Spraying a beehive with an insecticide aerosol kills bees. Spraying a hive with a spray composed of soap and water or spraying it with almond oil are less harsh bee-killing alternatives.
A hive should be sprayed with insecticide aerosol spray in the early morning or late at night and disposed of to prevent pest infestations. A mixture of 1 gallon water and 1 cup dishwashing detergent poured into a hand-held pump sprayer creates an effective bee killer. The soapy water should saturate the bees so that the detergent can penetrate the bodies; then, the water enters the bodies and drowns them. Almond oil, when sprayed into a plugged hive, is an effective natural bee killer.