Attractive toxic sugar baits or ATSBs are oral

insecticides Insecticides are substances used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. Insecticides are used in agriculture, medicine, industry and by consumers. Insecticides are claimed to b ...

designed to reduce

malaria Malaria is a mosquito-borne infectious disease that affects humans and other animals. Malaria causes symptoms that typically include fever, tiredness, vomiting, and headaches. In severe cases, it can cause jaundice, seizures, coma, or death. S ...

infections by killing the host vector - the

mosquito Mosquitoes (or mosquitos) are members of a group of almost 3,600 species of small flies within the family Culicidae (from the Latin ''culex'' meaning " gnat"). The word "mosquito" (formed by ''mosca'' and diminutive ''-ito'') is Spanish for "li ...

- rather than the parasite itself. Attractive toxic sugar baits are manufactured from readily available, inexpensive ingredients in

tropical The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to ...

and

sub-tropical The subtropical zones or subtropics are geographical and climate zones to the north and south of the tropics. Geographically part of the temperate zones of both hemispheres, they cover the middle latitudes from to approximately 35° north and ...

areas. They broadly consist of an oral toxic component, a sugar component to encourage feeding on the ATSB, and a scented component attractive to mosquitos or other target vectors. Typical ATSBs consist of

boric acid Boric acid, more specifically orthoboric acid, is a compound of boron, oxygen, and hydrogen with formula . It may also be called hydrogen borate or boracic acid. It is usually encountered as colorless crystals or a white powder, that dissolves ...

as the oral toxin, unrefined cane sugar as the sugar source, and fruit, flowers, seeds and other scented material taken from local plants known to be popular feeding sources for mosquitos. Mosquitoes require sugar as their main source of energy. By mimicking the scent of sugar-providing plants that are naturally attractive to mosquitoes, it is possible to attract the mosquitoes to insecticide-laden traps. The traps can be set next to areas with significant mosquito populations (e.g., reservoirs, roadside drainage ponds and culverts). This use of traps attractive to mosquitoes prevents the need for indiscriminate insecticide spraying. Attractive toxic sugar bait sprayed on vegetation has been successful in controlling ''Anopheles'' mosquitoes in outdoor environments. Additionally, indoor ATSB shows promise as a supplement to mosquito nets for controlling mosquitoes. Indoor ATSB constitute a novel application method for insecticide classes that act as stomach poisons and have not hitherto been exploited for mosquito control. Combined with long lasting insecticidal nets (LLINs), indoor use of ATSB has the potential to serve as a strategy for managing

insecticide resistance Pesticide resistance describes the decreased susceptibility of a pest population to a pesticide that was previously effective at controlling the pest. Pest species evolve pesticide resistance via natural selection: the most resistant specimens su ...

. Mortality rates of indoor ATSB were comparable to LLINs previously tested against the same species in the same area. Boric acid is only marginally more toxic to most lifeforms than normal

table salt Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quantitie ...

, with exposure in humans and other mammals widely regarded as being safe. Its use as an insecticide in malarial control (instead of compounds which demonstrate high levels of mammalian toxicity or

carcinogen A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis (the formation of cancer). This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes. Several radioactive substan ...

icity) is thus seen as advantageous. ATSBs can affect insects that are not the target. In one instance, bees collected sugar from attractive non-toxic sugar baits dyed with food coloring, and the honey they produced was a different color. To avoid killing bees, it has been suggested that the ATSBs could have nets to keep the bees out, while letting harmful insects to fall for the baits.

References

{{insecticides Malaria Environmental effects of pesticides Insecticides