The susceptibility of five African Anopheles species to Anabaena PCC 7120 expressing Bacillus thuringiensis subsp. israelensis mosquitocidal cry genes

Table 1 Probit analysis of concentration-mortality data for Anabaena PCC 7120#11 against third instar mosquito larvae

Species	LC₅₀(10⁵cells/ml)^*	LC₉₀(10⁵cells/ml)^*	Slope ± SE^†	Heterogeneity^‡
A. aegypti	1.42 (1.12-1.76)^a	8.21 (6.05-12.3)^a	1.70±0.15^a	0.75
An. merus	3.90 (3.58-4.17)^b	9.30 (8.0-11.4)^a	3.37±0.31^b	0.62
An. arabiensis	8.10 (7.62-8.56)^c	14.3 (12.8-16.5)^b	5.18±0.46^c	0.19
An. gambiae	12.3 (11.4-13.3)^d	35.1 (29.5-44.9)^c	2.81±0.24^d	0.49
An. quadriannulatus	15.7 (14.3-17.3)^e	43.0 (35.9-54.9)^c	2.93±0.26^bd	0.92
An. funestus	N.D.^§	N.D.	N.D.	N.D.

* Values in brackets show the 95% fiducial limits (FLs). Values in a column followed by the same letters are not significantly different (overlapping 95% FLs).
^† Slope ± standard error. Values followed by the same letters are not significantly different (p > 0.05).
^‡ Heterogeneity factor = χ² / d.f. (degrees of freedom).
^§ Not determined. Less than 50% mortality was obtained even at concentrations as high as 3.2 × 10⁷ cells/ml.

ISSN: 1756-3305