Citrus-root nematode: Effects on young lemon and orange trees studied in inoculation tests under controlled conditions
AuthorsR. C. Baines
O. F. Clarke
Authors AffiliationsR. C. Baines is Associate Plant Pathologist, University of California College of Agriculture, Riverside; O. F. Clarke is Senior Laboratory Technician, University of California College of Agriculture, Riverside.
Hilgardia 6(2):9-13. DOI:10.3733/ca.v006n02p9. February 1952.
The citrus-root nematode—Tylenchulus semipenetrans—appears to affect the growth of young citrus trees in four ways: it may injure the bark of the roots; remove plant nutrients during feeding; impair the normal growth and functioning of the roots; and possibly inject a toxic material into the tree. Recently, investigations were undertaken to determine the effects of the nematode on young lemon and orange trees growing under controlled conditions, and to establish the causal relationship of the nematode to the frequent failure of young citrus trees to grow satisfactorily when planted on old citrus soils.
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Livestock diet utilization: Natural vegetation and cultivated feedstuffs should have favorable ratio to value of animal products they produce
Die-back of blackberries: Study of causes and prevention of disease affecting Boysen and Young trailing blackberries
Codling moth on walnut: 1951 tests compare effectiveness of conventional and air-carrier sprayers on Payne walnuts in northern California
Pruning-time studies on grapes: Southern California investigations on relationship between vine pruning time and the so-called grape bud mite problem
Virus diseases of orchids: Transmission of the virus and observation of leaf and other symptoms reveal rare diseases in California
Citrus rootstock problems: Recommendations change as developments within citrus industry reflect influence of rootstock on tree and fruit
Cantaloupe fruit set: Relationship to fertilization, seed development, and fruit growth studied to determine causes of drop
The pink bollworm: Insect pest of cotton thrives in dry climates and is difficult to control by application of insecticides
The resistance of varieties and new dwarf races of tomato to curly top (western yellow blight or yellows)