The influence of in-egg mortality and spontaneous hatching on the decline of Globodera rostochiensis during crop rotation in the absence of the host potato crop in the field

Ken J. Devine, Colum Dunne, Fergal O'Gara, Peter W. Jones

Research output: Contribution to journalArticlepeer-review

Abstract

The decline of Globodera rostochiensis (Woll.) populations in two fields was 57% during the first and 40.3% during the second year of crop rotation in the absence of a potato crop in Co. Cork, Ireland. The decline was found to be clue to both spontaneous hatch and in-egg mortality. Spontaneous hatch accounted for between 75.8 and 80.2% of the decline experienced during rotation. Inegg mortality was found to be responsible for a reduction of approximately 10% in the total number of viable eggs in both fields, and was positively correlated with soil temperature in the field. The number of culturable bacteria and the composition of the bacterial microflora in the cysts was found to change with increasing soil temperatures. The increase in cellulase-positive isolates reflected the effect of temperature on egg degradation.

Original languageEnglish
Pages (from-to)637-645
Number of pages9
JournalNematology
Volume1
Issue number6
DOIs
Publication statusPublished - Oct 1999

Keywords

  • Cellulase
  • Collagenase
  • Natural control
  • Potato cyst nematode
  • Soil bacteria

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