Bioassay and molecular monitoring of insecticide resistance status in Aedes albopictus populations from Greece, to support evidence-based vector control

Table 2 WHO bioassay mortalities for Ae. albopictus populations tested against Bti

Bti	Population	n	LC₅₀ (95% CI)		LC₉₅ (95% CI)		Slope ± SE	χ²	df
Bti	Population	n	mg/l	ITU/ml	mg/l	ITU/ml	Slope ± SE	χ²	df
1200 ITU/mg	Patras	250	0.130 (0.080–0.171)	0.156 (0.096–0.205)	0.356 (0.250–0.994)	0.427 (0.300–1.193)	3.76 ± 0.45	113.3	23
	A. Stefanos- ATT	301	0.195 (0.156–0.235)	0.234 (0.187–0.282)	0.465 (0.360–0.736)	0.547 (0.432–0.883)	4.39 ± 0.41	88.59	28
	Heraklion	243	0.145 (0.113–0.179)	0.174 (0.136–0.215)	0.383 (0.276–0.874)	0.459 (0.331–1.049)	3.90 ± 0.49	75.46	23
7000 ITU/mg	Susceptible laboratory strains
	Li et al. [39]		0.036 (0.028–0.047)	0.252 (0.196–0.329)
	Su et al. [40]		0.044 (0.040–0.050)	0.308 (0.280–0.350)

Abbreviations: ATT, Attica region; n, total number of larvae tested to a range of insecticide concentrations; LC₅₀, lethal concentration (mg/l) that kills 50% of the population; LC₉₀, lethal concentration (mg/l) that kills 95% of the population, CI, confidence intervals; ITU, international toxic units; χ², Chi-square testing linearity of dose-mortality response with degrees of freedom (df); df, degrees of freedom
Notes: Log-dose probit-mortality data for larvicides tested against Ae. albopictus larvae. The results are compared to the susceptible laboratory Ae. albopictus control strains of other studies [39, 40]

ISSN: 1756-3305