We have a concrete slab/scrap grill in the middle of the garden. A fire was made here with dried grass and sticks gathered from dead tree limbs.
The alcohol caught on fire to burn the bugs from above and below. The fire stayed hot by constantly being fed more kindling. The smoke caused a large amount of the insects to fly away.
The char remains were crushed into ashes. These ashes were spread on all the beds throughout the garden. During the peppering of the ashes I didn’t notice the presence of any cucumber beetles. Later in the evening the beetles were back seemingly unaffected by the preparation. Further research is needed for a more affective method of nontoxic insect controls.