Large grass with lice

The large grass with lice , or Ambrosia trifida , is an annual plant of the family of the Astéracées.

The plant is mainly with the Canada, along the rivers and rivers and especially in rough ground, for one period ranging between the beginning of the summer until the first cold ones.

Its foliage is cut out and the male flowers produce enormous quantities of very light Pollen that the wind can transport. This Pollen, like that of the Ambrosia to sheets of armoise, is strongly allergenic.

Each grass seedling with lice can produce 3.000 seeds which will be able in their turn to produce 600 new seedlings the following year. The capacities of adaptation of this plant enable him to invade the poorest grounds.

Weeding

Also, it is preferable to tear off it grounds close to the dwellings before flowering (August). The grass with lice is easy to tear off. Another method of tested eradication is the preliminary sowing of the sites infested with more competitive species such as the buckwheat, the Pâturin, the Trèfle.

Allergies

The agent Allergen of grass with lice, its pollen, causes at the end of July at the end of September, the allergic rhinitis (a respiratory allergy) at close to a person on ten in the most infested areas. The exposure to pollen is a factor release of asthma.

Pollen can also produce démangaisons with appearance of pigmented red plates of white points. The remedy consists in taking quickly a drug antihistamine (like Benadryl), and applying a lotion intended to calm itchings. This application is to be renewed until the disappearance of the plates.

See too

Québécois Table on Grass with Lice
Its name can merge in the spirits with the Herbe with chip which is completely different.

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