South China citrus orchards have used weaver ants for pest control since ancient times.
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history
Southern Chinese citrus growers have used 黄猄蚁 as a biocontrol agent for over 1,700 years. The practice is documented in Ji Han's 嵇含南方草木状 (c. 304 CE), making it one of the earliest recorded examples of biological pest control anywhere in the world.
