6 1/3 and < 2/3)]]> attribute Clear symptoms at <5% per plot 3 4 Clear symptoms at 6 to 15% of plants per plot Clear symptoms for all plants (not fully defoliated) 8 scale_of acronym 9 Severe symptoms for all plants per plot (fully defoliated) method_of Clear symptoms at 16 to 33% of plants per plot (less than a 1/3) 5 7 Clear symptoms for 67?99% of plants per plot (2/3 to almost all) No symptoms 1 Unclear symptoms 2 variable_of entity RnAlt 9 pt. scale