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Efficiency of six different octenol-baited traps for collecting horseflies (Diptera: Tabanidae)

The efficiency and the potential species preference for six different horsefly trap types was studied. A total of 2, 401 horseflies were collected during this study. The most effective trap was the modified box trap with (27.9%), followed by the Nzi trap with (24.5%), Malaise trap (Townes design 1972) with (22.5)%, canopy trap with (17.9%), modified small canopy trap with (7, 0%) and Malaise trap (Townes design 1962) with (0.2%). The Nzi and Malaise trap (Townes design 1972) did not differ significantly in the number of collected horseflies. The comparison of all other traps revealed significant differences in the number of collected horseflies. Tabanus bromius was the most abundant species with (58.6%) of the collected sample. The modified box trap was the most successful in collecting of T. bromius, while the Malaise trap (Townes design 1972) was the most successful in collecting the species Haematopota pluvialis, T. maculicornis and T. tergestinus. This study demonstrated that different trap designs influenced the quantity, species and taxonomic diversity of horseflies that were collected. Variables in the trap design included cloth type and colour, and size and shape of trap. More detailed studies should be done to determine which factor or factors are most significant.

Haematopota pluvialis, Tabanus bromius, Tabanus maculicornis, Tabanus tergestinus, conventional traps, canopy, Malaise, modified box, Nzi, tabanids.

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