European Journal of Plant Pathology

, Volume 114, Issue 2, pp 175–184 | Cite as

Factors Influencing Transmission of Didymella rabiei (Ascochyta Blight) from Inoculated Seed of Chickpea Under Controlled Conditions

Article

Abstract

Ascochyta blight of chickpea (Cicer arietinum), caused by the fungus Didymella rabiei, has the potential to cause 100% crop loss in severe epiphytotics. Management of this disease often involves reducing sources of inoculum. The influence of sowing depth, host resistance, seed infection level and soil temperature on disease transmission was investigated in a series of glasshouse and growth room trials using seed artificially inoculated with D. rabiei. A positive correlation (R2=0.9992) was observed between rate of seed infection and the incidence of disease on seedlings. Disease transmission to seedlings was not significantly influenced by sowing depth (1, 3 and 6 cm) in separate trials on two cultivars. Susceptibility of the host showed no obvious influence on the frequency of disease transmission in two trials conducted using four cultivars ranging from highly susceptible to moderately susceptible/moderately resistant. Trials conducted in controlled conditions showed that there was no obvious relationship between soil temperature (5, 9, 14 and 19 °C) and the incidence of disease on seedlings.

Keywords

Ascochyta rabiei gram blight 

Abbreviations

AI

artificially inoculated

MS

moderately susceptible

MR

moderately resistant

NI

non-inoculated

S

susceptible

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Copyright information

© Springer 2006

Authors and Affiliations

  • R. B. E. Kimber
    • 1
    • 2
  • E. S. Scott
    • 1
  • M. D. Ramsey
    • 3
  1. 1.Discipline of Plant and Pest ScienceThe University of Adelaide, Waite CampusGlen OsmondAustralia
  2. 2.South Australian Research and Development Institute (SARDI)AdelaideAustralia
  3. 3.Animal and Plant Control CommissionAdelaideAustralia

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