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Table 4 Susceptibility values (LC50 and LC90 expressed in % of active ingredient) of different African populations of Culicoides imicola to different active ingredients. Mortality was recorded 24 h after 1 h exposure to different concentrations

From: How do species, population and active ingredient influence insecticide susceptibility in Culicoides biting midges (Diptera: Ceratopogonidae) of veterinary importance?

 

Rufisque, Senegal

Pretoria, South Africa

Active ingredient

No. test

LC50 %

LC90 %

No. test

LC50 %

LC90 %

(n)

(95 % CI)

(95 % CI)

(n)

(95 % CI)

(95 % CI)

Deltamethrin

4

0.0005

0.0015

3

0.0003

0.0020

(458)

(0.0004–0.0005)

(0.0012–0.0018)

(291)

NA

NA

Permethrin

3

0.0031

0.0168

   

(521)

(0.0018–0.0045)

(0.0105–0.0431)

   
  1. No test number of tests performed, n  number of individuals tested, CI confidence interval, NA confidence interval not computed; due to a large variability in the dose/response effect