|Scientific Name||Lamium amplexicaule L.|
|Common Names||English: Henbit dead-nettle; German: Stängelumfassende Taubnessel; French: Lamier amplexicaule; Spanish: Ortiga muerta menor, Conejitos, Gallitos|
|Description||Annual or hardy-annual (facultative biennial), seed-propagated weed with deep taproot.|
Upper leaves enclosing the stem.
See red dead-nettle, tips at the base usually not touching each other.
Erect, 10-20 cm (3.93 - 7.87 inch) high, ramified below, square, upwards softly haired.
Crossed opposed, round-reniform, lower leaf pairs wide apart from each other, long-petiolate, upper leaves enclosing the stem, all reticulately wrinkled, margin deeply notched.
Corolla bilabiate, pink to carmine, in dense axillary whorls.
All year round with mild weather.
Nutlets brown, 2 mm (0.078 inch) long, glabrous, 1-seeded, oblong-oval, keeled.
Oblong to elliptical, white moldy.
Germination usually in autumn, but also spring. Henbit dead-nettle is a shallow germinator.
Viability of Seeds
About 5 years.
Waste ground, lawns, cultivated fields, pastures, roadsides, railroads, vineyards.
L. amplexicaule likes nutrient-rich, well-aerated lighter, sandy loam soils.
High weed infestation causes yield loss. Mass infestation only occurs in warm areas (grape production). In cultivated areas that get tilled regularly, flowering plants can form large patches of pink color in the spring. L. amplexicaule prefers warmer areas than Lamium purpurea. The flowers provide nectar for bumblebees.
Useful non-chemical contribution to Integrated Weed Management
Mechanical weeding including the use of a tine harrow may offer high levels of control when performed at the seedling stage.
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