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What is crop lodging?

There are two types of crop lodging in the UK; root lodging and stem lodging, Both can damage the yield and profitability potential of the crop.

Root lodging

Root lodging is the most damaging and the most prevalent type of lodging in the UK.

  • Anchorage strength depends on spread and depth of the crown roots.
  • Regions of the crown root surrounded with a rhizosheath provide anchorage.
  • Deep roots are only for water. Wide spread & depth increases anchorage strength. More tillers = more crown roots = greater anchorage
  • Most anchorage strength development occurs between GS 30-39

Root lodging occurs if plant leverage is greater than anchorage strength

Stem Lodging

Stem lodging can reduce stem strength by 50% as it gets closer to harvest due to grain fill.

  • Shortening/strengthening of lower internodes is important – these break when stem lodging occurs
  • Gibberellins are produced at the nodes to initiate cell elongation above that node
  • PGRs have greatest effect on node immediately below the growing point
  • PGR applied with fungicide at GS32 (targeting Leaf 3) needs to work quickly to shorten/strengthen lower internodes
  • PGR applied with fungicide at GS30/31 (targeting Leaf 4) needs to work quickly under variable conditions to shorten/ strengthen lowest internode and encourage rooting

Quick, reliable PGR activity is important for lower internodes

Want to know more about lodging? Read these helpful articles to discover how to prevent it.

What are the implications of crop lodging?

What are the implications of crop lodging?

Apart from a dent in grower or agronomist pride there are serious cost implications that arise from a lodged crop.

Learn more
Why do I need a PGR?

Why do I need a PGR?

This spring it will be essential to assess the lodging risk of every crop.

Learn more
When should I apply a PGR?

When should I apply a PGR?

It’s really important to monitor the crop throughout its development and to re-assess your plan as the season progresses.

Learn more
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