Nematode structure and life: Wide range of life habits requires combination of characters for identification of parasites classified among nematodes
AuthorsA. R. Maggenti
M. W. Allen
Authors AffiliationsA. R. Maggenti is Assistant Nematologist, University of California, Davis; M. W. Allen is Professor of Plant Nematology, University of California, Davis.
Hilgardia 13(9):5-12. DOI:10.3733/ca.v013n09p5. September 1959.
The many thousands of species of nematodes in the phylum Nemata are a group of animals commonly placed into four categories: parasites of man and animals; parasites of plants; species living in marine and brackish water; and free-living soil and fresh-water species. No single character or criterion can be used to distinguish nematodes from other similar animals, although one feature-not structural–sets nematodes apart, and that is the tremendous variation in size. Nematodes vary in length from the 1/125" ectoparasites of plants to the 25' long parasite of whales.
Also in this issue:Plant nematology in California: State's: Crop losses led to first department for research in plant nematology to be established by experiment stations
Nematodes in plant quarantine: Detection of plant parasitic nematode infestations difficult because of complexity of possible causes of visible symptoms
Field and vegetable crops: Wide ranges of crops and climatic conditions in California necessitate development of several diverse control programs
Nematodes in grape production: Distribution records show multiple infestations of two or more species of nematodes to be in most of California's vineyards
Citrus and avocado nematodes: Spread by nursery stock, by contaminated implements, and by water from irrigation canals that may drain infested land
Deciduous fruit and nut trees: Root-knot nematode on peach and root-lesion nematode on walnut cause serious problems for California orchardists
Nematodes on ornamentals: Root-knot, root-lesion, and more specialized or exotic forms may cause acute injuries in nursery, greenhouse, and garden
Biochemical relationships: Nematodes, plants, and linking soil components of complex problem of widespread, important pest of state's agriculture
Natural enemies of nematodes: Studies of complex soil environment aimed at favoring fungi and other organisms that limit plant nematode populations
Chemical control of nematodes: Effective nematocides relatively few in number but available in several forms for field use on perennial and annual crops
Factors influencing the results of fumigation of the California red scale
Inheritance of resistance to hydrocyanic acid fumigation in the California red scale