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Suppressive effect of Azotobacter chroococcum on Rhizoctonia solani infestation of potatoes

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Abstract

Isolates ofAzotobacter chroococcum were found to be promising for the control of infestation of potato plants withRhizoctonia solani. Inoculation with an isolate ofVerticillium biguttatum in combination with isolates ofA. chroococcum effectively protected sprouts, stems and stolons against infestation withR. solani. The effect of inoculation varied with soil temperature.

No sclerotia were formed on potatoes harvested from soil in pots inoculated with isolates ofA. chroococcum plusV. biguttatum under glasshouse conditions; the yield increased significantly over the control.

Samenvatting

Enkele isolaten vanAzotobacter chroococcum bleken sterk antagonistisch ten opzichte vanRhizoctonia solani en leken goed bruikbaar voor een biologische bestrijding van deze ziekteverwekker van de aardappel.

Beënting van de grond metVerticillium biguttatum enA. chroococcum gaf — in potproeven — een effective bescherming van spruiten, stengels en stolonen tegen aantasting doorR. solani.

De vorming van sclerotiën bleef achterwege op knollen die gevormd waren in grond die was beënt metA. chroococcum plusV. biguttatum. De opbrengst uit behandelde grond was hoger dan die uit onbehandelde.

De effectiviteit van de behandeling is afhankelijk van de temperatuur.

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Author notes

  1. Sudhir U. Meshram (Guest worker)

    Present address: Division of Microbiology, IARI, 110012, New Delhi, India

Authors and Affiliations

  1. Institute for Soil Fertility, P.O. Box 30003, 9750 RA, Haren (Gr.), the Netherlands

    Sudhir U. Meshram (Guest worker)

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  1. Sudhir U. Meshram
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Meshram, S.U. Suppressive effect of Azotobacter chroococcum on Rhizoctonia solani infestation of potatoes. Netherlands Journal of Plant Pathology 90, 127–132 (1984). https://doi.org/10.1007/BF01994519

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  • DOI: https://doi.org/10.1007/BF01994519

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