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Table 3 Estimated time (months) for mortality to decrease to 80 and 50% for Anopheles arabiensis , Culex quinquefasciatus TPRI and Muheza strains tested on laboratory sprayed substrates

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

Substrate   Insecticide Estimated time to 80% mortality Estimated time to 50% mortality
Time (months) 95% CI Time (months) 95% CI
Anopheles arabiensis dondotha
Mud P-methyl EC 1.0 (0.7 to 1.8) 1.9 (1.2 to 4.2)
P-methyl CS B 4.9 (4.4 to 5.5) 7.5 (5.7 to †)
P-methyl CS BM 4.4 (3.8 to 5.1) 6.2 (5.4 to 7.0)
Concrete P-methyl EC 2.3 (1.8 to 2.7) 3.1 (2.7 to 3.3)
P-methyl CS B 6.4 (6.1 to 6.8) 7.2 (6.9 to 7.5)
P-methyl CS BM 5.0 (4.4 to 5.5) 6.5 (6.0 to 7.0)
Culex quinquefasciatus TPRI
Mud P-methyl EC 1.8 (1.4 to 2.2) 2.1 (1.7 to 2.5)
Lambda CS 2.9 (2.7 to 3.3) 3.7 (3.4 to 4.0)
P-methyl CS B 6.2 (5.3 to 7.6)
P-methyl CS BM 7.4 (6.8 to 8.1) 9.7 (8.6 to 11.0)
Concrete P-methyl EC 0.8 (0.7 to 0.9) 1.3 (1.2 to 1.6)
Lambda CS 5.0 (4.7 to 5.3) 5.9 (5.7 to 6.1)
P-methyl CS B 8.2 (7.5 to 9.3) 9.7 (8.9 to 10.7)
P-methyl CS BM 6.8 (0.6 to 7.2) 8.6 (8.1 to 9.1)
Culex quinquefasciatus Muheza
Mud P-methyl EC 0.8 (0.5 to 1.1) 1.3 (1.0 to 1.6)
Lambda CS 0.9 (0.5 to 1.4)
P-methyl CS B 4.0 (3.5 to 4.6) 7.1 (5.5 to 11.0)
P-methyl CS BM 3.8 (3.3 to 4.3) 6.4 (5.7 to 7.3)
Concrete P-methyl EC 1.0 (0.8 to 1.2) 1.4 (1.0 to 1.7)
Lambda CS 1.1 (0.8 to 1.6) 1.8 (1.5 to 2.2)
P-methyl CS B 4.9 (4.2 to 5.6) 6.5 (5.8 to 7.4)
P-methyl CS BM 4.3 (4.1 to 4.6) 5.7 (5.3 to 6.1)
  1. †Indicates that statistical models produced estimates outside the study period: for Culex quinquefasciatus TPRI, estimated mortality for Actellic CS-B on mud was higher than 50% throughout the entire study period; for Culex quinquefasciatus Muheza, estimated mortality for Lambda CS was lower than 80% throughout.