Role of<i>Pratylenchus penetrans</i>in the Potato Early Dying Disease of Russet Burbank Potato

MacGuidwin, A. E.; Rouse, D. I.

doi:10.1094/phyto-80-1077

Cited by 62 publications

(35 citation statements)

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“…The nematode populations remained below control levels for the 3 years of this study. The reduction in nematode populations could have contributed to the lower incidence of verticillium wilt, as nematodes are part of the early dying disease complex (22,27,33).…”

Section: Discussionmentioning

confidence: 99%

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Reduction of potato scab, verticillium wilt, and nematodes by soymeal and meat and bone meal in two Ontario potato fields

Lazarovits

Conn

Potter

1999

Canadian Journal of Plant Pathology

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Soymeal (SM) and meat and bone meal (MBM) were incorporated into soil to a depth of 15 cm at a rate of 37 t/ha at two commercial potato (Solatium tuberosum) fields in Ontario in the spring of 1996. The incidence of verticillium wilt and potato scab, the population of plant parasitic nematodes, and the soil chemistry and microbiology were monitored in three subsequent crops of potatoes in 1996-1998. Verticillium dahliae microsclerotia (MS) were buried in the soil immediately after incorporation of the amendments, both in the field and in a concurrent laboratory assay using soil from the field placed in test tubes, and the viability of the MS was determined 4 weeks later. Both treatments reduced the incidence of verticillium wilt, potato scab, and the nematode population to near zero levels in 1996. Reduced disease levels were still evident in the 1997 crop, but by 1998, disease levels were equal to or higher than those in the control treatments. Nematode numbers remained below control levels for the 3 years of this study. Yields were significantly reduced in treated plots in the first year but because tubers were scab free, the marketable yield did not differ from the control plots. In the second year, total yields were higher in treated plots but the increase was significant from the control only with MBM at one site. The overall population of soil bacteria increased 100-fold immediately after the addition of SM and MBM and returned to control levels by the end of the first season. There was an initial elevation of soil pH from 6.0 to 8.5 at both sites and a corresponding increase in ammonia levels 2 weeks after incorporation. Nitrite and nitrate levels were also higher than those of the control treatments after 4 weeks. SM and MBM reduced MS viability by 72-100% of the control treatments at both sites, which was positively correlated with the incidence of verticillium wilt of the crop in the first season (r = 0.9, P < 0.0001). Thus, the V. dahliae MS bioassay, in conjunction with the laboratory assay, predicted the efficacy of these amendments for reducing verticillium will in the field.Résumé : Au printemps de 1996, du tourteau de soja (TS) ainsi que de la farine de viande et d'os (FVO) ont été incorporés au sol a une profondeur de 15 cm et a un taux de 37 t/ha dans deux champs de pommes de terre {Solarium tuberosum) de l'Ontario. Les frequences de la verticilliose et de la gale commune de la pomme de terre, la population de nematodes phytoparasites, ainsi que la chimie et la microbiologie du sol ont été analysées lors de trois cultures subséquentes de pommes de terre de 1996 a 1998. Des microsclérotes du Verticillium dahliae (MS) ont été enfouis dans Ie sol immédiatement après 1'incorporation d'amendements, tant au champ que dans un essai parallèle en laboratoire oü du sol des champs fut place en éprouvette et la viabilité des MS déterminée 4 semaines plus tard. En 1996, les deux traitements ont presque éliminé la verticilliose, la gale commune et la population de nematodes. Cette diminution de la maladie étai...

