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Spore contamination of Tilletia tritici in seed lots as affected by field disease incidence

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Borgen, Anders and Kristensen, Lars (2010) Spore contamination of Tilletia tritici in seed lots as affected by field disease incidence. In: Gaudet, Dennis (Ed.) Proceedings of the XVIth Biennial Workshop on the Smuts and Bunts.

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Online at: http://www.agrologica.dk/publikationer/contamination.lethbridge2010.pdf

Summary

Seed lots normally become contaminated by spores of the seed borne common bunt (Tilletia tritici) during harvest of fields with infected plants. To demonstrate the relation between the number of infected plants in the field and the resulting number of spores in the harvested seed lot, a fixed number of infected tillers were placed in uncontaminated wheat fields. Two field experiments show
that the number of spores in the seed lot is proportional to the number of infected plants in the field. Only 3% of the spores from the infected plants in the field end up in the seed lot after harvest with a combine harvester. However, only few spores in a seed lot is enough to establish infection in the next year field, and with a threshold of 10 spores/g seed which is the current threshold for untreated seed in Denmark, less than 1 infected tiller per 1000 m2 can be accepted in a field aimed for propagation.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Subjects: Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Crop health, quality, protection
Research affiliation: Denmark > Agrologica
Deposited By: Borgen, Ph.D. Anders
ID Code:22161
Deposited On:16 Jan 2013 12:31
Last Modified:16 Jan 2013 12:31
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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