How to Manage Pests
UC Pest Management Guidelines
Most celery-growing regions are only confronted with annual broadleaves and grasses, and most of these, except little mallow, are effectively controlled with current weed management tools.
LITTLE MALLOW. Little mallow can be controlled with postemergent applications of linuron and prometryn. However, it is difficult to control if allowed to get too large (five to six leaves). Larger plants will be burned back and not completely controlled.
YELLOW NUTSEDGE. This weed is not a problem during the winter months and can be managed with field selection, crop rotation, or mechanical methods. Linuron provides postemergent burn back of this weed, and S-metolachlor provides preemergent control.
UC IPM Pest Management Guidelines: Celery