The area has been sprayed with insecticide since last week and the numbers of deaths and infections have dropped, the statement said.

从上周开始，当地开始喷洒杀虫剂，目前病死率和感染率都已下降。

youdao

The Israeli team sprayed acacia trees in an oasis in the southern desert region of the country with a sugar solution containing the insecticide Spinosad.

BBC: The malaria parasite is spread by mosquitoes