Source: Science and Development Network,ENN, Date: February , 2010
Malaria researchers in Benin say
they may have found a replacement for DDT in areas where mosquitoes are
resistant to common insecticides.Indoor residual spraying (IRS) of
insecticides is a major part of malaria control. But worries over toxicity and
environmental persistence have led to calls for DDT to be phased out, and
mosquitoes are growing resistant to widely used pyrethroid insecticides.
Alternatives are expensive and short-lived.Researchers writing in Malaria
Journal this month (8 February) say that a modified version of the insecticide
chlorpyrifos-methyl (CS) could provide a solution.CS is too short-lived to be
feasible or cost-effective for malaria control when applied directly. But coating
tiny droplets of it using a process known as microencapsulation boosts its
effectiveness and longevity.