The present study has been carried out to develop virus free plantlets of sweet potato using the shoot tip culture.The sweet potato variety Hongguniang 2 was used as experimental materials to study effects of various concentrations and combinations of 6-BA,NAA and GA3,size of the shoot tip and soaking at different temperature for different times on virus free shoot tip culture.The virus in regenerating plantlet clones was detected using indicator plant method.The results showed that different combinations w...