3 October 2025: Outbreak continues in Mauritania

SUMMARY

In September, a locust outbreak continued to develop in Mauritania, where hopper groups fledge into immature adult groups across the central part of the country, and by the end of the month, new mature adult groups had started a second generation of breeding. A few isolated adults escaped to Senegal and bred locally. Scattered adults and hoppers were observed in eastern Niger, and isolated ones in several locations in Chad. A few isolated adults were found in Algeria. Ecological conditions remain favorable for breeding in many areas, although October and November are expected to be dry across most of the Sahel except its westernmost part. During the forecast period, locust numbers are expected to continue increasing, particularly in Mauritania, with new hopper groups appearing. Some adult groups may also appear in Mali, Niger, Chad, and eventually southern Algeria. Continued surveillance will be essential, and control measures will be necessary. In the Central Region, a few isolated and scattered adults were present in Sudan, where small-scale summer breeding may be occurring in the interior. Summer breeding is expected to conclude with a few groups possibly appearing in November. In the Eastern Region, monsoon rains declined along the Indo–Pakistan border, no locusts were found, and no significant developments are expected.