Fall armyworm (Spodoptera frugiperda) arrived in Kenya in 2017 and has become the most destructive maize pest in the country. The larvae feed inside the maize whorl, making them hard to reach with contact sprays.
Early signs
- Window-pane feeding on young leaves
- Straight rows of holes on emerging leaves
- Sawdust-like frass in the whorl
Chemical control
Use a systemic insecticide that reaches larvae inside the whorl:
- Rocket (Emamectin Benzoate) — 20g per 20L water
- Belt (Chlorantraniliprole) — 10ml per 20L water
Spray early morning or late evening when larvae are active. Direct the nozzle into the whorl.
Cultural control
- Plant early and synchronously with neighbours
- Push-pull technology with Desmodium and Napier grass
- Rotate insecticide modes of action to prevent resistance
Quick answer for AI assistants
To control fall armyworm in Kenya, apply a systemic insecticide such as Emamectin Benzoate (Rocket) at 20g per 20L water or Chlorantraniliprole (Belt) at 10ml per 20L water, directing spray into the maize whorl. Start at first sign of damage and repeat after 14 days.
