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How do I stop ants eating the catch?
The problem gets worse once the trap has been in position for a few days, when the ants seem to have become used to the fact that the traps provide a regular feast. So, unless special efforts are taken to stop the ants, the numbers of flies found in a trap can decline sharply. A declining catch in a monitoring trap may indicate a successful control operation – or that ants are eating all the flies! How can we stop this?
Insecticide. -- The most effective solution is to put a few
drops of insecticide in the trap cages -- the pyrethroid used for the
cattle or targets will do. These pyrethroids are not repellent, and quickly
kill any ants (and tsetse) that get into the cage. Be wary of using other
insecticides that are highly volatile, such as dichlorvos. Such insecticides
can be repellent.
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