Influence of Continuous Cropping of Several Potato Clones on the Epidemiology of Verticillium Wilt of Potato

Davis, James R.; Pavek, J. J.; Corsini, D. L.; Sorensen, L. H.; Schneider, A. T.; Everson, D. O.; Westermann, D. T.; Huisman, O. C.

doi:10.1094/phyto-84-207

Cited by 47 publications

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“…In addition to resistant cultivars (Mohan et al 1990), and the management of crop nutrition (Davis et al 1994a), the use of green manures can also be an effective tool for the management of this disease (Davis et al 1994a(Davis et al , b, 1996Wiggins and Kinkel 2005). Green manure crops that we have found to provide disease suppression have included barley, corn, rape, oats, rye, sudangrass and wheat, but of these crops, sudangrass has shown the highest potato yield response for U.S. 1 tubers and tubers >280 g (Davis et al 1994b). The benefits of sudangrass cannot be directly explained by a reduction in soil populations of V. dahliae, but can be explained by reduced infections by V.…”

Section: Introductionmentioning

confidence: 99%

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Ecological Relationships of Verticillium Wilt Suppression of Potato by Green Manures

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Studies show that once a suppressive effect has been established, a green manure treatment for a single season is sufficient to either maintain or to re-establish the control of Verticillium wilt of potato. Verticillium wilt, caused by Verticillium dahliae Kleb., was controlled on the first years of Russet Burbank potato cropping following 2-3 successive years of green manure treatments. Following this control, yields were increased with the first year of potato cropping, but were reduced during the second consecutive year of cropping with potato. In the second year of continuous cropping with Russet Burbank, total yields were reduced by 10% and U.S. #1 tubers by 40%, and these yield reductions were accompanied by increased soil populations of V. dahliae by >5-fold. Yet, with a single season of an earlier-used green manure treatment (e.g. Austrian winter pea, sudangrass, Dwarf Essex rape, Bridger rape, oats, rye, or sweet corn), Verticillium wilt was again controlled and yields of Russet Burbank were increased to higher levels or to levels that were equivalent to those initially observed following either 2 or 3 successive seasons of green manure treatment. Green manures also demonstrated significant effects on microbial activities, which were inversely related to the incidence of Verticillium wilt. More specific effects on microbial activity and soilborne ecology were shown with increased populations of Fusarium spp. Verticillium wilt was negatively correlated with infections of potato feeder roots and stem-ends of potato tubers by F. equiseti. Exemplifying the effect of a green manure on fungal ecology, sudangrass treatments were shown to have lasting effects on Fusarium avenaceum populations with quantitative changes that extended 5 years beyond the time of soil incorporation with sudangrass.Resumen Los estudios demuestran que una vez que se ha establecido el efecto supresivo, es suficiente un tratamiento con abono verde por un ciclo de cultivo ya sea para mantener o re-establecer el control del marchitamiento por Verticillium en papa. El marchitamiento por verticillium, causado por Verticillium dahliae Kleb, fue controlado en los primeros años del cultivo de papa Russet Burbank siguiendo dos o tres años sucesivos de tratamientos con abono verde. Siguiendo este control, se aumentaron los rendimientos en el primer año del cultivo de la papa, pero se reducía durante el segundo año consecutivo de cultivo con papa. En el segundo año continuo del cultivo con Russet Burbank , se redujo el rendimiento total en un 10% y los tubérculos U.S. # 1 en 40%, y estas reducciones se acompañaron por el aumento en las poblaciones de V. dahliae en más de cinco veces. Pero con un tratamiento temprano de abono verde en un ciclo (por ejemplo, chícharo Australiano de invierno, pasto sudán, colza enana Essex, colza Bridger, avena, centeno, o maíz dulce), se controlaba nuevamente el marchitamiento por Verticillium y se aumentaban los rendimientos de Russet Burbank a niveles más altos o equivalentes a aquellos observados inicialmente sig...

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Section: Introductionmentioning

confidence: 99%

“…Disease reduction with green manures has been highly correlated with both nonspecific microbial activities and major changes in microbial populations as evidenced by increases of nonpathogenic Fusarium spp. (Davis et al 1994b(Davis et al , 1996. However, F. equiseti and F. avenaceum are minor pathogens of wheat and barley.…”

Section: Introductionmentioning

confidence: 99%

Ecological Relationships of Verticillium Wilt Suppression of Potato by Green Manures

et al. 2010

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“…However, selection for tolerance is an unacceptable breeding strategy because it results in the accumulation of fungal propagules in the soil. Davis et al (1994) have demonstrated that wilt incidence and stem colonization increase dramatically following continuously cropping of potato clones unless they are highly resistant to infection.…”

Section: Introductionmentioning

confidence: 99%

Identification of potato interspecific hybrids resistant toVerticillium wilt and determination of criteria for resistance assessment

Jansky

Rouse

2000

Potato Res

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SummaryVerticillianl dahliae causes potato (Solarium tuberosam) early dying disease. Interspecific hybrids containing S. tuberosunl, S. berthaaltii, S. bukasovii, S. chacoense, S. gourlayi, S. sparsipilum and S. tarijense were identifed with resistance to V. dahliae. Clones were grown in replicated trials for three years in a plot containing approximately 50 colony forming units (cfu) V. dahliae per g soil. Clones were evaluated for vine maturity, early dying symptoms and stem colonization. Five resistant 2x clones were identified with early maturity and low levels of stem colonization. A single maturity score and one disease score, each obtained in mid-August, were sufficient to distinguish among clones. An effective threshold level for considering a stem to be infected was determined to be 25 cfu/100 ial sap. Early dying symptoms did not correlate strongly with stem colonization. Numerous stems must be sampled when making resistance assessments. The average cfu/100 IJI sap correlated strongly with the number of infected stems.

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“…Treatment of soil with metarri-sodium and long rotations are the only two practical approaches to reduce V. dahliae inoculum density in the state of Idaho. New potato varieties that are resistant to V. dahliae have been recently developed (Davis et al 1994a;1994b;Mohan et al 1992). These new varieties along with proper fertilization, crop rotations and irrigation management are also used to control the pathogen to some extent (lames et al 1994;Davis et al 1994b).…”

Section: Introductionmentioning

confidence: 99%

“…New potato varieties that are resistant to V. dahliae have been recently developed (Davis et al 1994a;1994b;Mohan et al 1992). These new varieties along with proper fertilization, crop rotations and irrigation management are also used to control the pathogen to some extent (lames et al 1994;Davis et al 1994b). Since potato varieties respond to cultural management, research has focused on alternative cultural methods to control V. dahliae.…”

Section: Introductionmentioning

confidence: 99%

Compost Amendments DecreaseVerticillium dahliaeInfection on Potato

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Strausbaugh

Sojka

2005

Compost Science & Utilization

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Influence of Continuous Cropping of Several Potato Clones on the Epidemiology of Verticillium Wilt of Potato

Cited by 47 publications

References 0 publications

Ecological Relationships of Verticillium Wilt Suppression of Potato by Green Manures

Ecological Relationships of Verticillium Wilt Suppression of Potato by Green Manures

Identification of potato interspecific hybrids resistant toVerticillium wilt and determination of criteria for resistance assessment

Compost Amendments DecreaseVerticillium dahliaeInfection on Potato

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