PLANT NEMATODES THE GROWER SHOULD KNOW 45


































 Figure 30.-Drawing of a root fragment of longleaf pine (Pinus palustris Mill.)
exhibiting the posterior ends of three different specimens (arrows) of Hoplolaimus
coronatus Cobb protruding from the broken root surface; 65 specimens were counted
from a piece of root one inch long. Material collected by the author near Tifton,
Ga., November 1940; x 136.
approximate order of their susceptibility to damage, which is not neces-
sarily that of the abundance of nematodes in their roots:
1. Okra 15. Old World Grapes 30. Rape
2. Tomatoes 16. Irish potatoes 31. Radishes
3. Eggplant 17. Watermelons 32. Sweet potatoes
4. Cucumber 18. Lettuce 33. Asparagus
5. Cantaloupes 19. Careless weed 34. Soybeans
6. Celery 20. Beets 35. Pecans
7. Beans 21. Pineapples 36. Sugar cane
8. Dasheens 22. Cotton 37. Mustard
9. Peppers 23. Cabbage 38. Violets
10. Squash 24. Cauliflower 39. Japanese persimmons
11. Figs 25. Collards 40. Catalpa
12. Peas 26. Sunflowers 41. Kudzu
13. Peaches 27. Carrots 42. Quince
14. Roses 28. Bananas 43. Peanuts
 29. Papaya
 On land which is heavily infested it is impossible to profitably grow
okra, tomatoes, eggplants and others near the head of this list.