Herbicide Injury Symptoms

Herbicides Which Affect Seedling Growth:
Inhibitors of Shoot Growth

Common Herbicides in the Group:

• EPTC (Eptam)

• pebulate (Tillam)

• cycloate (Ro-Neet)

• ethofumesate (Progress, Nortron)

• molinate (Ordram)

• butylate (Sutan)

• triallate (Avadex)

How Applied:

These herbicides are soil applied and somewhat volatile.

Movement in the Plant:

These herbicides enter plant roots and move in the xylem with the transpiration stream to the shoots.

Mode of Action:

The mode of action is unclear but they affect developing leaves in the growing points of susceptible seedling plants.

Common Symptoms:

Stunting and distortion of seedling leaves.

Effects of Inhibitors of Shoot Growth

This developing bean seedling shows the affects of EPTC. Notice the stunting, leaf distortion and the way the leaves seem to stick together.

These corn seedlings have emerged from soil treated with EPTC. Notice again the stunting and severe leaf distortion.