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Table 2 Resistance status of wild Anopheles arabiensis to pyrethroid and organophosphate insecticides

From: Long-lasting control of Anopheles arabiensis by a single spray application of micro-encapsulated pirimiphos-methyl (Actellic® 300 CS)

Insecticide Dosage (%) Number tested Mortality (%)
P-methyl 0.025 40 98
P-methyl 0.05 40 100
P-methyl 0.25 40 100
Malathion 5 201 100
Permethrin 0.75 111 90
  1. Two- to five-day old sugar-fed offspring (F1) of Anopheles arabiensis collected from cattle-sheds in Lower Moshi were exposed for one hour in WHO cylinders lined with papers treated with diagnostic dosages of malathion and permethrin, and a range of dosages of p-methyl.