Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 525412
Title Onderzoekingen over Ophiobolus graminis Sacc. en Ophiobolus herpotrichus (Fr.) Sacc. en over de door deze fungi veroorzaakte ziekten van Triticum vulgare Vill. en andere Gramineae
Author(s) Laar, J.H.J. van de
Source University. Promotor(en): H.M. Quanjer. - Wageningen : Veenman - 146
Publication type Dissertation, internally prepared
Publication year 1931
Keyword(s) plantenziekteverwekkende schimmels - graansoorten - voedselgewassen - diaporthales - ophiobolus - gaeumannomyces graminis - cum laude - plant pathogenic fungi - cereals - food crops
Categories Plant Pathogenic Fungi
Abstract Due to the increasing importance of the wheat disease 'tarwehalmdoder' in the Netherlands, research was started on its occurrence and cause. An extensive literature review proved the identity of 'tarwehalmdoder' with take-all or whiteheads, which were caused by 0. graminis. The symptoms of the disease were root rot, decreased growth with drying of the leaves, blackening of the stem base and premature ripening.
Other fungi found on the stubble of Ophiobolus-diseased plants were described.

Ascosporous isolates of O. graminis and O. herpotrichus in pure culture were used in artificial inoculations. Inoculation with 0. graminis resulted in whiteheads. Only about half the isolates of O. herpotrichus were virulent on wheat and barley causing death of seedlings. This symptom was different from foot-rot and root-rot.

The occurrence of O. graminis on many Gramineae was reported. Resistance did not occur in existing wheat varieties. Environmental factors influenced the severity of the disease. Good crop rotation and cultural practices could limit economic losses.
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