Crop Protection Online > Pests - Weed biology<br> <sub>Agro-region: Denmark</sub> - Papaver rhoeas SU-res
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13.5 2024 undefined

Weed biology
Agro-region: Denmark

Papaver rhoeas SU-res Previous page Next page

Go to identification key for weeds

Can be mistaken for

Papaver rhoeas ALS-resthat is morphologically identical but resistant to all ALS-herbicides
Papaver rhoeas L.that is morphologically identical but not 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

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

True leavesThe 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, culsult  'Main menu'.

Taxonomy

Papaveraceae.

Names in different languages

Danish : Valmue, korn SU-res
German : Klatchmohn SU-res
English : Common Poppy SU-res
Latin : Papaver rhoeas SU-res
Norwegian : Kornvalmue SU-res
Swedish : Kornvallmo SU-res
Papaver rhoeas SU-res: Seedling
Seedling
Papaver rhoeas SU-res: Early stage
Early stage
Papaver rhoeas SU-res: Flower
Flower
Papaver rhoeas SU-res: Mature plant
Mature plant
Papaver rhoeas SU-res: Seeds
Seeds
 
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