General Biology

Permanent URI for this collection

http://etd.aau.edu.et/handle/123456789/116

Browse

Browsing General Biology by Author "Abate Alemayehu"

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    The Response pof Glossina Pallidipes (Diptera: Glossinidae) Towards Different Trap Designs and Odour Baits At Nechisar National Park, Southern Ethiopia
    (Addis Ababa University, 2001-06) Abate Alemayehu; Girma Melaku (PhD)
    Investigations were carried out in the Nechisar National Park, southern Ethiopia, to determine the preferences of Glossina pallidipes (Diptera: Glossinidae) towards different trap types and odour baits, and to standardize the best bait system for catching this fly. Epsilon, F3 and NG2G traps were evaluated in different vegetation types. In experiment two and experiment three, acetone (450mglh), cow urine (858mglh) and octenol (1.5mglh) were dispensed (both separately and in blends) near traps from glass bottles, plastic bottles and sachets, respectively. The results of all experiments showed that NG2G trap was more effective in catching G. pallidipes than Epsilon and F3 traps. No significance difference was observed between Epsilon and F3 traps. Among odour attractants tested in blends, acetone + cow urine + octenol and acetone + cow urine were highly attractive to G. pal/idipes than acetone + octenol and cow urine + octeno!' The combinations of cow urine and octenol were found to be more attractive than acetone + octeno!' The relatively higher catches obtained by using NG2G traps and cow urine suggests that NG2G trap and cow urine are the best baits for community- based tsetse management. NG2G trap offers some advantages over the other traps used because it is less expensive and is easier to deploy. The availability of cow urine in large quantities with no cost to the rural communities will make fly trapping potentially feasible. Higher percentages of female flies were caught than male flies. All unbaited trap types caught a smaller propoltion of older flies of both sexes. Epsilon, F3 and NG2G traps baited with acetone, cow urine and octenol caught a smaller propoltion of female flies at their older ages and a higher proportion of male flies. NG2G taps deployed with different combinations of acetone, cow urine and octenol caught a higher propOliion of older flies of both sexes. Tabanidae did show a strong response to blends of odour baits, especially to cow urine + octeno!' Biting flies of the sub-family Stomoxyinae respond highly to odour baits and their response varies with vegetation type.