You have created warm moistness and they will find it. Bait them inside the frame and reduce populations later. I have found I can seed or transplant thru one inch holes in black plastic and gain both soil heat and water retention. In most cases I form the soil into a shallow trench so rain will water for me. You can also use a tunnel or frame over it for more early heat.
Cucumbers grow especially well in black plastic.
Water penetrates carpeting, lay it as flat as possible. One inch holes suffice for seeds or transplants because heating and moisture circulation are very good. Use your imagination and materials at hand. Those who plant in old rubber tires have another tool now. Pull off the handle grip and shove the rod into the soil.