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Table 2 Summary of current surveillance and response procedures in New Zealand, Australia and California for B. tryoni and B. dorsalis

From: Establishing criteria for the management of tephritid fruit fly outbreaks

Procedures New Zealand
(B. tryoni and B. dorsalis)
Australia (B. tryoni) California (B. dorsalis)
Surveillance Trapping to Maintain PFA For B. tryoni, a 400 m trapping grid which equates to a density of 6.5 traps per km2 or 0.065 traps per hectare
For B. dorsalis, a 1200 m trapping grid which equates to a density of 0.72 traps per km2 or 0.0072 traps per hectare
For urban areas, a 400 m trapping grid which equates to a density of 6.5 traps per km2 or 0.065 traps per hectare
For production areas, a 1000 m trapping grid which equates to a density of 1.04 traps per km2 or 0.0104 traps per hectare
For urban areas, a 1000 m trapping grid which equates to a density of 1.04 traps per km2 or 0.0104 traps per hectare
For production areas, a 2000 m trapping grid which equates to a density of 0.26 traps per km2 or 0.0026 traps per hectare
Response Triggers Detection of any juvenile life stage or gravid female fly for eradication
OR
Detection of 1 adult male fly for delimitation
OR
Detection of 2 or more* adult male flies for eradication
* depends on the circumstance of the finds
Detection of any juvenile life stage or gravid female fly for eradication
OR
Detection of 2 to 4 adult male flies within 14 days and 1 km for delimitation
OR
Detection of 5 or more adult male flies in 14 days within 1 km for eradication
Detection of any juvenile life stage or gravid female fly for eradication
OR
Detection of 2 adult (non-gravid) flies within 28 days and 4.8 km for delimitation
OR
Detection of 6 (urban) or 8 (commercial) adult (non-gravid) flies within 28 days and 4.8 km for eradication
Size of Export Restriction Zone Depends on the circumstance of the eradication and largely dictated by trading partners 15 km radius 8.2 km radius
Surveillance Trapping to Reinstate the PFA For B. tryoni, a trapping density of 0.283 traps per hectare
For B. dorsalis, a trapping density of 0.142 traps per hectare
For urban and production areas, a trapping density of 6.5 traps per km2 or 0.065 traps per hectare For urban areas, a trapping density of 0.029 traps per hectare
For commercial production areas, a trapping density of 0.022 traps per hectare
Pest Free Area Reinstatement (after last fly detection) Depends on the circumstance of the eradication and largely dictated by trading partners Zero detections within one B. tryoni generation (egg to egg) and 28 days, or 12 weeks (whatever is the longer). No minimum trapping density is specified Zero detections within three B. dorsalis generations (egg to egg)
No minimum trapping density is specified