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Pathogenicity and Population Increase of Paratricho-Dorus Minor as Influenced by Some Environmental Factors
Year:
1975
Source of publication :
Nematologica
Authors :
Cohn, Eli
;
.
Volume :
21
Co-Authors:
Schilt, H.G., Philips-Duphar GmbH. Bosenheimer Str. 231, Bad Kreuznach, Bundesrepublik Deutschland, Germany
Cohn, E., Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
71
To page:
80
(
Total pages:
10
)
Abstract:
The relative importance of the effect of soil temperature, soil texture and host species on the increase and the pathogenicity of a population of Paratrichodorus minor from Israel was studied. Populations increased fastest at 26° C, followed by 30°, 22° and 18°, approaching the host-specific equilibrium density after 90 days. In the presence of a host, populations thrived better in sand and sandy loam than in clay, but were obviously sensitive to moisture fluctuations. Host species affected population increase more than soil temperatures and soil types. In fallow, survival was better in clay and sandy loam than in sand. In vitro, P. minor fed vigorously on epidermal cells in the elongation and meristematic zone of wheat and eggplant roots, causing browning and collapse of the epidermis and cessation of growth. After detaching itself from the feeding site, the nematode left a small tube attached to the cell wall. In pathogenicity trials, two good hosts — eggplant and cotton — showed different responses: growth of eggplant was drastically inhibited at an inoculation level of 200 nematodes per plant, while populations of up to 800 nematodes per plant stimulated growth of cotton roots and tops. Infested eggplant seedlings exhibited a severely thinned and shortened lateral root system and stunted tops. © 1975, Brill. All rights reserved.
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DOI :
10.1163/187529275X00365
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
20989
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:40
Scientific Publication
Pathogenicity and Population Increase of Paratricho-Dorus Minor as Influenced by Some Environmental Factors
21
Schilt, H.G., Philips-Duphar GmbH. Bosenheimer Str. 231, Bad Kreuznach, Bundesrepublik Deutschland, Germany
Cohn, E., Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Pathogenicity and Population Increase of Paratricho-Dorus Minor as Influenced by Some Environmental Factors
The relative importance of the effect of soil temperature, soil texture and host species on the increase and the pathogenicity of a population of Paratrichodorus minor from Israel was studied. Populations increased fastest at 26° C, followed by 30°, 22° and 18°, approaching the host-specific equilibrium density after 90 days. In the presence of a host, populations thrived better in sand and sandy loam than in clay, but were obviously sensitive to moisture fluctuations. Host species affected population increase more than soil temperatures and soil types. In fallow, survival was better in clay and sandy loam than in sand. In vitro, P. minor fed vigorously on epidermal cells in the elongation and meristematic zone of wheat and eggplant roots, causing browning and collapse of the epidermis and cessation of growth. After detaching itself from the feeding site, the nematode left a small tube attached to the cell wall. In pathogenicity trials, two good hosts — eggplant and cotton — showed different responses: growth of eggplant was drastically inhibited at an inoculation level of 200 nematodes per plant, while populations of up to 800 nematodes per plant stimulated growth of cotton roots and tops. Infested eggplant seedlings exhibited a severely thinned and shortened lateral root system and stunted tops. © 1975, Brill. All rights reserved.
Scientific Publication
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