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The occurrence and distribution of species of xiphinema and longidorus in Israel
Year:
1969
Source of publication :
Nematologica
Authors :
Cohn, Eli
;
.
Volume :
15
Co-Authors:
Cohn, E., The Volcani Institute of Agricultural Research, Bet Dagan, Israel
Facilitators :
From page:
179
To page:
192
(
Total pages:
14
)
Abstract:
Ten species of Xiphinema (X. brevicolle, X. diversicaudatum, X. elongatum, X. index, X. ingens, X. insigne, X. italiae, X. mediterraneum, X. pini and X. turcicum) and six species of Longidorus (L. africanus, L. brevicaudatus, L. laevicapitatus, L. taniwha, L. vineacola and Longidorus sp.), their regional distribution, nature habitats and relative frequency of occurrence in cultivated fields, are reported from Israel. Males of X. brevicolle and X. insigne, hitherto unknown, are described and additional data on the male of X. mediterraneum are presented. Vertical distribution studies on seven species of Xiphinema and two species of Longidorus revealed maximum population levels of all species in the 0-30 cm layer, with a decrease in numbers with increasing depth. Proportions of adult females in relation to larval stages, studied on three ubiquitous species of Xiphinema, were found to increase with increasing depth. No consistent or characteristic pattern in seasonal fluctuations could be discerned in total field populations of any of the species studied; however, a peak in the proportion of adults was observed in most species during the summer months of May-July. A constant relationship was found between the occurrence of the ubiquitous and apparently polyphagous nematode species and soil type. X. mediterraneum, the smallest species identified, was predominant in clayey and poorly aerated soils; most other species prevailed in lighter soils, their relative population sizes increasing in these soils in an almost direct relationship to their volumes. © 1969 BRILL.
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DOI :
10.1163/187529269X00614
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30923
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:58
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Scientific Publication
The occurrence and distribution of species of xiphinema and longidorus in Israel
15
Cohn, E., The Volcani Institute of Agricultural Research, Bet Dagan, Israel
The occurrence and distribution of species of xiphinema and longidorus in Israel
Ten species of Xiphinema (X. brevicolle, X. diversicaudatum, X. elongatum, X. index, X. ingens, X. insigne, X. italiae, X. mediterraneum, X. pini and X. turcicum) and six species of Longidorus (L. africanus, L. brevicaudatus, L. laevicapitatus, L. taniwha, L. vineacola and Longidorus sp.), their regional distribution, nature habitats and relative frequency of occurrence in cultivated fields, are reported from Israel. Males of X. brevicolle and X. insigne, hitherto unknown, are described and additional data on the male of X. mediterraneum are presented. Vertical distribution studies on seven species of Xiphinema and two species of Longidorus revealed maximum population levels of all species in the 0-30 cm layer, with a decrease in numbers with increasing depth. Proportions of adult females in relation to larval stages, studied on three ubiquitous species of Xiphinema, were found to increase with increasing depth. No consistent or characteristic pattern in seasonal fluctuations could be discerned in total field populations of any of the species studied; however, a peak in the proportion of adults was observed in most species during the summer months of May-July. A constant relationship was found between the occurrence of the ubiquitous and apparently polyphagous nematode species and soil type. X. mediterraneum, the smallest species identified, was predominant in clayey and poorly aerated soils; most other species prevailed in lighter soils, their relative population sizes increasing in these soils in an almost direct relationship to their volumes. © 1969 BRILL.
Scientific Publication
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