In 1986, desert locust, Schistocerca gregaria (Forskal), populations in Ethiopia and Sudan developed to plague status. Swarms moved and bred across Sahelian Africa to reach Morocco and Algeria in 1987. On 15 March 1988, Tunisia was invaded by swarms for the first time in 28 years, and until 14 May, 21 of Tunisia's 23 governorates were infested. Although Tunisia was largely unprepared for a locust plague, control was conducted in 360 000 ha to protect crops. Systems for swarm detection and control, and the modified system for increased efficiency developed in anticipation of more spring (and autumn) locust infestations are described. This most recent desert locust plague of Tunisia is documented to serve as a reference on a specific country which, until now, did not exist in published literature. Locust survey and control methods, environmental and human safety concerns, and prevention of future plagues are discussed. © 1993.
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