1. Nematology 100
Lecture 12 Slides

2. Aphelenchoides
besseyi
-rice
Aphelenchoides
fragariae
-lily
Aphelenchoides
ritzemabosi
-chrysanthemum

3. Aphelenchoides fragariae - Hosta
Aphelenchoides sp. - Verbena
Aphelenchoides fragariae - Carnation
Aphelenchoides fragariae - Weigelia

4. Bursaphelenchus cocophilus - palm

5. Bursaphelenchus cocophilus – “little leaf” symptoms

6. insecticide traps with pheromone attractant
Bursaphelenchus cocophilus – vector control

7. Bursaphelenchus xylophilus
– pine wilt

8. horizontal gene transfer- HGT
Bursaphelenchus xylophilus
Aphelenchoidea
fungus
horizontal gene transfer- HGT
cellulases – GHF45- glycoside hydrolase family
the evolution of plant parasitism

9. Bursaphelenchus xylophilus
– vector, Monochamus sp.

10. Searching for Bursaphelenchus spp.:
– gray pine, El Dorado County
- found mainly bacterial- and fungal-feeders

11. Signs of bark-beetle damage
to Monterey Pine (Pinus radiata)
Laimaphelenchus sp. is detected
in samples of bark with exuding
resin
feeding on fungi or algae? or…?

12. feeding on fungi or algae? or…?
From tree in foreground:
Laimaphelenchus sp.
– Monterey Pine, El Dorado County
Laimaphelenchus sp.
feeding on fungi or algae? or…?

13. Another aphelench:
Seinura sp. – a predator