LEO1 and malaria: The behavioural correlates of kdr mutations in Ae. aegypti in relation to mating competitiveness have been poorly documented [5,22] with the exception of the point mutation conferring dieldrin resistance (‘resistance to dieldrin’ or rdl) [17,19] and the L1014F kdr mutation [17] that have both been associated with reduced male mating competitiveness in the malaria vector Anopheles gambiae.