How to Control Destructive Crop Pests

Destructive pests can cut yields by over 40% if not controlled early. Good control starts with prevention, not treatment alone.

Integrated Pest Management (IPM)

1. Cultural Prevention

• Rotate crops — don't plant the same family in the same plot two seasons running.
• Remove crop residues and weeds that harbor pests.
• Plant on time — avoid known outbreak windows.

2. Scouting

Inspect the field at least twice a week. Check under leaves, on shoots and flowers. Use yellow sticky traps to monitor whiteflies and aphids, and pheromone traps for Tuta absoluta and caterpillars.

3. Correct Pesticide Use

• Identify the pest first — an aphicide won't necessarily kill caterpillars.
• Follow the label dose — underdosing breeds resistance.
• Rotate chemical groups (MoA rotation) between cycles to prevent resistance.
• Spray early morning or evening — pests are exposed and bees are few.
• Wear protective equipment (PPE): gloves, mask, boots and overalls.
• Respect the pre-harvest interval (PHI) printed on the label.

Major Pests in Tanzania

• Tuta absoluta (tomato) — combine traps + specific products, remove affected leaves.
• Fall armyworm (maize) — treat early into the plant funnel.
• Whiteflies — spread viruses; control early with traps and sprays.
• Aphids — control before mass multiplication.

Bring photos or samples to the shop — we will identify the pest and give you the right product with full instructions.