Guidance for measuring plant population and assessing CSFB damage

  • At the 4-8 true leaf stage:
  • To measure plant population where the crop has been drilled in rows, count the number of plants in 1m length of row at 4-8 true leaf stage. Measure and record the row width (cm).
  • If the crop has been broadcast, count the number of plants in a 1m x 0.5m area.
  • Estimate the % leaf area affected by CSFB damage at the sampling position (using the figure below).
  • Take an overhead photograph of the assessment area. Repeat this at another four positions across the field.

This assessment can be done later if your crop is more forward.

CSFB damage scale