Kochia and Russian thistle, which are summer annuals, are troublesome annual weeds of rangelands, pastures, fields, disturbed areas, gardens, roadsides, ditchbanks, and small acreages. If uncontrolled, they become tumbleweeds that can disperse seeds over a large area.

Once fully matured, an abscission layer near the soil surface allows for whole plants to detach and bounce across the landscape dropping seed in a wind-driven process known as ‘Tumble mechanism’. Kochia growth and architecture is highly influenced by …

The stem of the mature, dry plant breaks free from the root to become a tumbleweed in the fall. Green, petal-less, 0.13” (0.3 cm) long flowers occur singly or in clusters of 2 to 6 in leaf axils of the upper stems or in short spikes with long, white hairs and a 0.13-0.5” (0.3-1.3 cm) long leaf-like bract below each flower cluster.

2020年8月10日 · Kochia has a shallow taproot which can be easily pulled or hoed out at early growth stages. Once fully matured, an abscission layer near the soil surface allows for whole plants to detach and bounce across the landscape dropping seed in a wind-driven process known as ‘Tumble mechanism’.

Kochia and Russian thistle are annual plants in the goosefoot family that mature into tumbleweeds spreading their seeds as the wind carries them. Both plants can also accumulate high levels of nitrates making them toxic to livestock. Both are also …

Kochia (Kochia scoparia (L.) Roth) continues to be a serious weed problem in western Kansas, especially with the development of resistance to atrazine, ALS-inhibitor, and glyphosate herbicides. Controlling this weed can be challenging, but …

Its abiotic stress tolerance, tumble seed dispersion mechanism, and ability to outcross allow it to invade new areas and maintain genetic diversity for selection to act on. In a study reported here, I identify the genetic basis of resistance to the herbicide dicamba in a …

Russian thistle (Salsola tragus) and kochia (Kochia scoparia) are common annual broadleaf weeds that become “tumbleweeds” in the fall. These plants can be problematic in many situations where the soil is highly disturbed.

Kochia is more abundant in no-till than in conventional-tillage systems, in part because of its ability to germinate in cool soil associated with crop residue at the soil surface. Management including carefully targeted tillage operations were most effective for reducing kochia populations.

Kochia produces allelopathic (toxic) chemicals that discourage the growth and germination of other more desirable plants. It spreads very quickly, invades agricultural, public, and private lands, and creates a fire hazard.