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Black spot diseases in carrot Organic Eprints
Voorrips, Roeland E.; Zijlstra, Sierd; Köhl, Jürgen; Kastelein, Pieter.
An important problem in organic carrot production in the Netherlands is the occurrence of black spots during storage. Several different fungal pathogens cause similar symptoms, which are collectively known as black spot diseases. We identified Alternaria radicina, A. dauci and Rhexocercosporidium carotae (syn. Acrothecium carotae) as the most prevalent black spot pathogens. We developed laboratory test methods for resistance to A. radicina and R. carotae, and assessed resistance in a collection of cultivated varieties and more exotic material.
Tipo: Conference paper, poster, etc.
Ano: 2006 URL: http://orgprints.org/7314/1/Black_spot_diseases_in_carrot.pdf
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Identification of measures for prevention of black spots in organically produced stored carrots Organic Eprints
Koehl, Juergen; Kastelein, Pieter; Elderson, Janneke; Blok, Wim J..
In the Netherlands winter carrot for the fresh market is a cash crop for many organic growers of field vegetables. In the last few years blackish spots have been observed during storage of carrot roots. An inventory was carried out in 2001/2002 and 2002/2003 including in total 42 carrot lots from 22 growers. Statistical analysis was performed by multiple regression analysis to identify factors and variables that best explained the occurrence of black spots on stored carrots. Rhexocercosporidium carotae was the dominating pathogen in black spots of carrots harvested in 2001. From carrots harvested in 2002, Alternaria radicina was isolated most frequently, followed by A. dauci and R. carotae. Multiple regression analysis indicated that the occurrence of R....
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection.
Ano: 2005 URL: http://orgprints.org/4305/3/K%C3%B6hl_etal_4p_revised%2Ded.doc
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