FAO and the World Meteorological Organization (WMO) collaboration on Desert Locust started in 1951. This publication is mainly intended to be used as a general reference guide for use by staff of National Locust Control Centres (NLCCs) and National Meteorological and Hydrological Services (NMHSs) of locust-affected countries. It may also be useful for anyone wanting to know more about Desert Locust and associated meteorological phenomena. The publication contains basic information on the biology and behaviour of Desert Locust, a history of locust events, weather factors that influence locust development and how to use weather information. 48 p.