The caterpillars occur in large numbers, march in one direction, aggressively feeding on all grass in their way. They may also occur as scattered populations which may lead to larger outbreaks later
Gawo lotsatira lamphutsili limabwera mochuluka, kuyenda kulowera mbali imodzi, zikudya kwambiri udzu uliwonse omwe zingapeze. Zimabweranso ngati magulu omwazana omwe amaswana ndikufalikira madera ochuluka kwambiri