|Scientific Name||Kochia scoparia (L.) Roth|
|Common Names||English: Summer cypress, Kochia, Mexican fireweed; German: Sommerzypresse; French: Kochia faux-cyprès; Spanish: Pinillo, Ciprés de verano, Morenita, Falso ciprés|
|Description||Annual weed with taproot, reproducing by seeds. The stem is erect, spreading, with ascending branches from a central stem. Mature plants grow round and bushy.|
Pyramidal growth form, early stages grow in rosette.
Leaves narrow and lance shaped. Young plants appear as a rosette.
Rather thick, three to four times as long as broad. Upper surfaces dull green and magenta on the underside.
Erect, ramified, up to 30-150 cm (11.81 - 59.05 inch) high. Main stem and branches covered with villous hairs.
The alternate, simple leaves are pubescent to nearly glabrous, one to two inches long, lanceolate to linear with hairy margins, and without petioles.
Small, greenish, inconspicuous at the end of branches.
Summer - early autumn.
Brown flattened seeds, grooved on each side.
Viability of Seeds
By seeds. 200-20,000 seeds/plant.
K. scoparia is a highly adaptable weed and invades dry pastures, rangelands and cropland, ditch banks, wastelands and cultivated fields. It is very drought tolerant and can spread rapidly in these conditions.
Wide tolerance of soil types, alkaline soils as well as salty soils.
Kochia scoparia is a noxious, invasive, annual weed and reduces crop yield due to effective competition for light, nutrients, and soil moisture. Dead plants break off at the base and are blown by the wind as tumble weeds. The plants can accumulate high concentrations of nitrate. Also photosensitivity in livestock was reported; the pollen causes hay fever.
Useful non-chemical contribution to Integrated Weed Management
Early tillage in spring usually provides good control of Kochia seedlings. Mowing or slashing the plants before flowering is effective in reducing seed production.
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