The objective of this investigation work was to make an evaluation about diseases and morphology of eight sugarcane varieties, in the first soca ( stem of sugarcane which reproduce after the first crop), under the agro climatic conditions in the Huallaga Central Valley. The work was made around the next places called Puerto Rico (Sector), Caspizapa (District), and Picota (province), with an average Temperature of 27.27° C for month, Relative Humidity of 80.09 % andan Accumulated Precipitation of 967.60mm, while was developed the study, a soil characterized for clay, with pH of 8, 13. Located in a tropical dry forest zone. The statistics design used was for random sampling of blocks with eight treatments and three repetitions. Finally, we found that M74-458 and M69-420 varieties have a high susceptibility to a disease root rot, which is caused for Pythium sp an Nigrospora sp (57.52 and 6...