these are squash bug nymphs (babies) and there are terrible for your plants. The adult squash bug is flat-backed, brownish black, and measures about 0.62 inch long. Older nymphs are grayish white with black legs and antennae. Nymphs range from 0.19 to 0.5 inch long. Squash bugs feed primarily on squash and pumpkin. Adults and nymphs suck plant sap from the leaves and stems, causing wilting and death. Nymphs go through five molts before becoming adults in 4 to 6 weeks. There is only one generation per year.

• Early detection of nymphs is important, as adult squash bugs are difficult to kill.

• Remove and kill nymphs and adults by dropping them into a pail of soapy water. This is effective only if a few plants are affected.
• Removal of squash bugs can be challenging because squash bugs hide under leaves and move quickly when disturbed.
• Crush eggs that are attached to the undersides and stems of leaves.
• Trap squash bugs by laying out boards or pieces of newspaper. Squash bugs will group under the boards at night, you can then collect and destroy them in the morning.
• Remove plant debris during the growing season, to reduce sites where squash bugs can hide.
• Clean up cucurbits and other plant matter in the fall to reduce the number of overwintering sites.

Organic pesticides|
azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use.
kaolin-Applied as a spray to foliage, it acts as a repellent to some insect pests. Some formulations are OMRI-listed for organic use.
pyrethrins-Some formulations are OMRI-listed for organic use.
Please read and follow all directions on these materials. The oil in particular can burn the plant.