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Background  Current tools and strategies are not sufficient to reliably address threats and outbreaks of arboviruses including Zika, dengue, chikungunya, and yellow fever. Hence there is a growing public health challenge to identify the best new control tools to use against the vector  Aedes aegypti . In this study, we investigated  Ae .  aegypti  sugar feeding strategies in Bamako, Mali, to determine if this species can be controlled effectively using attractive toxic sugar baits (ATSB).    Methodology  We determined the relative attraction of  Ae .  aegypti  males and females to a variety of sugar sources including flowers, fruits, seedpods, and honeydew in the laboratory and using plant-baited traps in the field. Next, we observed the rhythm of blood feeding versus sugar feeding activity of  Ae .  aegypti  in vegetation and in open areas. Finally, we studied the effectiveness of spraying vegetation with ATSB on  Ae .  aegypti  in sugar rich (lush vegetation) and in sugar poor (sparse vegetation) urban environments.    Principal findings  Male and female laboratory sugar feeding rates within 24 h, on 8 of 16 plants offered were over 80%. The survival rates of mosquitoes on several plant sources were nearly as long as that of controls maintained on sucrose solution. In the field, females were highly attracted to 11 of 20 sugar sources, and 8 of these were attractive to males. Peak periods of host attraction for blood-feeding and sugar feeding in open areas were nearly identical and occurred shortly after sunrise and around sunset. In shaded areas, the first sugar-seeking peak occurred between 11:30 and 12:30 while the second was from 16:30 to 17:30. In a 50-day field trial, ATSB significantly reduced mean numbers of landing / biting female  Ae .  aegypti  in the two types of vegetation. At sugar poor sites, the mean pre-treatment catch of 20.51 females on day 14 was reduced 70-fold to 0.29 on day 50. At sugar rich sites, the mean pre-treatment catch of 32.46 females on day 14 was reduced 10-fold to a mean of 3.20 females on day 50.    Conclusions  This is the first study to show how the vector  Ae .  aegypti  depends on environmental resources of sugar for feeding and survival. The demonstration that  Ae .  aegypti  populations rapidly collapsed after ATSB treatment, in both sugar rich and sugar poor environments, is strong evidence that  Ae .  aegypti  is sugar-feeding frequently. Indeed, this study clearly demonstrates that  Ae .  aegypti  mosquitoes depend on natural sugar resources, and a promising new method for vector control, ATSB, can be highly effective in the fight against  Aedes -transmitted diseases.

Frequent sugar feeding behavior by Aedes aegypti in Bamako, Mali makes them ideal candidates for control with attractive toxic sugar baits (ATSB)