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How to set up an on-farm cultivar trial to score for leaf blight in carrots? (Liveseed practice abstract)

{Tool} How to set up an on-farm cultivar trial to score for leaf blight in carrots? (Liveseed practice abstract). Creator(s): Gutzen, Kaja. Issuing Organisation(s): IFOAM Organics Europe. Liveseed Practice Abstract, no. 9. (2020)

[thumbnail of How to set up an on-farm cultivar trial to score for leaf blight in carrots?] PDF - English (How to set up an on-farm cultivar trial to score for leaf blight in carrots?)
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Document available online at: https://www.liveseed.eu/wp-content/uploads/2020/11/PA9_How-to-set-up-an-on-farm-cultivar-trial-to-score-for-leaf-blight-in-carrots.pdf


Summary

Practical recommendations
Other strategies include:
• Use of vigorous and decontaminated seeds
• Avoid favourable micro climate through wider row spacing and planting on raised ridges
• Crop rotation,with at least 2-3 carrot-free years in crop rotation
• Use of organic fertilisation and irrigation if necessary, to reduce plant stress and promote foliage development
• Harvesting on time, to reduce crop loss
• Ploughing of crop debris to avoid survival of inoculum


EPrint Type:Practice tool
What problem does the tool address?:In organic production, attack by carrot leaf blights (Fig. 1), caused by fungal (Alternaria dauci,Cercospora carotae)or bacterial pathogens (Xanthomonas campestris pv. carotae), can result in yield loss. The choice of resistant varieties is crucial; however, commercial varieties differ greatly in their susceptibilities. Additionally, official variety testing does not test for the suitability for organic growing conditions, and often takes place under ideal conditions on a limited number of locations.
What solution does the tool offer?:Organic farmers can set up a simple, on-farm cultivar trial to assess the varieties’ susceptibility to leaf blight. For this, different varieties are cultivated in 2-3 strips, distributed in the trial field, to minimize the influence of heterogeneous soil conditions. A variety with a well-known
tolerance level serves as a reference. Farmers can use their own machinery for cultivation. Throughout the growing season, scoring of disease symptoms (Fig. 2) should be conducted. Symptoms include:
• Spots at the margin of leaves
• Lesions on petioles and stems
• Curling of leaves
• Defoliation
Country:Belgium
Type of Practice Tool:Practice abstracts
Keywords:breeding
Agrovoc keywords:
Language
Value
URI
English
breeding
http://aims.fao.org/aos/agrovoc/c_49902
Subjects: Crop husbandry > Breeding, genetics and propagation
Research affiliation: European Union > Horizon 2020 > Liveseed
European Union > Horizon 2020 > Liveseed > Liveseed tools
Hungary > Hungarian Research Institute of Organic Agriculture
International Organizations > International Federation of Organic Agriculture Movements IFOAM > IFOAM EU Group
H2020 or FP7 Grant Agreement Number:727230
Related Links:https://organic-farmknowledge.org/tool/38989
Project ID:oknet
Deposited By: Ortolani, Dr. Livia
ID Code:38989
Deposited On:12 Jul 2021 13:17
Last Modified:20 Jul 2021 13:06
Document Language:English
Status:Published

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