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Feeding of Longidorus Caespiticola On Rye-Grass, Loli Um Perenne

Feeding of Longidorus Caespiticola On Rye-Grass, Loli Um Perenne FEEDING OF LONGIDORUS CAESPITICOLA ON RYE-GRASS, LOLI UM PERENNE BY ANGELA TOWLE AND C. C. DONCASTER University of Reading, Reading, Berks. and Rothamsted Experimental Station, Harpenden, Herts., England The way Longidorus caespiticola fed on rye-grass roots was studied, using cinemicrography. Despite disturbing one another the nematodes often fed gregariously and mating was thereby facilitated. Root tips attacked previously were the preferred feeding sites and before penetrating them nematodes explored them only briefly. Full protraction of the stylet always preceded ingestion. Salivation was inferred from host responses, and characteristic contractions of the oesophageal bulb may assist saliva flow. The 'salivation phase' was interspersed with short bouts of pumping by which the nematodes apparently tested the suitability of food cells. They then either withdrew or proceeded to ingest by prolonged pumping with the oesophageal bulb. The mechanism of pumping is described and discussed. Feeds lasted up to about 6 hr. Species of LoyzgidorTr.r seriously damage crop plants, both directly and as virus vectors (Hooper, 1973), but feeding mechanisms and behaviour in this genus are not well known, partly because most species are difficult to maintain under con- ditions favouring observation. In contrast, the feeding of several Xiphinema spp. has been http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Feeding of Longidorus Caespiticola On Rye-Grass, Loli Um Perenne

Towle, Angela; Doncaster, C.C.
Nematologica , Volume 24 (3): 9 – Jan 1, 1978
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529278X00245
Publisher site
See Article on Publisher Site

Abstract

FEEDING OF LONGIDORUS CAESPITICOLA ON RYE-GRASS, LOLI UM PERENNE BY ANGELA TOWLE AND C. C. DONCASTER University of Reading, Reading, Berks. and Rothamsted Experimental Station, Harpenden, Herts., England The way Longidorus caespiticola fed on rye-grass roots was studied, using cinemicrography. Despite disturbing one another the nematodes often fed gregariously and mating was thereby facilitated. Root tips attacked previously were the preferred feeding sites and before penetrating them nematodes explored them only briefly. Full protraction of the stylet always preceded ingestion. Salivation was inferred from host responses, and characteristic contractions of the oesophageal bulb may assist saliva flow. The 'salivation phase' was interspersed with short bouts of pumping by which the nematodes apparently tested the suitability of food cells. They then either withdrew or proceeded to ingest by prolonged pumping with the oesophageal bulb. The mechanism of pumping is described and discussed. Feeds lasted up to about 6 hr. Species of LoyzgidorTr.r seriously damage crop plants, both directly and as virus vectors (Hooper, 1973), but feeding mechanisms and behaviour in this genus are not well known, partly because most species are difficult to maintain under con- ditions favouring observation. In contrast, the feeding of several Xiphinema spp. has been

Journal

Nematologica – Brill

Published: Jan 1, 1978

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