This section describes flies, where they strike and under what conditions.
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Factors that determine the susceptibility of sheep to flystrike.
Issues associated with breech strike.
Issues associated with body strike.
Other types of strike
Strike, other than breech and body strike.
About flies, including their lifecycle.
NSW DPI information sheet on identifying blowflies.
Seasonal conditions and geography
Conditions and geography under which flies are more active
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Research over many years has shown that the two most important factors affecting breech strike risk are breech wrinkle and dag.
Research over many years has shown that the most important factor affecting the risk of body strike is the presence of fleece rot.
The Australian sheep blowfly, Lucilia cuprina, initiates over 90% of all flystrike in the Australian flock. Other fly species will strike sheep but only in small numbers and do not escalate into fly waves.
Ideal conditions for the blowfly involve warm (17ºC–38ºC), humid weather. They do not like;
In general, paddocks that are more exposed to wind, with less ground cover, timber and wet spots, will have less flystrike risk , making them more suitable for high risk mobs of sheep, such as marked lambs, daggy sheep and lambing ewes.
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