The effect ofCorynebacterium sepedonicum on symptoms and yield of four potato cultivars

Sletten, A.

doi:10.1007/bf02357567

Cited by 22 publications

(16 citation statements)

References 7 publications

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“…However, the high potential economic impact of Cms for the potato industry is evident from the reaction of potato cultivars to artificial inoculation with the bacterium. Inoculating potato plants by Cms in a field experiment reduced yield up to 51% (Bonde et al 1942;Nelson & Torfason 1974;Nelson & Howard 1982;Sletten 1985;Manzer & McKenzie 1988). Nevertheless, such heavy losses are unusual in practice.…”

Section: Economic Importance Of Cms Remains Still Controversialmentioning

confidence: 99%

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

Kůdela¹

2007

Plant Prot. Sci.

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Kůdela V. (2007): History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures. Plant Protect. Sci., 43: 35-46.In the supposed or proven incidence of bacterial ring rot caused by Clavibacter michiganensis subsp. sepedonicus (Cms) in certified seed and commercial potatoes, five periods can be identified in the Czech Lands from 1910 to 2006: (i) high incidence of Cms in potato crops is claimed (about 1910-1929); (ii) very low incidence in certified potatoes and sporadic occurrence in commercial potatoes (about 1930-1985); (iii) increasing incidence of Cms in certified seed potatoes and its sporadic occurrence in commercial potatoes is assumed (about 1986-1997); (iv) a relatively high percentage of potato tuber samples proved to be infected by Cms, namely 1.14% in seed potatoes in 1998 and 4.13% in commercial potatoes in 1999 (1998-2004 period); (v) progressive decrease of Cms incidence to zero in seed potato samples and 0.19% in commercial samples in 2005, followed by a slight increase to 0.15% in seed potatoes and 0.23% in commercial potatoes in 2006 (2005-2006 period). Thus, up to 2006, Cms was and is not widely distributed in the CR and is actively and effectively controlled, mainly through the zero tolerance for ring rot bacterium in the seed potato certification program. In the CR, Cms has a relatively low capacity for damage and can hardly be considered as a pest of national economic importance. Strictly speaking, Cms does not fulfill the criteria for a quarantine organism. If, however, the quarantine status of Cms will be maintained, the severe post-entry measures against it should be relaxed.

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Section: Economic Importance Of Cms Remains Still Controversialmentioning

confidence: 99%

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

Kůdela¹

2007

Plant Prot. Sci.

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“…Frazzoli et al (1984) reported that Cms was not transmitted from infected plants to the tubers of healthy plants through their stolons. Sletten (1985) was not able to detect Cms in progeny tubers from control plots, despite their proximity to plots of infected plants.…”

Section: Discussionmentioning

confidence: 74%

Detection of Clavibacter michiganensis subsp. sepedonicus in daughter tubers of volunteer potato plants

Pánková¹,

Krejzar²,

Čepl³

et al. 2007

Plant Prot. Sci.

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Pánková I., Krejzar V., Čepl J., Kůdela V. (2007): Detection of Clavibacter michiganensis subsp. sepedonicus in daughter tubers of volunteer potato plants. Plant Protect. Sci., 43: 127-134.Daughter tubers of volunteer potatoes were tested for their ability to maintain Clavibacter michiganensis subsp. sepedonicus (Cms). In different areas of the CR, volunteer potatoes were searched for in crops grown in rotation with potatoes and where one or two years before Cms had been detected and identified in samples of harvested seed or commercial potatoes using the test scheme in accordance to EC Directive 93/85/EEC. During May and June of 2005 and 2006, emerging or emerged plants of volunteer potatoes were collected at nine locations of Bohemia and transplanted to the experimental field in the Diagnostic Service Laboratory at Šluknov-Kunratice in Northern Bohemia. The daughter tubers of these plants were harvested and stored at 6°C for 1 month and then at 22°C for 3 months for multiplication of Cms cells. Samples of the daughter tubers were divided into 215 partial samples and tested for the occurrence of Cms at five terms which differed in length of storage time. The DAS ELISA test was used to detect Cms in the tuber samples. Cms was detected in eight of the nine potato volunteer tuber samples from different locations. The presence of Cms in positively tested tuber samples was confirmed using a pathogenicity test on eggplants (Solanum melongena). The optimal time for the detection of the pathogen in the harvested daughter tubers was between 4 and 10 weeks of storage at 22°C.

