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American Potato Journal

, Volume 58, Issue 11, pp 585–592 | Cite as

Effect of temperature on differential persistence and insect transmission ofErwinia carotovora var.atroseptica andErwinia carotovora var.carotovora

  • J. W. Kloepper
  • M. D. Harrison
  • J. W. Brewer
Article

Abstract

Adult fruit flies (Drosophila melanogaster Meig.) transmittedErwinia carotovora var.carotovora (Jones) Dye (ECC) andErwinia carotovora var.atroseptica (van Hall) Dye (Eca) from vegetative material inoculated with equal proportions ofEcc andEca to uninoculated potato plants and from inoculated potato plants to sterile vegetative material at 15° and 27°C. The insects transmittedEcc andEca with approximately equal frequencies over an 18 hr period at 15°C. At 27°C the proportion ofEcc transmitted was significantly greater thanEca. At 27°C moreEcc thanEca was present in the inoculated vegetative material and potato stems, on fruit flies visiting these sites, and in injured potato tissues to which flies transmitted the bacteria. Results indicate that temperature is important in determining success ofEcc andEca transmission by insects and the relative persistence of the two organisms in plant tissues after transmission.

Key Words

potato blackleg insects vectors recontamination epidemiology 

Resumen

Moscas de fruta (Drosophila melanogaster Meig.) transmitieronErwinia carotovora var.carotovora (Jones) Dye (Ecc) yErwinia carotovora var.atroseptica (van Hall) Dye (Eca) de material vegetativo inoculado con iguales proporciones deEcc yEca a plantas de papa no inoculadas y de plantas de papa inoculadas a material vegetativo steril a temperaturas de 15° y 27°C. La trasmisión deEcc yEca por dichos insectos se hizo aproximadamente con igual frecuencia sobre un período de 18 horas a 15°C. A 27°C la trasmisión deEcc fue significativamente mayor queEca. A esta misma temperatura (27°C), se encontró másEcc queEca en el material vegetativo inoculado y en los tallos de papas; así como en moscas que visitaron los sitios inoculados y en los tejidos de papa dañados a los cuales ias moscas trasmitieron la bacteria. Los resultados indican que la temperatura es importante para determinar el exito de la trasmisión deEcc yEca a través de los insectos; asimismo para la persistencia de los dos organismos bacterianos en los tejidos de las plantas después de la trasmisión.

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Copyright information

© Springer 1981

Authors and Affiliations

  • J. W. Kloepper
    • 1
  • M. D. Harrison
    • 1
  • J. W. Brewer
    • 2
  1. 1.Department of Botany and Plant PathologyColorado State UniversityFort Collins
  2. 2.Department of Zoology and EntomologyColorado State UniversityFort Collins

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