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Poison oak is identified by 1 ½ to 3 inch long leaflets with two to seven deep lobes resembling oak leaves. Lateral leaflets appear without stalks on viny stems about 3 to 4 feet tall. Like poison ivy, leaflets are grouped three per leaf, and flowers are yellowish. Poison oak is found throughout the southeast and along the Pacific coast in the United States. |
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| Integrated Pest Management Control Recommendations: |
Cultural Practices:
Follow the
same recommendations for control of poison oak and poison ivy. Young plants
less than a foot tall with only a single stem can be physically removed
with little difficulty, especially in the spring when the ground is soft.
Gloves should be worn to avoid allergic reaction. No part of the plant should
contact skin. Burning is dangerous.
Poison oak rarely infests mowed turfgrass areas, but could become a problem in infrequently mowed golf course roughs, as well as in fence lines and along rock walls. Both poison ivy and poison oak are commonly found in rights-of-way and other such minimally managed sites.
Herbicide Use:
Large, well established infestations can be a problem to remove either
mechanically or chemically. A series of postemergent broadleaf herbicide
foliar treatments may be required to conquer a large infestation of poison
ivy or poison oak. Vines which have become well established in trees can
be practically impossible to eradicate without herbicide damage to the tree.
In these situations an ester herbicide labeled for mixing with oil for a
basal stem treatment may be required.
For optimum foliar control, make your herbicide application to poison oak that is actively growing and in the first trifoliate leaf to flower stage of growth.
University Links | Gordon's Recommendations | Germination Dates
