Subject: Posters

147. Mechanized direct planting system for sweetpotato
H. Hosokawa, H. Fukazawa and T. Watanabe

150. Chemical and hot-water treatments to improve the survival of yam minisetts
L. Kenyon, A. Nwankitiand, E. Ekefan and J. Peters

152. The rapid detection of Colletotrichum gloeosporioides in yam tubers using ELISA
J. C. Peters, M James and L. Kenyon

154. Leaf harvesting effects on leaf retention and pest and disease incidence of cassava (Manihot esculenta Crantz)
M. T. Lahai, I. J. Ekanayake and J. B. George

160. Growth and flowering behaviour of four cassava genotypes in two soil types and locations in southern Nigeria
M. S. C. Simwanbana, I. J. Ekanayaka and T. U. Ferguson