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Situation Update: Locust Crisis in Madagascar - 10 December 2013
The adult locust populations (winged locusts) which had survived the dry and cool season matured and laid eggs during October. In the invasion area, hatching started in late October and continued until the first decade of November, giving rise to hopper groups and bands, which developed under good ecological conditions throughout the month.
During the second decade of November, last instar hoppers prevailed at densities varying from 60 to 1 000 hoppers/m² and reaching up to 10 000 hoppers/m². Fledging started during the third decade and some groups of adults were observed. In the outbreak area, breeding started later and hopper development was still in progress during the third decade of November; densities up to 500 hoppers/m² were reported.
In the invasion area, a total of almost 20 000 hectares was protected against hopper bands up to 3rd instar while 16 500 hectares were treated against later hopper instars and young adults of the new generation. In the outbreak area, more than 13 000 hectares were treated. In some areas, aerial operations were hampered by insecurity.