Johnson grass

(redirected from johnsongrass)
Also found in: Dictionary, Thesaurus.
Related to johnsongrass: Sorghum halepense

Johnson grass:

see sorghumsorghum,
tall, coarse annual (Sorghum bicolor) of the family Poaceae (grass family), somewhat similar in appearance to corn (but having the grain in a panicle rather than an ear) and used for much the same purposes.
..... Click the link for more information.
.

Johnson Grass

 

(Sorghum halepense), a perennial herbaceous plant of the Gramineae family; a pernicious weed.

The stems of Johnson grass are 1–2 m high. The inflorescence is a panicle (to 40 cm). There are two or three uniflor-ous spikes on each sprig. A single plant yields several thousand fruits, which drop off and heavily litter the soil. The rhizomes are segmented, with thick internodes and nodes. The mature plant is a vigorous bush with numerous shoots and rhizomes that densely penetrate the topsoil. The principal mass of rhizomes lies up to 20 cm deep, but a few penetrate to a depth of 60–80 cm. Johnson grass is found from the Mediterranean to India and China. In the USSR it is found in the Crimea, the Caucasus, and Middle Asia. The shoots yield a high quantity of nutritive green matter. Johnson grass is readily eaten by horned cattle and horses, both in green form and in the form of hay. At the same time, it is a dangerous and resistant weed of irrigated agriculture; it contaminates all crops, especially cotton. It often grows along the banks of rivers and irrigation ditches. Control measures include deep clod plowing in summer, drying the rhizomes for two weeks; careful and deep cultivation of row crops; sowing alfalfa and mowing it down early (which greatly suppresses and destroys the Johnson grass); autumn plowing to a depth of 20–30 cm; and systematic mowing of Johnson grass in irrigation ditches.

REFERENCES

Agadzhanian, G. Kh. Biologiia gumaia i mery bor’by s nim.Yerevan, 1939.
Kormovye rasleniia senokosov i pastbishch SSSR,vol. 1. Edited by I. V. Larin. Moscow-Leningrad, 1950.
Nikitin, V. V. Sornaia rastitet’nost’ Turkmenii.Ashkhabad. 1957.
Kott, S. A. Sornye rasteniia i bor’ba s nimi,3rd ed. Moscow, 1961.

T. V. EGOROVA and V. V. NIKITIN

References in periodicals archive ?
Deliberation response of weeds in comparison to saline-treated control group Johnsongrass seeds was observed that most (4.808) and treated seeds Malva 12 dS m (0.115) had the lowest shoot length.
Johnsongrass, like switchgrass, was first cultivated as forage, but it subsequently escaped and has become one of the world's most expensive weeds in terms of control costs (Warwick and Black 1983).
Noxious Downy brome Bromus tectorum Invasive Field bindweed Convolvulus arvensis Noxious Field sowthistle Sonchus arvensis Noxious Garlic mustard Alliaria petiolate Invasive Hoary cress, whitetop Cardaria draba Noxious Japanese honeysuckle Lonicera japonica Invasive Japanese knotweed Polygonum cuspidata Invasive Johnsongrass Sorghum halepense Noxious Kudzu Pueraria montana Invasive var.
They can survive entirely on upland plants such as Bermuda grass, clover, and Johnsongrass, if grown near a farm pond.
If this gene were to "escape" into the environment to a weed such as johnsongrass, it would have a major impact on the control of this weed.
Some of the more commonly used warm-season grasses are Bermudagrass, Johnsongrass, Bahiagrass, Dallisgrass, Switch grass and the Bluestem grasses.
Important weeds that pose a threat to horticultural crops include dandelion, Canadian thistle, field bindweed, common lamb's-quarter, Johnsongrass, quackgrass, common cocklebur, and large crabgrass.
var glandulosa) and eastern red cedar (Juniperus virginia L.) (Kiniry 1998) and johnsongrass [Sorghum halepense (L.) Pers.] (Kiniry 1994).
Grasses include Aristida oligantha (prairie threeawn), Brachiaria platyphylla (broadleaf signalgrass), Cynodon dactylon (bermudagrass), Paspalum dilatatum (Dallasgrass), Setaria parviflora (yellow bristlegrass), Sorghum halepense (Johnsongrass), and Tridens strictus (longspike tridens).
We walk under fruit-heavy limbs, through johnsongrass and pigweed, then up between rows of Galas.
Identification of graminicide-resistant johnsongrass (Sorghum halepense).