Nematology 100: LECTURE 9
Migratory Endoparasites - Pratylenchidae
- Migratory endoparasites - increasing specialization?
- Overlapping esophageal glands.
- What changes in control of behavioral traits required? How is the behavior
controlled? What are the signals?
- How inherited? Could the memory/instinct/control be destroyed to result in
aberrant behavior - e.g. ectoparasitic feeding?
Are there common characteristics?
- The problem of host defense mechanisms - necrosis, hypersensitivity,
phenolics. DAMPs and PAMPs
- Apples - the replant problem
- Peaches - amygdalin, prunasin
- Management - resistance? - not much available, not specialized enough.
- Consider transgenic options with rootstocks: Mycogen corp (San Diego) has
Bt gene effective against Pratylenchus.
- Chitinase genes (only effective against eggs?)
- Snowdrop lectin
- Studies with trichosanthin (ribosome inhibiting protein).
- Clean planting stock
- Site preparation - inoculum removal
- Rotation, cropping systems, nematicides
- Therapy - hot water/formalin, corm/rhizome surgery
|671 Radopholus, FL R. citrophilus
|672,673 toppling R. similis
|673,935,937,938,936 roots and corm lesions,
|934 toppling, banana
|1025 citrus, Florida, Radopholus 400 lb DD,