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American Potato Journal

, Volume 56, Issue 1, pp 43–50 | Cite as

Changes in chlorpropham residues in stored potatoes

  • D. Corsini
  • G. Stallknecht
  • W. Sparks
Article

Abstract

Chlorpropham (CIPC)3 concentrations were measured in peel samples of tubers taken from large commercial potato storages and from test bins after aerosol application. Tuber samples were taken at different levels within the pile and at numerous sites near the surface. The minimum concentration of CIPC in the peel layer for complete inhibition of sprouting was estimated to be 20 ppm. Immediately after commercial application of CIPC, 99% of the sample sites had concentrations high enough to completely inhibit sprouting, and residues in the peel were generally highest in samples obtained from the surface and from the bottom of the pile. CIPC concentrations decreased during the storage season in nearly all sites tested. Storages differed in the rate at which CIPC was lost. Mean peel residues fell below the level necessary for sprout inhibition in some storages but not in others. The rate of CIPC loss increased at the same time that air movement to maintain the desired temperature increased. With the 20 ppm threshold level as a guide, it is possible to monitor commercial storages for sprout-inhibition status. Retreatment before peel residues drop below 20 ppm can extend sprout inhibition in storage.

Key words

Solatium tuberosum sprout-inhibition storage chlorpropham residue 

Resumen

Concentraciones de Clorprofan (CIPC) fueron medidas en muestras de tubérculos pelados tomadas de grandes almacenes comerciales de papa y de cajas de muestreo después de una aplicación aerosol.

Las muestras de tubérculos fueron tomadas de diferentes niveles dentro de la pila y en numerosos lugares cercanos a la superficie. La concentración minima de CIPC en la capa pelada para la inhibición completa del brotamiento fue estimada en 20 ppm. Inmediatamente después de la aplicación comercial de CIPC, 99% de los lugares muestreados presentaron concentraciones suficientemente altas para inhibir el brotamiento por completo, y los residuos en el pelado fueron generalmente más altos en las muestras obtenidas de la superficie y del fondo de la pila.

Las concentraciones de CIPC disminuyeron durante la temporada de almacenamiento en casi todos los lugares muestreados. Los almacenamientos difirieron en la tasa en que el CIPC disminuyó.

Las medias de los residuos pelados, cayeron debajo del nivel necesario para inhibir el brotamiento en algunos almacenamiento pero no en otros.

La tasa périda de CIPC aumentó al mismo tiempo que el movimiento del aire para mantener el aumento de temperatura deseada.

Con el nivel inicial de 20 ppm como guía, es posible medir almacenamientos comerciales para estados de inhibición del brotamiento.

Nuevos tratamientos antes que los residuos pelados disminuyeron bajo los 20 ppm pueden extender la inhibición del brotamiento en almacenaje.

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Copyright information

© Springer 1979

Authors and Affiliations

  • D. Corsini
    • 1
  • G. Stallknecht
    • 2
  • W. Sparks
    • 3
  1. 1.Federal Research, SEA, USDAUniversity of IdahoAberdeen
  2. 2.Horticultural Seed CropsUniversity of Idaho, Research and Extension CenterParma
  3. 3.Research and Extension CenterUniversity of IdahoAberdeen

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