By surveying weeds in winter, you can identify summer species that have escaped the current year’s weed control program and identify any winter species that have emerged; these weeds need to be controlled before they cause problems in the orchard or before they set seed. Winter surveys help in planning postemergent weed management. If preemergent herbicides have already been used, the survey helps in determining the success of the treatment and identifying resistant populations.
Record your weed survey results (winter weed survey form— ). Keep these records to track weed population information from year-to-year to better understand ongoing weed control problems.
How to survey your orchard
Information collected over a period of years tells you how weed populations may be changing and how effective your management operations have been.