Humans have tried everything from insecticides to flame-throwers to deal with locust swarms, with mixed results. New research may offer new angles of attack
of the world, covid-19 is not the only plague that 2020 has brought. In parts of Asia and east Africa, swarms of locusts have stripped fields. Thereckons the swarms in India and Pakistan are the largest for a quarter of a century, and that the numbers in Kenya are the highest for 70 years. One swarm in northern Kenya was estimated to be 25 miles long and 37 miles wide.
Dr Guo and her colleagues collected 35 chemicals collected from the bodies and faeces of the migratory locust, the most widespread species. Six of those showed significantly higher production among gregarious locusts than among solitary ones. When tested, gregarious locusts were strongly attracted to just one, a chemical called 4-vinylanisole . That attraction was strong for immature and mature locusts alike, and for both males and females.
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