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Nutsedge root system.

Survey Weeds—Fruit Development

Late spring weed survey. Survey your orchard in late spring or early summer, after summer annuals have germinated. By surveying weeds at this time, you can identify any species that escape control from earlier management and know what perennials are present. If herbicides were used, monitoring identifies any need for changing to another herbicide.

How to survey

  • Pay particular attention to perennials.
  • Check for re-growth of perennials a few days after cultivation.
  • Record weeds found in rows and middles separately. Weeds in tree rows must be managed, but annual weeds in row middles may be beneficial as a cover crop
  • Record your observations on the late-spring weed survey form (106 KB, PDF) and use the map to show areas of problem weeds.

Also, keep records of weed management actions including timing, rates and dates of herbicide applications and cultivations. Survey information collected over a period of years tells you how weed populations may be changing and how effective your management operations have been over the long term.

Important links

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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