August
1999
, Volume
83
, Number
8
Pages
710
-
713
Authors
P.
Castillo
,
Research Nematologist, Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Cientificas (IAS-CSIC), Apdo. 4084, 14080-Córdoba, Spain
;
N.
Vovlas
,
Research Nematologist, Istituto di Nematologia Agraria, Consiglio Nazionale delle Ricerche, Via G. Amendola 165/a, 70126-Bari, Italy
;
A. I.
Nico
,
Graduate Student, IAS-CSIC, Universidad de Córdoba, Apdo. 3048, 14080 Córdoba, Spain
; and
R. M.
Jiménez-Díaz
,
Professor, IAS-CSIC and Departamento de Agronomía, Universidad de Córdoba, Apdo. 3048, 14080 Córdoba, Spain
Affiliations
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RelatedArticle
Accepted for publication 5 May 1999.
Abstract
ABSTRACT
High infection rates of olive feeder roots and soil infestation by the cyst-forming nematode Heterodera mediterranea were found in commercial olive orchards cv. Manzanilla established in sandy soils at two localities of Sevilla Province of Andalucía, southern Spain. No disease symptoms were noted on the aboveground plant parts, but slightly distorted feeder roots and necrotic areas were observed near the infection points. Sedentary juvenile stages and adult females showed a semi-endoparasitic feeding habit. Histopathological studies of infected olive roots showed a disease response typical of cyst nematode infection of susceptible hosts. Nematode feeding induced syncytial formation involving cellular alterations in the cortex, endoder-mis, pericycle, and vascular parenchyma tissues in both cortical and endodermal root cells.
JnArticleKeywords
Additional keywords:
cyst nematodes,
host-parasite interaction
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ArticleCopyright
© 1999 The American Phytopathological Society