Manual for Diagnosis of Screw-worm Fly - xcs consulting
Manual for Diagnosis of Screw-worm Fly - xcs consulting
Manual for Diagnosis of Screw-worm Fly - xcs consulting
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A <strong>Manual</strong> <strong>for</strong> the <strong>Diagnosis</strong> <strong>of</strong> <strong>Screw</strong>-Worm <strong>Fly</strong><br />
6 – Keys to immature stages<br />
The keys include only those species causing or closely associated with myiasis and presume<br />
that the material <strong>for</strong> diagnosis was obtained from live or very recently dead hosts.<br />
Any material keying out to either <strong>of</strong> the two SWF species should be confirmed by specialists<br />
at the Australian National Insect Collection (ANIC), CSIRO Division <strong>of</strong> Entomology, Canberra,<br />
ACT 2601; Fax (02) 6246 4000.<br />
6.1 Eggs<br />
Eggs and egg masses can <strong>of</strong>ten be identified to species or species group level using the<br />
following characters; colour, size (length and diameter), relative length and width <strong>of</strong> the<br />
hatching lines with their enclosed median strip, and the shape <strong>of</strong> the strip at the anterior,<br />
micropylar end (Figs 11, 15) (Kitching 1976, Erzinçlioglu 1989).<br />
1. Median strip occupies 20-30% <strong>of</strong> the diameter and almost the full length <strong>of</strong> the egg<br />
including anterior and posterior poles, eggs laid parallel and firmly attached to each<br />
other and the oviposition substrate, white or whitish, small (
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