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The Potato Tuber Disease Occurrence as Affected by Conventional and Organic Farming Systems

Tein, Berit; Kauer, Karin; Runno-Paurson, Eve; Eremeev, Viacheslav; Luik, Anne; Selge, Are and Loit, Evelin (2015) The Potato Tuber Disease Occurrence as Affected by Conventional and Organic Farming Systems. American Journal of Potato Research, 93, pp. 1-11.

[thumbnail of Tein et al 2015.pdf] PDF - Accepted Version - English
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A study was conducted which aimed to investigate the effect of farming systems (FS) (four conventional with increasing mineral N fertilizer amounts 0–150 kg of N ha−1) vs. two organic with catch crops (CC) and cattle manure (CC+M)) under the same five crop rotation system on the occurrence of tuber diseases such as common scab (Streptomyces spp.), silver scurf Helminthosporium solani), dry rot (Fusarium spp.), and soft rot (Pectobacterium spp.). As the average of the first rotation years 2009–2011, the FS had a significant effect on the occurrence of silver scurf, dry rot and common scab (surface cover <30 %). The organic systems had significantly more tubers (around 39 %) infected with common scab (surface cover 4–15 %) than in conventional systems (around 25 %). However, when the surface lesion severity increased (surface cover 16–30 %) then differences occurred only between organic systems (in system Organic CC 4.1 % and in system Organic CC+M 13.1 % of tubers infected). The Organic CC system had significantly fewer tubers infected with silver scurf compared to all conventional farming systems (10.5 % vs 17.8–23.4 %). During the first and after the second disease measurement there were less tubers infected with dry rot in Organic CC (0.8–0.9 %) and conventional N high (0.5–1.4 %) systems compared to N low (1.8–3.0 % of tubers infected) system. Soft rot infections were not influenced by farming systems. Thus we conclude that it is possible to influence the occurrence of some tuber diseases with FS.

EPrint Type:Journal paper
Keywords:N fertilization Catch crops Streptomyces spp. Helminthosporium solani Fusarium spp. Pectobacterium spp.
Subjects: Crop husbandry > Composting and manuring
Crop husbandry > Crop health, quality, protection
Research affiliation: Estonia > Estonian University of Life Sciences
European Union > CORE Organic II > TILMAN-ORG
European Union > CORE Organic II
Deposited By: Pehme, Sirli
ID Code:29423
Deposited On:02 Nov 2015 08:25
Last Modified:02 Nov 2015 08:25
Document Language:English
Refereed:Peer-reviewed and accepted

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