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Section: Discussionmentioning

confidence: 99%

“…Verticillium wilt is caused by the fungal pathogen Verticillium dahliae Kleb. in association with various nematode species (22,27,33). Infection is initiated from microsclerotia (MS), which overwinter in soil or in infected plant debris.…”

Section: Introductionmentioning

confidence: 99%

Reduction of potato scab, verticillium wilt, and nematodes by soymeal and meat and bone meal in two Ontario potato fields

Lazarovits

Conn

Potter

1999

Canadian Journal of Plant Pathology

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“…However, potato yield reductions are not necessarily correlated with the severity of above-ground disease symptoms and can be influenced by soil and environmental conditions (Nachmias and Krikun, 1985;Rowe et al, 1985;Powelson and Rowe, 1993). It has also been demonstrated that yield reductions caused by Verticillium wilt can be especially severe in irrigated fields, especially in hot climates, and if potato crops experience extended periods of heat stress or high rates of evapotranspiration or damage by the root lesion nematode, P. penetrans (Ewing, 1981;Rowe et al, 1985;Francl et al, 1990;MacGuidwin and Rouse, 1990;Botseas and Rowe, 1994;Berlanger and Powelson, 2005). In some potato varieties, the discoloration of the vascular tissue in tubers results in tuber quality reduction (Berlanger and Powelson, 2005).…”

Section: Potential Pest Effectsmentioning

confidence: 99%

Scientific opinion on the pest categorisation of Verticillium dahliae Kleb

Rossi¹

2014

EFS2

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The European Commission requested the EFSA Panel on Plant Health to perform a pest categorisation of Verticillium dahliae Kleb., the fungal pathogen responsible for many Verticillium wilt diseases. V. dahliae is a single taxonomic entity, and sensitive and reliable methods exist for its detection and identification. V. dahliae is a highly polyphagous pathogen, affecting, overall, 400 cultivated and non-cultivated plant species. It is a hostadapted rather than a host-specific pathogen and has the ability to continuously widen its host range and develop races/pathotypes that can overcome host resistance or be more virulent on known hosts and host cultivars. V. dahliae is a vascular pathogen that causes wilt and plant death, thus impairing the growth and shortening the lifespan of its hosts. The pathogen is currently present in most parts of the risk assessment area, where yield reductions up to 50 % or more have been reported on some high value crops, including cotton, olive, potato, strawberry and ornamentals. There are no obvious eco-climatic factors limiting its potential establishment and spread in the non-infested part of the risk assessment area, where hosts are present. Once established, the pathogen can spread by both natural and human-assisted means. Movement of infected host plants for planting, especially asymptomatic plants, and seeds can introduce the pathogen (and its highly virulent races/pathotypes) into new areas. Application of integrated management strategies combined with disease risk assessment (assessment of the available soil-borne inoculum, determination of races/pathotypes present in the site, field cropping history) may reduce the impacts of Verticillium wilt in the risk assessment area, but it cannot eliminate the pathogen. V. dahliae is listed in Annex IIAII of Directive 2000/29/EC and, despite its wide host range, it is regulated only on Humulus lupulus (hop), for which the pathogen is considered of minor importance compared to V. nonalfalfae.

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“…It is further complicated when the crop is grown under different production environments or where there are several pests present. In natural field situations plants are Downloaded by [University of Prince Edward Island] at 20:32 20 November 2014 rarely exposed to a single stress and some disease syndromes occur only when more than one pest is present (Francl et al 1987;MacGuidwin & Rouse 1990). Under such scenarios it is difficult to assess percent disease severity visually for a specific pest.…”

Section: Introductionmentioning

confidence: 99%

Effect of early blight(Alternaria solani)on healthy area duration and healthy area absorption of potatoes(Solanum tuberosum)grown in Canterbury New Zealand with different nitrogen application and stress from potato cyst nematode(Globodera rostochiensis)

Shah

McKenzie

Gaunt

et al. 2004

New Zealand Journal of Crop and Horticultural Science

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Role ofPratylenchus penetransin the Potato Early Dying Disease of Russet Burbank Potato

Cited by 62 publications

References 0 publications

Reduction of potato scab, verticillium wilt, and nematodes by soymeal and meat and bone meal in two Ontario potato fields

Reduction of potato scab, verticillium wilt, and nematodes by soymeal and meat and bone meal in two Ontario potato fields

Scientific opinion on the pest categorisation of Verticillium dahliae Kleb

Effect of early blight(Alternaria solani)on healthy area duration and healthy area absorption of potatoes(Solanum tuberosum)grown in Canterbury New Zealand with different nitrogen application and stress from potato cyst nematode(Globodera rostochiensis)

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