Not sure what kind of Bamboo, and what these bugs are??
I live in Fl, Im not sure if that can help, but I recived a Bamboo for Valentines Day, In the shape of a heart. After a while I started noticing these bugs that are white in color, almost in a cacoon, and there not on the leaves themselves. You have to pull the leaves down and they are hidden between the leaves and the stalk in cacoons/ like a cob web. really hard to explain i hope someone can help me understand what these bugs are.
Note. they dont seem to be doing harm maby stunting growth