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Take-all

Take-all (Haydie)

Description

 

  • Take-all's host range is confined to grass speices

  • Take-all survives in the root and tiller bases of previously infected plants

  • Following autumn rains, the take-all fungus grows out of this material and attacks the roots of susceptible plants. 

Symptoms

  • Characteristic blackening of the sub-crown internode and roots

  •  Severely infected plants also show blackening of the stem base under the leaf sheath

  • Plants appear stunted and yellow/green, with reduced tillering 

  • Water stress often results in deadheads or white heads with little or no grain filled

Damage

  • Yield decreases from water stress and reduced tillering/deadheads are common

  • Grain quality is also affected

Control

Planning ahead and ensuring a grass free break in the year before cropping, as well as crop rotation and seed and fertiliser treatments are effective in reducing the severity of the disease. Little can be done for an infected crop during the season. 

 

Links and Resources

DEPI VIC - Take-all (Haydie)

The section on take-all details symptoms, survival, hosts, conditions increasing take all damage, control, and disease breaks. Published 1996, updated 2013, reviewed 2013.

Victorian winter crop summary 2014 - Take - all

Table 6: Wheat disease guide. Page 11. Causal organism, symptoms, occurrence, inoculum source, and control. Updated annually.