James G. Horsfall's Plant Disease: An Advanced Treatise. How Disease Is Managed PDF

By James G. Horsfall

ISBN-10: 0123564018

ISBN-13: 9780123564016

ISBN-10: 0323148387

ISBN-13: 9780323148382

Plant illness: a sophisticated Treatise

summary: Plant disorder: a complicated Treatise

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James G. Horsfall's Plant Disease: An Advanced Treatise. How Disease Is Managed PDF

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Similar lectins are known for many common sugars (Sharon and Lis, 1972). 4. Aminopeptidase Profiles Aminopeptidase profiles are currently used for the rapid identification of some zoopathogenic bacteria (Westley et ah, 1967). This technique has also been used to separate some phytopathogenic species of bacteria and fungi (Huber and Mulanax, 1969; Huber et ah, 1970). The assay provides a profile of aminopeptidase activities which may be useful for the identification of an organism or group of organisms.

Choosing the Best Tests Every character of an organism is potentially useful as a diagnostic tool, but not all are equally studied or used. In this section we present the criteria for the selection of new diagnostic tests and we discuss underdeveloped and untested diagnostic techniques. The criteria for the selection of new tests are of utmost importance since it is the use of these criteria which should increase the accuracy and speed of plant disease diagnosis. 1. New Tests Accurate, Rapid, Easy Successfully introduced diagnostic tests are those that tend to be relatively easy to perform, and are rapid and sensitive.

HO W DISEAS E IS DIAGNOSE D 39 flower primordia may indicate a specific nematode as the disease-causing agent. Root injuries by nematodes may also cause indirect effects on above-ground portions of the plant. These symptoms are indistinguishable from and can be confused with other types of root damage or misfunction (Christie, 1959). The presence of plant parasitic nematodes in disease tissue or in the rhizosphere may also indicate a nematode-caused disease (Bergeson, 1969). , 1971), and some knowledge of host range may be used for nematode identification (Christie, 1959).

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Plant Disease: An Advanced Treatise. How Disease Is Managed by James G. Horsfall


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