The use of Aedes aegypti larvae attractants to enhance the effectiveness of larvicides

. P. GONZÁLEZ AUDINO; PAULA V. GONZALEZ; H MASUH; L. HARBURGUER

Foz do Iguazu

Congreso; International Chemical Ecology Conference; 2016

Universidad Federal do Parana

Aedesaegypti (L.) is animportant dengue, chikungunya and yellow fever vector. Immature stages of thisspecie inhabit human-made containers placed in residential landscapes and the application of larvicides inside containers thatcannot be eliminated is still considered a priority in control programs. Larvicide efficicacy is influenced by several factors, including the formulation used, the waterquality and the susceptibility of larvae, among others.If an attractant canbe incorporated into a slow releaselarvicide formulation it will be feasible to direct the larvae into the sourceof insecticide and thereby improving its efficacy.We study the influence of 1-octen-3oland 3-methylphenol on the rate of Ae.aegypti larvae mortality using the larvicides Bacillus thuringiensis var. israelensis (Bti),temephos and spinosad. These chemicals were combined with the larvicides mixedwith agar during the bioassays. Mortality was registered every 10 min and alethal time 50 (LT50) was calculated. The inclusion of the Ae. aegypti larvae attractantswith the larvicides into a solid agar matrix improved their efficiency obtaining a strong and markedreduction in the LT50 compared with the useof larvicides alone.