Abstract
Abstract The invasion of New South Wales for the first time on record by swarms of spur-throated locust, Austracris guttulosa, in 1973 and the course of the plague persisting for three seasons are described. The laboratory and field testing of chemicals was carried out as a form of operational research prior to the development of a control strategy. The subsequent control campaign in New South Wales was based on the u.l.v. aerial spraying of fenitrothion and diazinon against overwintering swarms roosting in trees. The conduct and impact of the campaign are described in relation to damage caused by the locust swarms. An economic analysis indicated net savings of $A4.3 million in crop losses for an outlay of $A0.5 million.
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