Figure 5 in Experimental induction of resins as a tool to understand variability in ambers

Figure 5. Experimental Wollemia nobilis examples: (a–b) cutoff treatment in which the trees were cut at 20 cm above soil level to mimic catastrophic damage; (c–d) insect treatment in which holes were drilled into the top 20 % of the trunks to mimic wood-boring insect attack; (a) day 1 of cutoff treatment (aerial view); (b) final day of cutoff treatment with viscous white resin visible; (c) day 1 of the insect treatment with one drilled hole and initial resin exudation visible (arrowhead); (d) final day of insect treatment in which three drill holes have exuded less viscous white resin (arrowheads).