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Tomato
> Year-Round IPM Program > Preharvest > Weed
Survey
Tomato
 Weed
Survey—Preharvest
Conduct a survey immediately before harvest to determine the
spectrum of weeds present for next year's planning records. Records
from previous crops will indicate which weeds escaped control,
thus possibly infesting future crops.
How to survey
Walk through each field in a random pattern,
rating the degree of infestation for each weed species. Use either
a numeric scale of 1 to 5 (1 being the lightest, 5 being the
heaviest), or rate as "light," "medium," or "heavy."
- Note the location of weeds producing seed as carefully as
possible.
- Check fencerows, ditch banks, field edges, and wet spots
as these may be problem areas for weed growth.
- Check areas around the field edges as these areas could be
potential sources for wind-disseminated seeds.
- Pay particular attention to perennial
weeds.
- Sketch a map of the field and mark areas with major weed
infestations for follow-up control action.
- Record results on a weed
survey form .
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