Appearance: Winter annual with wavy leaves that have small hairs on the surface and toothed edges pointing towards the tip of the leaf. When mature, bluish to purple flowers will be present.
Scouting: Look for small plants in the fall after germination.
Treatment: Many herbicides are labeled for control; apply in early spring before plant "bolts" or goes into reproductive mode.
KSU & OSU Photos
Appearance: Has a twining growth habit along the surface or climbing on wheat plants. Leaves alternate on the stem and have an arrowhead appearance. Flowers are white when mature and bloom in the morning, closing at night.
Scouting: Scout fo small plants in early spring during "green up" period.
Treatment: Control through herbicede treatments in the summer months and tillage when necessary.
KSU & OSU Photos
Jointed Goatgrass (jointgrass)
Appearance: Wheat-like winter annual grass with hairs along the leaf margin. The spikelet on the head has a cylinder appearance when mature.
Scouting: Has the same growing pattern as winter wheat. Look for young plants between Sept. and Nov.
Treatment: Too closely related to wheat to have many selective herbicides. Clearfield wheat varieties can be planted to allow applications of an imdazolinone herbicide. Crop rotation is the best means of controlling as herbicides could then be used to control.
Appearance: Narrow leaves with hairs along the edges and alternately attached to the main stem; when mature, the stem becomes branched and takes on a red color.
Scouting: Look for small plants in early spring before wheat joints.
Treatment: Several herbicides are labeled for control of Kochia; apply before jointing in the spring.
Russian Thistle (tumbleweeds)
Appearance: Pointed (threadlike) leaves that alternate on young plants; as it matures stem has red streaks.
Scouting: Look for seedlings in early spring.
Treatment: Several herbicides have shown excellent control; apply before jointing in the spring.
Tansy Mustard & Flixweed
Appearance: Leaves have small, deep lobed leaflets; has a bright yellow to white flower when mature.
Scouting: Seedlings germinate in the fall. Look for infestations in fall and early spring.
Treatment: Herbicides labeled for control typically do best with a fall application and some have success in early spring.
Appearance: Looks almost identical to winter wheat when young; becomes taller than wheat later in the season with a more narrow head.
Scouting: Will germinate and grow at the same rate as winter wheat with a tendency to mature a few weeks earlier.
Treatment: Best control is crop rotation; can use certain wheat varieties that allow applications of imidazolinone herbicides.
Appearance: Has a twining or climbing growth structure with heart-shaped leaves alternating from one another.
Scouting: Look for new plants in early spring; growth occurs through wheat jointing, heading and through maturity.
Treatment: Control with herbicides after emergence. Take caution when selecting an herbicide, and pay attention to how late it can be applied in relation to wheat maturity.