Outbreaks of B. tryoni have also occurred in Perth,
Western Australia, but were eradicated (Horticultural Policy
Council 1991). In early 2011, B. tryoni was detected in an
urban area at Highgate, Perth (Western Australia Department
of Agriculture and Food 2011), suggesting that B. tryoni
remains a potential threat to the other parts of Australia.
Synthetic insecticides such as the organophosphates
dimethoate and fenthion can be used as cover sprays for
preharvest control of B. tryoni infestations. However, because
of potential human dietary risks, the use of dimethoate on
certain horticultural crops and all food-producing plants in the
home garden was suspended in Australia for 1 year from 6
October 2011