H- trap - Horse flies are a constant nuisance, particularly during the period May – October in the northern hemisphere. Since they feed on blood, their aggressive stings are very painful not only for animals, such as horses and cows, but also for humans.
When should I set up the H-trap? Pending on temperature the horse flies will come out of the ground from Early spring (European situation: from April onwards) The female horse flies will than immediately start looking for blood, this to fertilize the next batch of eggs. It is important that we have the H-trap in position before this starts happening. This way we will not only catch the horse flies, but also a good amount of potential horse flies, which will become a pest in the next year(s)