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“…Während Dinesen (1987) (Dykstra 1941;Kakau et al 2004b;Manzer et al 1979;Sletten 1985). Dennoch belegen die in den hier vorgestellten Versuchen am Wiederaustrieb ermittelten hohen Übertragungs-raten von bis zu 60%, dass es durch den kontaminierten Krautschläger zu einer massiven Verschleppung des Erregers kommt.…”

Section: Diskussionunclassified

Besteht das Risiko der Verschleppung der Bakteriellen Ringfäule der Kartoffel durch den Krautschläger?

et al. 2004

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Zusammenfassung In den Jahren 2001 und 2002 wurden am Pflanzenschutzamt der Landwirtschaftskammer (LWK) Weser-Ems und am Institut für Pflanzenschutz der Bayerischen Landesanstalt für Landwirtschaft (LfL) in Freising jeweils zwei Feldversuche zur Übertragbarkeit der Bakteriellen Ringfäule der Kartoffel (Clavibacter michiganensis ssp. sepedonicus) mit dem Krautschläger durchgeführt. An der LWK Weser-Ems wurde für die Untersuchung der Fragestellung ein praxisnahes Modellsystem eingesetzt, in dem das Krautschlagen durch die Verwendung eines Rasentrimmers simuliert wurde und die Schnittflächen der Pflanzenstängel anschließend mit Bakteriensuspension besprüht wurden. Es wurden dabei zwei verschiedene Sorten (früh und spät) verwendet als auch die Wirkung einer zusätzlichen chemischen Behandlung zur Reiferegulation getestet. An der LfL in Freising wurden Parzellen mit infizierten Pflanzen für die Kontamination des Krautschlägers angelegt. Die Pflanzen auf diesen Parzellen wurden jeweils direkt vor dem Befahren der Parzellen mit gesunden Stauden geschlagen. Der Befall an Kraut (Wiederaustrieb) und Knollen der Stauden wurde mit der Polymerasekettenreaktion (PCR) und dem Immunfluoreszenz(IF)-Test ermittelt. In den Versuchen, in welchen der Krautschläger zum Einsatz kam, konnte vier Wochen nach dem Krautschlagen im Wiederaustrieb von 60% ursprünglich gesunder Stauden Befall festgestellt werden. Die Lebensfähigkeit und Virulenz der übertragenen Erreger bestätigte sich im Biotest. Trotz der massiven Erregerübertragung auf das Kraut konnte jedoch an keiner der insgesamt in allen Versuchen getesteten 450 Pflanzen ein Befall der Tochterknollen mit Bakterieller Ringfäule festgestellt werden. Da eine Abwanderung des übertragenen Erregers in die Knollen jedoch nicht vollständig ausgeschlossen werden kann, muss weiterhin zur Reinigung und Desinfektion des Krautschlägers vor jedem Einsatz geraten werden. Is haulm cutting a risk for spreading of bacterial ring rot of potato? Abstract In 2001 and 2002, two field trials were performed by the Plant Protection Service (PPS) of the Landwirtschaftskammer Weser-Ems in Oldenburg and the Institute for Plant Protection of the Bavarian State Research Center for Agriculture (LfL) in Freising respectively to examine the transmission of the bacterial ring rot pathogen of potato (Clavibacter michiganensis ssp. sepedonicus) by haulm cutting. In the experiment conducted by the PPS in Oldenburg a lawn-trimmer was used to simulate haulm cutting, before a bacterial suspension was sprayed on the ends of the cut haulms. Two cultivars (early and late) were tested and also the effect of an additional chemical measure for haulm destruction on the transmission of the pathogen was determined. In the trial performed at the LfL in Freising plots with infected plants for the contamination of the haulm cutter were treated immediately prior to plots with healthy plants. Infections of stems (re-growth) and tubers of the plants

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The effect ofCorynebacterium sepedonicum on symptoms and yield of four potato cultivars

Cited by 22 publications

References 7 publications

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

History of bacterial ring rot of potato in the Czech Lands and a proposal for relaxation of strict quarantine measures

Detection of Clavibacter michiganensis subsp. sepedonicus in daughter tubers of volunteer potato plants

Besteht das Risiko der Verschleppung der Bakteriellen Ringfäule der Kartoffel durch den Krautschläger?

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