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Reduction of spore spread of common bunt (Tilletia tritici) via combining equipment

Kristensen, Lars and Borgen, Anders (2001) Reduction of spore spread of common bunt (Tilletia tritici) via combining equipment. Biological Agriculture and Horticulture, 19, pp. 9-18.

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The disease common bunt (Tilletia tritici syn. T.caries) has become a more frequent problem in Europe during the last 15 year. In organic farming, common bunt causes serious problems for seed producers, and many seed lots are discarded due to contamination with Tilletia tritici. Due to the biology of Tilletia tritici, with spores loosely attached to the surface of the grain, there is a risk that spores can be disseminated via grain handling equipment, including combine harvesters. Preventive efforts should focus on the role of grain handling equipment, and how the fungus life cycle can be broken. We have investigated the dissemination of spores via the combiner after harvesting infected fields. We conducted six trials over three years, counting the number of spores in up to seven emptyings of the combiner. Up to 4 emptyings with non-contaminated grains are needed in order to achieve an acceptable low level of contamination. Using Denmark as a case, we discuss several important factors influencing disease spread via harvest equipment. It is concluded that one easy preventive strategy is to avoid using the first 4 emptyings of the combiner. This method should always be combined with analysis of seeds for spore load.

EPrint Type:Journal paper
Keywords:seed health, harvest equipment, stinking smut
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Research affiliation: Denmark > DARCOF II (2000-2005) > VI.1 (ORGSEED) Healthy seed for organic production of cereals and legumes
Related Links:http://www.agrologica.dk/pub-list.htm
Deposited By: Borgen, Ph.D. Anders
ID Code:1124
Deposited On:01 Sep 2004
Last Modified:12 Apr 2010 07:27
Document Language:English
Refereed:Peer-reviewed and accepted

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