Evaluation of chlorphoxim used against Anopheles albimanus on the south coast of Mexico: 2. Use of two curtain-trap techniques in a village-scale evaluation trial.

Mexico’s malaria campaign, initiated in 1955, has had considerable success in many malarious parts of the country. The initial technique used, like that employed in most other Central and South American countries, involved applying DDT at a dosage of two grams per square meter to the indoor walls, interior roofs, and exterior eaves of houses. It was subsequently reported, on the basis of four years’ spraying, that malaria transmission had been interrupted in 77% of the country’s malarious areas (1). At about the same time, however, it was suggested that the main reason for persistence of transmission in other parts of Mexico was the behavior of two vectors, Anopheles albimanus and An. pseudopun&pen&, relative to DDT (2). In this