 4 pumpkin plants and read somewhere to pinch out the growing tip after 4 leaves have formed, then let 2 fruit set on each side shoot that will form.

[Trillium]

Pumpkins are a bit different in that they set much larger fruit, so 2 would be better than 3 for squash. For the big Atlantic pumpkins, one is all the plant can handle.

I never bother removing the male flowers as they do nothing other than offer pollen, sometimes.  Life is already too busy to worry about picking them off.