Make sure the yam you choose looks healthy. If you notice discoloration or lesions on the skin, your yam could be diseased, which means its sprouts could be diseased, too. Choose a yam variety like TDA 291 or TDA 297 that is resistant to Scorch, a fungal disease that causes spots and lesions. [2] X Research source
Each yam can produce up to 50 sprouts.
Slips can also be purchased online.
Press soil down lightly to get rid of any air pockets.
Yam mosaic disease. Caused by aphids, this condition results in yellow and light green discoloration on the leaves. To prevent this disease, keep the growing area free of weeds and use disease-free slips. If you notice diseased plants, remove them immediately. [10] X Research source Dry rot disease. This condition causes light yellow lesions on the outer skin, eventually turning the entire yam black. Use disease-free slips to prevent dry rot. If your yams have this disease, soak them in hot water for an hour post-harvest to lessen the effects. [11] X Research source Mealy bugs. This insect looks like a white, cotton-like oval. Mealy bugs can hinder growth and attract ants. Treat mealy bugs by removing infected plants and using insecticide sprays for large infestations. [12] X Research source White scale insects. These insects create tiny white scales on the skin of yams and can slow growth. Treat infected plants with insecticidal soap. [13] X Research source
