If you read the label on your container of Sevin, you'll learn that it is highly toxic to bees, along with any other beneficial insect that may be in the vicinity of your garden. It's actually considered one of THE most toxic products you can use, in terms of bees. It is also deadly to earthworms.

Carbaryl, the active ingredient in Sevin, is a mammalian cholinesterase inhibitor, which everyone should take very seriously.

Oh I didn't know that! Do you recommend any other things to keep bugs away?

Sevin, Carbaryl, is one of the most toxic poisons around. It does kill every insect in your garden, good, bad, or indifferent as well as having adverse health affects on humans.
Just how to control the squash pests involves several steps starting with Floating Row Covers and planting those plants, often "weeds", that attract the predators of the squash pests. If sprays or dusts are needed for control start with the least toxic, not the most toxic, product available and use even that with care since even these low toxicity products are broad spectrum and will also kill off the beneficial insects.
The link below provides a comprehensive look at methods of control.

Here is a link that might be useful: Control of squash pests