无人机喷洒生物杀虫剂，在非洲乡村掀起抗疟新浪潮
In the swampy lowlands of Mozambique, where malaria is a constant threat, a new kind of aircraft has begun buzzing over rice paddies and thatched homes. These are not military drones or delivery machines—they are tiny, solar-powered planes that release a fine mist of biological insecticide over mosquito breeding sites. The goal is simple: kill the larvae before they become adults and bite people.
The technique itself is as clever as it is gentle on the environment. Instead of spraying large amounts of chemical pesticides from trucks or planes, the drones target only stagnant water where mosquitoes lay eggs. A special gel containing a natural bacterium, *Bacillus thuringiensis israelensis*, is released in precise amounts. This bacterium is harmless to fish, frogs, and humans, but deadly to mosquito larvae. The drone's software maps the area, calculates wind drift, and ensures every possible breeding pool gets a dose.
Vocabsavvy AI · a public-health writer · Vocabsavvy Original