Charlock Management in Organic Systems

Funders: 
Defra
Organisation: 
Garden Organic
Copyright: 
All rights reserved.
Evidence: 
Applied research
Related theme: 
Weeds
Cereals, oil seeds & pulses
People & skills
Key Farming Practices: 
Mechanical weeding
Related links: 
Organic weed management
Back to the future: exploring the benefits of mixed farming
Mechanical weeding project
Weed Control in Grass and Forage Crops

Download the PDF
Resource explained: 

Charlock (Sinapis arvensis L.), a widespread annual weed, is a particular problem in spring-sown crops and can cause serious infestation of winter arable crops. It is especially prevalent on clay and heavy soil and calcareous loams. This leaflet on the control of charlock, produced by Garden Organic (formerly HDRA) as part of the Organic Weed Management Project, OF0315, provides a brief overview of a variety of weed control methods to manage it. It covers biology, persistence and spread, ways it can be prevented, and direct control options.

Findings & recommendations: 
  • Charlock seedlings generally emerge from October to July, with a peak in March-April.
  • Peas and lupins are very susceptible to charlock. Oats are more competitive than other cereals.

Control options include:

  • Delaying sowing and using a stale seedbed.
  • Sowing a spring cereal earlier or a winter crop later.
  • Harrowing of cereals and hoeing of root crops to help reduce a bad infestation.
  • Where land is infested with charlock, cultivating the soil at regular intervals to stimulate and kill successive flushes of charlock seedlings.
  • Stubble cleaning - cultivating surface soil no deeper than 5 cm and repeating at 14-day intervals.

As directed on the leaflet, you can find more detailed information on Garden Organic's 'Organic weed management' pages.

Photo credit for both images of charlock: Garden Organic

Summary provided by: 
Janie Caldbeck

More about the organisation

Garden Organic

partner Garden Organic believes organic growing is essential for a healthy and sustainable world. GO’s mission is to get everyone growing ‘the organic way’ through campaigning, advice, community work and research.

DEFRA

partner Defra is the UK government department responsible for safeguarding the natural environment, supporting the UK’s world-leading food and farming industry, and sustaining a thriving rural economy. Defra’s broad remit means the department plays a major role in people’s day-to-day life, from the food we eat, and the air we breathe, to the water we drink.

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