FIG. 16(i). Spatial distribution of sawfly larvae (Hymenoptera : Symphyta, Tenthredinidae) in cereal
crops in the West Sussex study arm for mid June in each of the three years 1969-1971. Areas with
more than 6 per square metre are enclosed by a broken line, areas with more than 12 per square
metre are shaded.
crops in the West Sussex study arm for mid June in each of the three years 1969-1971. Areas with
more than 6 per square metre are enclosed by a broken line, areas with more than 12 per square
metre are shaded.