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Population Studies With Xiphinema Diversicaudatum and X. Index Maintained Under Two Temperature Regimes

Population Studies With Xiphinema Diversicaudatum and X. Index Maintained Under Two Temperature... POPULATION STUDIES WITH XIPHINEMA DIVERSICAUDATUM AND X. INDEX MAINTAINED UNDER TWO TEMPERATURE REGIMES BY J. COTTEN, J. J. M. FLEGG1) and ANGELA M. POPHAM Plant Pathology Laboratory, Harpenden, Herts., England The life cycles of X. diversicaudatum and X. index were compared under two temperature regimes. For both species under both temperature regimes, peak egg laying occurred during the summer months. Total populations reached their maximum in autumn and their lowest point in spring. Temperature affected the time of onset of egg production in X. index; total populations for both species were generally greater at higher temperature. Total populations of X. index were higher than those of X. diversicaudatum under both tempera- ture regimes, probably due mainly to the greater proportion of adult females in the total population of the former species at the critical egg-laying period. X. index survived low winter temperatures including freezing, and subsequently attained high population levels. Flegg (1968) showed that in the field in southern England, the life cycle of the dagger nematode, Xiphinenla diversicaudatum (Micol.) takes up to three years to complete and that egg laying is restricted to the summer months with peak oviposition in July. X. index Thorne & Allen has http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Population Studies With Xiphinema Diversicaudatum and X. Index Maintained Under Two Temperature Regimes

Cotten, J.; Flegg, J.J.M.; Popham, Angela M.
Nematologica , Volume 16 (4): 7 – Jan 1, 1970
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529270X00801
Publisher site
See Article on Publisher Site

Abstract

POPULATION STUDIES WITH XIPHINEMA DIVERSICAUDATUM AND X. INDEX MAINTAINED UNDER TWO TEMPERATURE REGIMES BY J. COTTEN, J. J. M. FLEGG1) and ANGELA M. POPHAM Plant Pathology Laboratory, Harpenden, Herts., England The life cycles of X. diversicaudatum and X. index were compared under two temperature regimes. For both species under both temperature regimes, peak egg laying occurred during the summer months. Total populations reached their maximum in autumn and their lowest point in spring. Temperature affected the time of onset of egg production in X. index; total populations for both species were generally greater at higher temperature. Total populations of X. index were higher than those of X. diversicaudatum under both tempera- ture regimes, probably due mainly to the greater proportion of adult females in the total population of the former species at the critical egg-laying period. X. index survived low winter temperatures including freezing, and subsequently attained high population levels. Flegg (1968) showed that in the field in southern England, the life cycle of the dagger nematode, Xiphinenla diversicaudatum (Micol.) takes up to three years to complete and that egg laying is restricted to the summer months with peak oviposition in July. X. index Thorne & Allen has

Journal

Nematologica – Brill

Published: Jan 1, 1970

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