Seed Treatment and Fungicide Applications to Control Stem Blight on Potato

Keil, Sven; Zellner, Michael; Benker, Marianne

doi:10.17660/actahortic.2009.834.24

Cited by 1 publication

(3 citation statements)

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“…In order to be able to compare the effectiveness of certain fungicide measurements or seed treatments (Keil et al 2009, Benker andZellner 2008) it is crucial to get as many primary stem infections as possible. If less than 3% of the plants show (Hirst 1955).…”

Section: Discussionmentioning

confidence: 99%

“…Potato varieties 'Agria' and 'Quarta' were used from 2005-2007and 'Agria' and 'Laura' in 2008and 2009. These combinations of potato varieties were selected so the test plants could be differentiated phenotypically.…”

Section: Plant Materialsmentioning

confidence: 99%

“…Nevertheless, these few infection sites are the origin of the epidemic within the standing crop. A prerequisite for successful study of primary infection as performed by Keil et al (2009) is a consistent and uniform rate of infection of the seed tubers. A low rate of stem blight reduces the informative value of an experiment.…”

Section: Introductionmentioning

confidence: 99%

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Double Setting of Potato Seed Tubers as a New Approach to Research Primary Stem Blight (Phytophthora infestans (Mont.) de Bary)

Keil

Benker²,

Zellner

2009

Am. J. Pot Res

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The double setting of two seed tubers is introduced as a new method for research on primary stem blight of potato, Solanum tuberosum L. caused by Phytophthora infestans (Mont.) de Bary). The principal focus of this experimental layout is the planting of a healthy seed tuber adjacent to an inoculated one, termed double setting. The infected tuber serves as a source of inoculum, enabling the disease to spread to the neighboring plant, where stem infections occur. The new method was compared to the common procedure of direct inoculation of tubers. The rate of emergence using double setting was significantly higher compared to direct inoculation. Additionally, stem blight was more intense and generally occurred earlier. Direct inoculation proved to be less suitable for research where the occurrence of higher percentages of stem blight symptoms is necessary. Further more, the double setting method generally permits insight into the spread of the disease from latent infected tubers to healthy ones under the natural conditions within the potato hill.Resumen Se presenta el duplicado de dos tubérculos semilla como nuevo método de investigación en tizón de tallo primario de papa, Solanum tuberosum L., causado por Phytophthora infestans (Mont.) de Bary. El enfoque principal de este planteamiento experimental es la siembra de un tubérculo semilla sano junto a otro inoculado, que le llamamos duplicado. El tubérculo infectado sirve como fuente de inoculo, permitiendo que la enfermedad se disperse a la planta vecina, donde se presenta la infección del tallo. El nuevo método se comparó con el procedimiento común de inoculación directa de los tubérculos. El nivel de emergencia del duplicado fue significativamente mas alto comparado con la inoculación directa. Además, el tizón del tallo fue mas intenso y generalmente se presentó más temprano. Se evidenció que la inoculación directa fue menos deseable para investigación cuando se necesita la incidencia de porcentajes mayores de síntomas de tizón del tallo. Aún más, el método del duplicado generalmente permite discernir sobre la dispersión de la enfermedad de tubérculos con infección latente a los sanos bajo las condiciones naturales al interior del surco.

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Section: Discussionmentioning

confidence: 99%

Section: Plant Materialsmentioning

confidence: 99%