From The Organic Gardener's Handbook of Natural Insect and Disease Control (1992):
"Remove and destroy crop residues where adults overwinter; rotate garden crops with cover crops such as alfalfa; cover seedlings or plants with floating row cover, hand-pollinating covered squash family plants; apply parasitic nematodes to soil weekly to control larvae..."
Maybe one or more of these methods will be of use. My yard, even though it's in Sunset Zone 17, is too cool to grow cucumbers...so I have no personal recommendations to add.
Sunset Zone 17, USDA Zone 9