Messina Wildlife's Deer Stopper Quart Concentrate refill is an effective, pleasant smelling, liquid deer repellent for use on all flowers, shrubs, forest and fruit trees to prevent browsing and rubbing damage from deer, moose and elk. The Organic Materials Review Institute (OMRI) lists Deer Stopper for use by organic growers and may be used on fruits and vegetables. Deer Stopper is applied approximately every 30 days, regardless of weather and watering. Deer Stopper dries clear and odor free in about 20 minutes and will not wash off after a heavy rain. 100% Satisfaction Guaranteed. Works by smell and taste and will not wash off after a heavy rain. Lasts for approximately 30 days. Great for axis, moose, elk blacktail, mule, whitetail and other deer damage. Endorsed by the National Home Gardening Club.