One bird repellent that has worked for a wide range of orchards, vineyards and other open areas. They use powerful aerosol systems to create a food-grade, non-lethal mist of methyl anthranilate. This misted chemical won't harm birds, man or beast, and is FDA-approved. Birds fly through the mist and it makes them want to scatter in all directions and never come back. Some Fog/Mist systems area equipped with remote spray units and come with adjustable spray nozzles to reach specific trouble zones.