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The Development and Life History of the False Root-Knot Nematode, Nacobbus Serendipiticus

The Development and Life History of the False Root-Knot Nematode, Nacobbus Serendipiticus THE DEVELOPMENT AND LIFE HISTORY OF THE FALSE ROOT-KNOT NEMATODE, NACOBBUS SERENDIPITICUS BY SYBIL A. CLARK Rothamsted Experimental Station, Harpenden, Herts., England The development and life history of Nacobbus serendipiticus was studied from the egg to maturity and the early stages recorded by cinematography. There are four moults, the first in the egg. The four larval stages are described and their behaviour in relation to tomato roots. The sex of larvae can be determined at the end of the third stage by the development of the gonads. Damage to the host roots caused by the larvae feeding and invading is followed by necrosis of cortical cells. Galls occur only in association with adult females; they contain a spindle-shaped mass of small cells in which starch grains were found. Of 25 plant species tested for susceptibility, mature females were recovered from eight. The nematodes can survive the winter in England but are probably not indigenous. Nacobbus serendipiticus Franklin has been found only once in Britain, infesting tomato roots in a glasshouse, and causing galls superficially like those caused by Meloidogyne hapla. A subspecies, N. s. bolivianus, was described by Lordello, Zamith & Boock (1961) galling the roots of Solanum http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

The Development and Life History of the False Root-Knot Nematode, Nacobbus Serendipiticus

Clark, Sybil A.
Nematologica , Volume 13 (1): 11 – Jan 1, 1967
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529267X00977
Publisher site
See Article on Publisher Site

Abstract

THE DEVELOPMENT AND LIFE HISTORY OF THE FALSE ROOT-KNOT NEMATODE, NACOBBUS SERENDIPITICUS BY SYBIL A. CLARK Rothamsted Experimental Station, Harpenden, Herts., England The development and life history of Nacobbus serendipiticus was studied from the egg to maturity and the early stages recorded by cinematography. There are four moults, the first in the egg. The four larval stages are described and their behaviour in relation to tomato roots. The sex of larvae can be determined at the end of the third stage by the development of the gonads. Damage to the host roots caused by the larvae feeding and invading is followed by necrosis of cortical cells. Galls occur only in association with adult females; they contain a spindle-shaped mass of small cells in which starch grains were found. Of 25 plant species tested for susceptibility, mature females were recovered from eight. The nematodes can survive the winter in England but are probably not indigenous. Nacobbus serendipiticus Franklin has been found only once in Britain, infesting tomato roots in a glasshouse, and causing galls superficially like those caused by Meloidogyne hapla. A subspecies, N. s. bolivianus, was described by Lordello, Zamith & Boock (1961) galling the roots of Solanum

Journal

Nematologica – Brill

Published: Jan 1, 1967

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