Bayer has a history of involvement in vector control and vector-borne diseases spanning more than 60 years.

From the first discoveries of chloroquine Resochin in 1934 to the development of carbamate and pyrethroid insecticides to partnerships with institutions like the Innovative Vector Control Consortium, Bayer has actively contributed throughout history to the fight against vector-borne diseases.

Timeline: Key Activities and Contributions to Vector-Borne Disease Management

1960s and early 1970s

Developed and introduced carbamate insecticides as important alternatives to DDT during malaria control campaigns during this time. One of these alternatives, bendiocarb is still an important tool for controlling insecticide-resistant malaria vectors today.

Early to mid-1980s

Developed and introduced some of the first pyrethroid insecticides (eg. cyfluthrin and deltamethrin) which would later become critical for use on insecticide-treated mosquito nets.

Late 1990s

  • Developed dedicated formulations suitable for treating mosquito nets (K-Othrine SC and later K-O Tab)
  • Developed specialised water-based formulations of pyrethroids for space-spray application based on FFAST Technology (Aqua K-Othrine and Aqua Reslin Super), reducing dependency on hydrocarbon based diluents.

Early 2000s

  • Developed new formulations for indoor residual spraying, based on deltamethrin (K-Othrine WG)
  • Invested into regulatory defence of bendiocarb to maintain its availability for IRS against malaria vectors; worked in partnership with mosquito net manufacturers to help with technology development to treat fabrics with Bayer's deltamethrin.


  • WHOPES recommendations for the Aqua family of space spray insecticides, K-O Tab 1-2-3 (a longer lasting, in-field mosquito net treatment)
  • Established agreements with IVCC for development of new insecticides for Public Health and new, more cost-effective formulations of existing compounds
  • Achieved WHOPES recommendation for a new, polymer-enhanced formulation of deltamethrin (K-Othrine PolyZone) borne from the collaboration with IVCC
  • Invested into production facilities in Africa for manufacture of Ficam and K-Othrine WG for local IRS programs
  • Between 2006 and 2015, increased investment into product development for vector control by nearly 5 times
  • In late 2015, submitted the first two-way insecticide mixture for IRS for WHOPES evaluation.