A team tested their idea in nine villages in the arid Bandiagara district of Mali, West Africa.
Removing flowers from a common shrub appeared to kill off lots of the older, adult, female, biting insects that transmit malaria.
Without enough nectar the "granny" mosquitoes starve, experts believe.
Getting rid of the mature females can stop the cycle of malaria transmission.
These Anopheles mosquitoes carry the malaria parasite in their salivary glands and pass it on to people when they bite and draw blood.