Common name : acrid weed.
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Reproduction by seeds.
|Description : ||Terrestrial, annual, erect herb, up to 60 cm tall. Taproot white or brown. Stem quadrangular, solid, glabrous. Stipules absent. Leaves simple, not lobed or divided, opposite, sessile, lanceolate, less than 2 cm long/wide, margin entire, apex acute or obtuse, base cordate or obtuse, one-veined. Flowers bisexual, grouped together in an axillary, sessile glomerules, red, pink, or purple, petals absent. Fruit a capsule, opening irregularly, transversely.|
Flowering May to October, fruiting July to November.
In inundated or very wet sites, from 0-1200 m alt.; lowland rice fields.
(Sub-)tropical Asia to tropical Australia. Tropical Africa.
May become very harmful in rice fields, especially when fields run dry due to lack of water.
Mechanical, but difficult as severed parts regenerate easily.
2.4-D at high rates; MCPA is less effective. Growth-regulating herbicides like oxadiazon, a mixture of propanil with oryzalin, nitralin or butachlor.
In India, leaves are used to reduce the sexual libido in animals.
-Soerjani M., Kostermans A. J. G. H., Tjitrosoepomo G. 1987. Weeds of rice in Indonesia. Balai Pustaka. Jakarta.
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