I tried to extract plant virus (RNA genome) from ginger leaves but there are a lot of inhibitors when I come to cDNA and RT-PCR sometimes. I want to get expertise advice from those who worked with the plant.
we also met same problem in our study. You can use charcoal during extraction of leaves for reducing effect of inhibitors. I am sending web connection of our study as follows:
Article Simultaneous detection of Apple mosaic virus in cultivated h...
I think and hope it will be helpful for you. Good luck.