Crop disease, pest & deficiency library

A fungal leaf disease that thrives in warm, humid summer rainfall regions and can cut maize yields sharply when it reaches the ear leaf before grain fill.

An aggressive water mould that can destroy a tomato or potato block within days under cool, wet, overcast conditions.

Sap-sucking insects that multiply extremely fast in sheltered tunnels and transmit several plant viruses while they feed.

Common on sandy, high-pH soils. Interveinal yellowing reduces photosynthesis, fruit size and next season's bud quality.

A migratory caterpillar pest that feeds inside the maize whorl and can strip young plants within a single week.

A dry-weather fungus that coats leaves and bunches in white powder, reducing sugar accumulation and fruit quality.