Dear extension, My name is Linda, I have a very headache problem about my yard. There have a lot hornet fly around my yard. Those hornets always dig in the hole. I tried some way, like hire people to put chemical, but hornet come back again this year. I bought killer from Home Depot, they still come back. I hope you can help me, thank you very much. Sincerely ,
Howard County Maryland
Please view our website for photos of stinging and other flying insects. It would be a good idea to identify them first. so we can see what you may be dealing with. It is possible you may be referring to mining bees, a beneficial insect. http://extension.umd.edu/hgic/mining-bees-lawns
Look at bumblebees, Europen hornets, and yellow jackets. Send photos if possible.
Thank you for your replying. Here is some pictures, hope can help. Thank you very much.
We had our entomologist look at your photos. We think this is a resin bee. They are not aggressive. They are usually found flying in the landscape for about 2-3 weeks out of the year.