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Factors Influencing the Citrus Nematode and Its Control On Citrus Replants in Arizona1 )

Factors Influencing the Citrus Nematode and Its Control On Citrus Replants in Arizona1 ) FACTORS INFLUENCING THE CITRUS NEMATODE AND ITS CONTROL ON CITRUS REPLANTS IN ARIZONA1 ) BY HAROLD W. REYNOLDS AND JOHN H. O'BANNON Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Tempe, Arizona, U.S.A. A preplanting soil fumigation experiment was done under hot desert conditions in Arizona to study citrus nematode control and response of young grapefruit trees planted in place of old infected trees. D-D was applied at the rates of 425 and 850 liters per hectare. Untreated plots served as controls. Almost complete control of citrus nematodes over a 3-year period was obtained at both levels of fumigation and also in the unfumigated plots. Control in the untreated plots was probably due to the high soil temperature on unshaded soil around the young trees. As the trees grew and provided shade, the nematode population increased in the untreated plots. Tree measurements taken annually for 6 years showed a steady growth rate but no differences in rate of growth of differently treated trees. Thomas (1923) first demonstrated under controlled conditions that when the roots of young trees are infected by the citrus nematode, T ylenchuluJ semi penetrans Cobb, root development and growth of the top http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Factors Influencing the Citrus Nematode and Its Control On Citrus Replants in Arizona1 )

Nematologica , Volume 9 (3): 4 – Jan 1, 1963

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529263X00854
Publisher site
See Article on Publisher Site

Abstract

FACTORS INFLUENCING THE CITRUS NEMATODE AND ITS CONTROL ON CITRUS REPLANTS IN ARIZONA1 ) BY HAROLD W. REYNOLDS AND JOHN H. O'BANNON Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Tempe, Arizona, U.S.A. A preplanting soil fumigation experiment was done under hot desert conditions in Arizona to study citrus nematode control and response of young grapefruit trees planted in place of old infected trees. D-D was applied at the rates of 425 and 850 liters per hectare. Untreated plots served as controls. Almost complete control of citrus nematodes over a 3-year period was obtained at both levels of fumigation and also in the unfumigated plots. Control in the untreated plots was probably due to the high soil temperature on unshaded soil around the young trees. As the trees grew and provided shade, the nematode population increased in the untreated plots. Tree measurements taken annually for 6 years showed a steady growth rate but no differences in rate of growth of differently treated trees. Thomas (1923) first demonstrated under controlled conditions that when the roots of young trees are infected by the citrus nematode, T ylenchuluJ semi penetrans Cobb, root development and growth of the top

Journal

NematologicaBrill

Published: Jan 1, 1963

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