Botanical name: Dioscorea spp.
VARIETIES
White yam. D. rotundata
Water yam. D. alata
Yellow yam. D. cayensis
Trifolia yam. D. dumentorium
Aeriel yam. D. bulbifera
Chinese yam. D. esculenta
LAND PREPARATION
1. Clear land
2. Ploughing
3. Harrowing
4. Ridging
PESTS
1. Nematodes
2. Yam tuber beetle
3. Yam shoot beetle
4. Rodents
5. Grasshopper
CONTROL
1. Apply insecticides
2. Use Aldrin dust
3. Practise crop rotation
4. Set traps
5. Use Agrocide 3 powder
DISEASES
1. Yam dry rot
2. Fungal leaf spot
3. Yam mosaic
CONTROL
1. Destroy all infected crops
2. Plant resistant varieties
3. Farm sanitation
4. Practice crop rotation
