Adult squash bugs are large, gray to brown garden insects.
Adults overwinter in plant debris around the garden, under rocks, etc. When the adults emerge, late May to early June, they fly to growing cucurbit plants to feed and mate.
The females lay eggs on the underside of the leaf or along the stem. Eggs hatch in about 10 days. Nymphs go through five stages to reach maturity; this takes 4 to 6 weeks. It is not uncommon to see multiple stages at one time.
They are very mobile and move and down stems and from plant to plant. You can use this to increase the effectiveness of insecticides. They also spend most of their life on the underside of the leaves.
When controlling all of these insects, you need to start applying when you see the first blossom and treat from where the stems come out of the ground, down the stem to where the blossoms are, late in the season you need to go beyond that.
Hi-Yield Multi-Use Dust is the absolute BEST and most effective Squash Bug Control on the market. What makes it so good it the fact that it is nearly waterproof. This dust gets into the little irregularities in the stems and leaves and stays for up to 3 weeks, even though rain and watering’s. repeat every 3 weeks throughout the season.
The liquids, ferti-lome Broad Spectrum Insecticide and HY Lawn, Garden, Pet and Livestock are only effective on the nymphs and applications should be repeated as needed. Some results can be seen on adults with the addition of Spreader Sticker.