I've lived in Cottage City, MD for 30 years and have never seen a mushroom. I just cleared my back yard of leaves and they were every where - big ones, little ones, clumps of mushrooms, single mushrooms, on the ground, along the wooden fence, on the tree roots. Everywhere. I also have a puppy that chews on anything that doesn't chew back. Two questions: Any reason for the invasion? and, most important - Is June Bug safe? I've cleaned them all out, but I assume they'll be back. Thanks!
We have had a wet season and it is not uncommon for mushrooms to appear in lawns, etc. The fungus feeds on dead organic matter such as dead tree roots, buried logs, and stumps. Take a look at our website http://extension.umd.edu/hgic/topics/mushrooms-lawns
If you have a puppy that chews on everything, you should walk the dog elsewhere until you knock over the mushrooms and pick up and discard them.
We are not sure of your question on June Bug.
The green June beetle emerges from the ground in the summer not now. Adults may feed on small fruit such as grapes and fruit on fruit trees. Grubs feed on decaying organic matter. No control is necessary. Predators like birds will eat them.
If this is not what you are referring to, send us photos so we can see what you are dealing with.