Why Didn't My Cassava Developed Well?

Are there patches of dark brown or gray fungal growth on stems, necrotic areas are covering buds on the stem?

Are the tubers necrotic, roots develop knots, internal tissues of roots and tubers stained brown?

Are there discolored pale green, yellow, or white mottled leaves which may be distorted with a reduced size?

Are there any small, angular, brown, water-soaked lesions between leaf veins on lower surfaces of leaves?

Are the roots rotted with a foul odor, tubers are swelled and may have light brown, dark gray, blue or pink discoloration, foliage is turning brown and wilting?

Are there any cankers on stems and leaf petioles, leaves drooping downwards, wilting and falling off, soft parts of plant become twisted and distorted?

Are the plants stunted with excessive proliferation of branches, shoots have small leaves, and shortened internodes?

Bud necrosis is a fungal disease of an unknown pathogen. Remove and burn all necrotic stems and crop debris immediately after harvest. Only plant cassava cuttings are taken from healthy plants that are free from necrotic lesions. Space plants widely to allow good air circulation around plants and reduce disease incidence. Remove weeds around plants.

Cassava Brown Streak Disease is a

Cassava Mosaic Disease is a viral disease vectored by whiteflies. Remove and destroy infected plants. Control whiteflies to prevent the disease or plant more resistant cultivars like 'Rwizihiza', 'Ndamirabana', 'Cyizere', 'Seruruseke', 'Mavoka', 'Garukunsubire' and 'Mbakungahaze'.

Cassava Bacterial Blight is the most important bacterial disease of cassava. Bacteria spread by water splash and infected tools. Prune off all infected parts and destroy them. Propagate cuttings only from healthy plants. Intercrop cassava with corn (maize) and melon.

Cassava root rot disease is caused by fungi and is favored by waterlogged, poorly-draining soils. Plant cassava in well-draining soils. Remove and destroy all crop debris by burning. Sanitize all tools after use.

These symptoms indicate a fungal disease - Anthracnose. Keep plants dry when watering to prevent spread. Spray plants with copper when the first fruit develops if you have had problems in the past.

Witches' broom is a disease caused by phytoplasma. The disease is detected in Vietnam, Thailand, Cambodia, Laos, Indonesia, and the Philippines. Remove and destroy any plants suspected of being infected. Remove all cassava debris from the field after harvest.

Yellow, stunted plants and roots that have swollen galls indicate root-knot nematodes. Other symptoms are plants wilting during bright, hot days. Prevent root-knot nematodes by applying parasitic nematodes or solarizing the soil before planting.