I have a little fruit fly issue in my worm farm. Is there a way to kill the fruit flies without doing harm to the worms?
If you have flies then you probably don't have enough soil on top of the scraps your feeding the worms. All matter should be at least 2" below the soil. You also want to make sure it's covered. You can spray a light mist of fly spray over the top of the soil and a heavy spray on the outside, but try and not spray the worms directly. Since worms will almost always be under the soil it shouldn't affect them much. You can also place those yellow fly traps around the farm to get rid of any flies that may be attracked to the matter in the farm.