Interaction of manganese deficiency and cereal cyst nematodes on barley

1985

Research organisatons

Trial details

Researcher(s) NS Wilhelm, RD Graham and JM Fisher
Year(s) 1985
Contributor South Australian Research and Development Institute
Trial location(s) Waite Adelaide, SA
Further information View external link
Interaction of manganese deficiency and cereal cyst nematodes on barley locations
Aims

To test the hypothesis that altered Mn nutrition of barley affects the development of cereal cyst nematode and damage to the host.

Key messages
  • A factorial pot experiment involving four rates of soil-applied Mn (0, 0.75, 7.5 and 75 mg Mn/pot), four levels of CCN (0, 93, 186 and 372 second stage juveniles per pot) and 12 replicates of one Hordeum vulgare cv. 'Clipper' plant per pot was carried out.
  • Four replicates were harvested 28, 73 and 192 days after sowing and each plant was assessed at harvest for growth, Mn content and level of CCN infection • Several plant growth parameters were measured non-destructively during growth.
  • Resistance (ability of the pathogen to reproduce on the host) was not influenced by Mn nutrition of the host and equal numbers of nematodes invaded and developed to maturity on all plants despite Mn treatments resulting in plant Mn levels which ranged from severely deficient (0 Mn rate) and deficient (low Mn rate) to adequate (two highest Mn rates).
  • However, tolerance (endurance of disease without severe losses in yield or quality) was considerably reduced by the combination of low Mn supply and higher levels of CCN.
  • Plant height was reduced by increasing CCN numbers only at the two lowest Mn rates.
  • These trends were typical of those observed in all plant growth parameters measured in the final two harvests including dry and fresh weight of roots and tops and total dry weight of grain produced per plant. Maturity was delayed in the severely affected plants.
Lead research organisation N/A
Host research organisation Waite Research Institute - The University of Adelaide
Related program More Profit from Crop Nutrition
Acknowledgments N/A
Other trial partners Not specified

Method

Crop type Barley
Treatment type(s)
  • Fertiliser: Rate
Trial type Experimental
Trial design Replicated

Waite Adelaide 1985

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser

Four rates of soil-applied Mn (0, 0.75, 7.5 and 75 mg Mn/pot) and four levels of cereal cyst nematodes (0, 93, 186 and 372 second stage juveniles/pot) were investigated.




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Trial last modified: 21-10-2019 09:35am AEST