Manual for Diagnosis of Screw-worm Fly - xcs consulting

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Screw-worm fly sticky trap design and assembly Figure 34: Screw-worm fly trap. 55 Agriculture, Fisheries and Forestry - Australia sticky pad The trap is supplied either complete or as a kit ready for assembly.
A Manual for the Diagnosis of Screw-Worm Fly Measure solids first and add liquids, adding dimethyl disulphide last. It is crucial that the correct chemicals be used, especially the n-isomers of butyric and valeric acids. Care must be taken when mixing and dispensing swormlure which is very caustic, and has a long-lasting and unpleasant odour. Store in a refrigerator not used for foodstuffs. The traps are suspended by cords from trees or posts at a height of about 1.5m. For surveillance, maximising the opportunity for catching SWF is important and shady sites at the edge of wooded areas, near water sources or cattle camps are recommended. Close proximity to rubbish dumps or animal carcasses will result in large numbers of secondary blowflies on the traps and these sites should be avoided. Traps can be serviced at convenient intervals from daily to weekly. Up to 10 days exposure can be used but trapped flies deteriorate with time. In some locations, foraging stingless bees may remove the adhesive. When serviced, the aluminium plate is replaced and the swormlure container replenished. When large numbers of traps are being serviced, trap plates can be stored in plywood boxes (35 x 60cm in cross section) of sufficient length to hold the number of (paired) plates required. Flies on the trap plate are removed with forceps and placed on appropriately labelled (locality, trap number, date, etc.) cards or plastic petri dishes, using the residual adhesive to attach fly to card or dish. Cards or dishes can be stored in a freezer to await microscopical examination and identification. Larva of the New World screw-worm fly Cochlimyia hominivorax. Scanning electron microscope photograph by Colin Beaton 56
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A Manual for the Diagnosis of J.P.
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© Commonwealth of Australia 2002 R
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A Manual for the Diagnosis of Screw
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1. Introduction Agriculture, Fisher
Page 10 and 11:
The predicted distribution of C. be
Page 12 and 13: Figure 4: Life cycle of the Old Wor
Page 14 and 15: 2.4 Larval development 7 Agricultur
Page 16 and 17: 2.5 Pupariation Within 24 hours (at
Page 18 and 19: The egg of C. bezziana is white, 1.
Page 20 and 21: Figure 12: Details of larval morpho
Page 22 and 23: 4- Myiasis: Differential Diagnosis
Page 24 and 25: 5. Flies causing myiasis The follow
Page 26 and 27: Agriculture, Fisheries and Forestry
Page 28 and 29: 21 Agriculture, Fisheries and Fores
Page 30 and 31: Figure 15: Eggs of several species
Page 36 and 37: Figure 17 (contd): Morphology of th
Page 38 and 39: Figure 19: Cochliomyia hominivorax
Page 40 and 41: Figure 21: Chrysomya megacephala th
Page 42 and 43: Figure 23: Chrysomya rufifacies thi
Page 44 and 45: Figure 25: Chrysomya varipes third
Page 46 and 47: Figure 27: Lucilia species third in
Page 48 and 49: 6.3 Puparia Agriculture, Fisheries
Page 50 and 51: 7. Keys to adults 7.1 Morphological
Page 52 and 53: 45 Agriculture, Fisheries and Fores
Page 56 and 57: Hydrocarbon content (Table 1) Chrys
Page 58 and 59: Cochliomyia macellaria Agriculture,
Page 60 and 61: 8. Surveillance While SWF remains o
Page 64 and 65: 8.3 Sentinels (Fig. 35, Plate 8) Ag
Page 66 and 67: 9. Acknowledgements Agriculture, Fi
Page 68 and 69: Lockey, K.H (1988). Lipids of the i
Page 70: Plate One. LIFE CyCLE OF SCREW-WORM
Page 74: Plate Three. Plate page Agriculture
Page 78: Plate Five. Plate page Agriculture,
Page 82: Plate Seven. ADuLT FLIES Plate page
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Manual for Diagnosis of Screw-worm Fly - xcs consulting

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