Crop Protection Online > Pests - Weed biology<br> <sub>Agro-region: Denmark</sub> - Papaver rhoeas ALS-res
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26.11 2024 undefined

Weed biology
Agro-region: Denmark

Papaver rhoeas ALS-res Previous page Next page

Go to identification key for weeds

Can be mistaken for

Capsella bursa-pastoris, which has star-shaped hairs.
Papaver rhoeas L. that is morphologically identical but not resistant to ALS-herbicides
Papaver rhoeas SU-resthat is morphologically identical but only resistant to SU-herbicides

Resistance to herbicides

There have been significant populations of this weed in Denmark, which requires special considerations in the control. Read more here.

Characteristics

Cotyledons
Long and slender with entire leaf margins. Unstalked. Smooth surface. Length approx. 4 mm.

True leaves
The first true leaves are oval to egg-shaped with entire leaf margins. Stalked. The surface is covered with widely spaced hairs. Length approx. 5 mm. Later true leaves have deep incisions in the leaf margin. The later true leaves contain latex, which can be seen by squeezing a torn-off leaf.

Mature plant
Common Poppy is a high plant, approx. 20-80 cm, which is known by its large, red flowers, which during the summer are visible in winter crops, along roads and field boundaries. The diameter of the flower is approx. 50-80 mm. Seed production: Up to approx. 20,000 seeds per plant.

Seed
Kidney-shaped with egg-shaped cross section. Net-like, pitted surface. Thousand grain weight approx. 0.1 g

Biology

Propagation and dispersal
Only through seeds.

Habit
Summer and winter annual.

Importance

The species is most common on loamy soils in winter crops. In all crops in which the species is found it can cause quite heavy losses, even at small densities.

For treatment options, consult 'Herbicides Across'.
For more options, consult 'Main Menu'.

Taxonomy

Papaveraceae.

Names in different languages

Danish : Valmue, korn ALS-res
German : Klatchmohn ALS-res
English : Common Poppy ALS-res
Latin : Papaver rhoeas ALS-res
Norwegian : Kornvalmue ALS-res
Swedish : Kornvallmo ALS-res
Papaver rhoeas ALS-res: Seedling
Seedling
Papaver rhoeas ALS-res: Early stage
Early stage
Papaver rhoeas ALS-res: Flower
Flower
Papaver rhoeas ALS-res: Mature plant
Mature plant
Papaver rhoeas ALS-res: Seeds
Seeds
 
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E-mail to planteit@seges.dk