|Scientific Name||Matricaria inodora L.|
|Synonyms||Tripleurospermum perforatum (Mérat) Lainz, Tripleurospermum maritimum subsp. inodorum, Matricaria perforata|
|Common Names||English: Scentless false mayweed, scentless mayweed, scentless chamomile, wild chamomile, false chamomile, German chamomile; German: Geruchlose Kamille; French: Matricaire inodore; Spanish: Matricaria, margarita|
|Description||Annual, seed propagated weed, up to 50 cm (19.68 inch) high.|
Almost scentless, flower cups pulpy (M. chamomilla with hollow flower cup).
Suborbicular, dense, oval, pointed at the top, quite long-petiolated, prostrate.
Erect, branched only from the middle.
Alternate, glabrous, 2-3 pinnate, with fine, narrow, linear, spiny tipped segments.
Flower heads large, terminal and arranged singly on stems and branches. The involucral bracts are oblong-ovate and almost single-rowed.
Disc florets are golden yellow and ray florets are white, 12-20 and spreading.
Fruit with calyx persisting (as 5 small lobes on the top of the fruit); dry; urceolate; indehiscent, 1.5 - 2.2 mm (0.059 - 0.086 inch) long; 0.7 - 1.2 mm (0.027 - 0.047 inch) wide brown (pale); glabrous; surface venation ribbed.
Gray to black (often dark brown), 1.5 mm (0.059 inch) long, 3-angled and grooved, possessing some dormancy;
Germination in autumn and spring.
Viability of Seeds
10,000 - 100,000 seeds/plant. M. inodora is a shallow germinator.
Most widespread weed of the Chamomile family on arable land in Europe. Found on ruderal sites, paths, etc., pastures, hayfields, cultivated fields and particularly along roadsides.
More or less acid soils, well supplied with water and nutrients, preferring a moderate degree of warmth to thrive, neutral loam soils or damp clay.
Additional Crop Information
Widespread agricultural weed in all crops, mainly in cereals.
M. inodora is a major weed in Northern Europe with a deep root system. Methods of “Reduced tillage” in spring often fail to control plants that emerged in autumn. Scentless mayweed competes for water and light, interferes with combine harvesting and therefore reduces yield.
Useful non-chemical contribution to Integrated Weed Management
Frequent shallow tillage in autumn and spring. A cultivator with mounted harrows is effective in controlling the seedlings.
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