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Controlling tsetse with targets
What is the best way of treating targets with insecticide?
However, even if you adopt a long treatment interval, you should still visit the targets every three months to repair/replace them and to ensure that the clearing around them is not overgrown. Regenerating vegetation will obscure the target and hinder its attractiveness. Moreover, vegetation brushing against the target will remove insecticide.
If the project is to treat the targets itself, there are the options to treat at the site where each target is erected, or to treat centrally and take the treated targets out for deployment.
Treatment at site. -- This is usually performed by a presurised knapsack sprayer taken to the site, and spraying to the point of run-off. To get an even application it is usually best to use a nozzle that delivers the droplets in a "fan", as against a "cone". Be sure to adjust the pressure and droplet size so that the maximum amount of spray soaks into the cloth, as against bouncing off or getting blown away.
Central treatment. -- One advantage of this is that it can be more readily supervised to ensure that the treatment is correct.
You might find that a combination of treatment options is most convenient, treating centrally when the targets are first deployed, and spraying at the sites when replenishing the insecticide. This saves the inconvenience of removing the target cloth from its frame, transporting it to and fro and then erecting it again.
The central treatment of targets is best performed by dipping, brushing or using a paint-roller, rather than spraying.
Dipping. -- This method is the simplest if the whole of the target cloth is to be treated with insecticide. Fill a large tub with enough dip to treat about ten targets and add the targets, using a wooden stick to move the targets around, so ensuring even uptake.
Brushing or paint-rolling. -- This method is the best if only part of the target cloth is to be treated.
Tsetse Plan provides advice on how to construct systems for the mass
treatment of targets.
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