Weed

Management suggestions

Type

Examples

Control measures

Comments

Small-seeded annual broadleaf and sedge

Palmer Amaranth Tumble Pigweed

Tall waterhemp

Lambsquarter

Carpetweed

Copperleaf

Eclipta   

Sedges

Buffalobur*

Groundcherry*

Preemergence herbicides, Cultivation

Check herbicide labels carefully for weeds controlled.

Large-seeded annual broadleaf

Tropic croton* Common sunflower

Devil's claw*

Morningglory*

Toothed spurge*

Stale seedbed techniques,

Cultivation,

Mulch

Selective herbicides are not usually very effective.

Perennial broadleaf

Horsenettle*

Bindweed*

Cultivation, Plastic mulch, Hand hoeing, Use non-selective systemic herbicides during fallow years

Heavy infestations are difficult to control in a crop.  Horsenettle may puncture drip irrigation tape.

Annual grass

Large crabgrass Goosegrass

Broadleaf signalgrass

Preemergence herbicides, Cultivation,

Postemergence grass herbicides

Cultivation is most effective while grasses are small.

Perennial grass

Johnsongrass

Bermudagrass

Use non-selective systemic herbicides during fallow periods.

Use postemergence grass herbicides during cropping. Cultivation

Control of heavy infestations during cropping may require repeated applications.

Perennial Sedges

Yellow nutsedge* Purple nutsedge*

Use non-selective systemic herbicides during fallow periods. Use deep cultivation while crops plants small.  Plastic mulch gives partial control.

Avoid heavily infested areas.  Nutsedge can puncture plastic mulch.