3. พัลลภา กฤษณี ไพบูลย์

4. chlorosis and stunting

7. seed gall

8. healthy seed infected seed

9. Lesion root

10. Stubby root

11. Clinging root

12. relative large sphaerical gall

13. spindle shape gall

14. root tip gall

15. small warty elevated spots

16. HOW TO SAMPLE SOIL? 1. Fallow field or area planted to cover crop

17. HOW TO SAMPLE SOIL ? 2. Row crop - take samples from feeder root zone in the row

18. HOW TO SAMPLE SOIL ? 3. Tree - take samples from feeder root zone ( drip line ) in the row

19. HOW TO SAMPLE SOIL ? 4.Individual tree sample plant