small knots but clearly visible 2 method_of knotting on main roots 6 4 larger knots predominate but main roots clean 9 all roots severely knotted, plant likely dying 7 majority of main roots knotted 5 50% of roots infested, a few knots on main root, reduced root system variable_of 3 some larger knots visible acronym 1 few small knots, difficult to find entity all main roots knotted, few clean roots 8 scale_of no knots on roots 0 attribute 0-10 root-galling severity scale