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Standardizing Visual Control Devices for Tsetse Flies: West African Species Glossina tachinoides, G. palpalis gambiensis and G. morsitans submorsitans
Auteur(s)
Rayaisse, Jean-Baptiste
Solano, Philippe
Mihok, Steve
Date de parution
2012-2-14
In
PLoS neglected Tropical Diseases
Vol.
2
No
6
De la page
1
A la page
8
Résumé
Here we describe field trials designed to standardize tools for the control of Glossina tachinoides, G. palpalis gambiensis and
G.morsitans submorsitans in West Africa based on existing trap/target/bait technology. Blue and black biconical and
monoconical traps and 1 m2 targets were made in either phthalogen blue cotton, phthalogen blue cotton/polyester or
turquoise blue polyester/viscose (all with a peak reflectance between 450–480 nm) and a black polyester. Because targets
were covered in adhesive film, they proved to be significantly better trapping devices than either of the two trap types for
all three species (up to 14 times more for G. tachinoides, 10 times more for G. palpalis gambiensis, and 6.5 times for G.
morsitans submorsitans). The relative performance of the devices in the three blue cloths tested was the same when
unbaited or baited with a mixture of phenols, 1-octen-3-ol and acetone. Since insecticide-impregnated devices act via
contact with flies, we enumerated which device (traps or targets) served as the best object for flies to land on by also
covering the cloth parts of traps with adhesive film. Despite the fact that the biconical trap proved to be the best landing
device for the three species, the difference over the target (20–30%) was not significant. This experiment also allowed an
estimation of trap efficiency, i.e. the proportion of flies landing on a trap that are caught in its cage. A low overall efficiency
of the biconical or monoconical traps of between 11–24% was recorded for all three species. These results show that targets
can be used as practical devices for population suppression of the three species studied. Biconical traps can be used for
population monitoring, but a correction factor of 5–10 fold needs to be applied to captures to compensate for the poor
trapping efficiency of this device for the three species.
G.morsitans submorsitans in West Africa based on existing trap/target/bait technology. Blue and black biconical and
monoconical traps and 1 m2 targets were made in either phthalogen blue cotton, phthalogen blue cotton/polyester or
turquoise blue polyester/viscose (all with a peak reflectance between 450–480 nm) and a black polyester. Because targets
were covered in adhesive film, they proved to be significantly better trapping devices than either of the two trap types for
all three species (up to 14 times more for G. tachinoides, 10 times more for G. palpalis gambiensis, and 6.5 times for G.
morsitans submorsitans). The relative performance of the devices in the three blue cloths tested was the same when
unbaited or baited with a mixture of phenols, 1-octen-3-ol and acetone. Since insecticide-impregnated devices act via
contact with flies, we enumerated which device (traps or targets) served as the best object for flies to land on by also
covering the cloth parts of traps with adhesive film. Despite the fact that the biconical trap proved to be the best landing
device for the three species, the difference over the target (20–30%) was not significant. This experiment also allowed an
estimation of trap efficiency, i.e. the proportion of flies landing on a trap that are caught in its cage. A low overall efficiency
of the biconical or monoconical traps of between 11–24% was recorded for all three species. These results show that targets
can be used as practical devices for population suppression of the three species studied. Biconical traps can be used for
population monitoring, but a correction factor of 5–10 fold needs to be applied to captures to compensate for the poor
trapping efficiency of this device for the three species.
Autre version
http://www.plosntds.org/article/info%3Adoi%2F10.1371%2Fjournal.pntd.0001491
Type de publication
Resource Types::text::journal::journal article
