Revista Brasileira de Entomologia Revista Brasileira de Entomologia
Rev Bras Entomol 2017;61:312-7 - Vol. 61 Num.4 DOI: 10.1016/j.rbe.2017.08.001
Medical and Veterinary Entomology
Effects of temephos resistance on life history traits of Aedes albopictus (Skuse) (Diptera: Culicidae), a vector of arboviruses
Junaid Rahim, Abu Hassan Ahmad, , Alhaji Hamisu Maimusa
Universiti Sains Malaysia, School of Biological Sciences, Minden, Malaysia
Received 05 March 2017, Accepted 01 August 2017

The effects of temephos resistance on the fitness cost of the wild populations of Aedes albopictus was evaluated. The larvae of two wild populations were exposed to the diagnostic dose of 0.02mg and 0.012mg/L. The larvae which survived after the 24h exposure to diagnostic dose were considered as resistant and F1 generations were chosen for the comparisons of fitness parameters with the control strain, which includes larval developmental time, adult longevity, fecundity, wing length and hatchability. We found that temephos resistance had negative effects on larval developmental time which was longer for Gelugor strain among the populations with the median range of 10 days and a shorter longevity was observed with the median range of 13 days for males and 16 days for females. Whereas, an effective reduction of 29.8 and 38.6% was observed in fertility and fecundity of Gelugor strain as compared to control strain. In contrast, no clear differences were found in biological parameters of Balik Palau and USM strain, except fecundity and fertility with a reduction of 13.4 and 15.5%, respectively. Whereas, no significant differences were seen in the wing size between the populations with the mean length (mm) of 2.40 for Gelugor, 2.44 for Balik Palau and 2.46 for USM control (p>0.05). Present results indicated that the temephos resistance is associated with the developmental and reproduction potential of resistant population of A. albopictus and the fitness has been compromised.

Temephos, Insecticides resistance, Fitness cost, Aedes albopictus, Dengue
Rev Bras Entomol 2017;61:312-7 - Vol. 61 Num.4 DOI: 10.1016/j.rbe.2017.08.001