Report Grain Mites ? What do they look like and how to get rid of them? in Health Issues Posted October 12, 2018 Well, it looks like springtime. As it is harmless to people and animals, but they can cause problems in large numbers of plants. If you want to eliminate them, then you can use a household aerosol spray. But, most of the Nassau County exterminator says that treatments by yourself, however, are a short term solution. So, it is best that you can hire a pest professional who will apply treatments and application whenever it is necessary.