Nematology 100: LECTURE 15

Rev. 10/14/2008

Nematodes Parasites of Higher Plants

Sedentary Endoparasites

Meloidogyninae

    Meloidogyne

Note: International project on this single genus - J.N. Sasser, US-AID, from about 1975 to 1985.

Objectives:

  1. Identify species and biotypes of root-knot nematodes within each of 6 geographical regions.
  2. Determine resistance/susceptibility of food crops in each region, identify sources of resistant germplasm.
  3. Evaluate crop response in each region.
  4. Study variability within each species, including host reaction, morphology, cytogenetics, etc.
  5. Evaluate environmental factors influencing distribution in each area.
  6. Develop effective integrated crop protection systems for control of root-knot nematodes in each region.

There are about 75 described species in the genus.

Contrast with Heteroderinae

M. hapla - northern rootknot nematode
M. incognita - cotton rootknot nematode
M. javanica

Nacobboderinae

    Nacobbodera

 

Slides:  Sedentary Endoparasites

477
632
1633 J2 at root tip
633
634
1634 j2 swelling
1635 flourescent antibody of dorsal gland secretions
1658 anterior of female
635
637
882
898
289 female om pinhead
646 perineal patterns
647 "
648 "
649 "
1631 esterase patterns
? Williamson et al - DNA bands
414 symptoms
416
636
403
641
901
640
642
643
696
700
869
355
765
1072
1073
317
314
1672 Conklin and Opperman rnase
1671
1673
1674