Do natural techniques count?
Western honey bees have no innate protection against hornets that can quickly destroy their colonies.
And the Japanese honeybee (Apis cerana japonica) has an effective strategy. When a scout hornet detects and approaches a Japanese honeybee hive, it emits specific pheromonal hunting signals. When Japanese honey bees detect these pheromones, about 100 individuals gather at the nest entrance and set a trap, keeping the entrance open. This allows the hornet to enter the hive. When the hornet enters the hive, a crowd of hundreds of bees surround it, completely covering it and making it impossible to respond effectively. Bees vibrate violently with their flying muscles, just as they do to heat a hive in cold conditions. This raises the temperature in the ball to a critical temperature of 46 °C. In addition, the efforts of bees increase the level of carbon dioxide (CO2) in the ball. At this concentration of CO2, they can withstand temperatures of up to 50 °C, but the hornet cannot survive the combination of high temperature and high carbon dioxide levels. Some honey bees do die with the intruder, as they do when they attack other intruders with their stings, but by killing the scout hornet, they prevent him from calling in reinforcements that would destroy the entire colony.