Sevin and pruning

Hello list.  Sorry to here about all the weather damage recently.  Ive been lucky here in OH. 
 
Can someone assist with explaining how to prune the vines if I should be pruning. 
 
And I also wanted to know if anyone has had good insect control using garden dust like Sevin and Bug b gone.
 
Had a male open for the first time yesterday, but my females didnt open do I just wait for both a new male and the female to open the same day?
 
Thanks
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