Figure 1

Physiology of Korean red pines 3 months after inoculation with water, Bursaphelenchus thailandae, or B. xylophilus. Mature trees were wounded and injected with water or with suspensions of 60,000 nematodes per tree. Physiology of the trees was inspected 3 months after treatment. Representative images of trees injected with water (A), B. thailandae (B), and B. xylophilus (C) are shown. Higher magnification images of the regions indicated by red squares are displayed in the right-hand panels.