Veronica persica

Scientific Name Veronica persica Poir.
Common Names English: Persian speedwell; German: Persischer Ehrenpreis; French: Véronique de Perse, véronique commune
Description Annual, seed-propagated weed that forms many shoots if the soil is well-supplied with nitrogen. It originates from Asia.

Descriptions

Characteristic Features

Foliage leaves regular crenate with rounded lobes.
Basically bigger flowers than ivy-leaved speedwell.

Cotyledons

Spatulate to triangular, rounded at the top, short-petiolate.

Stems

Usually in groups, creeping to ascending, single or ramified, ruffly haired, 40 cm (15.75 inch).

Leaves

Broad-ovate, nearly cordate at the base, regularly notched at the margin with rounded lobelets.
Sparse projecting hairs.
Short-petiolate.

Propagatio Organs

Flowers

Large (8-12 mm; 0.3 - 0.47 inch), sky-blue, with yellowish throat, single in the axils on long peduncles.

Flowering Period

All year round.

Fruit

Fruits flattened, pubescent-reticulate, 7 mm (0.27 inch) broad, sharply keeled. 4-8 seeds in each cell.

Seeds

Cup-shaped, rough, ± 2 mm (0.078 inch).
Germination occurs inspring, under good conditions all year round and depends on light.

Viability Of Seeds

>30 years.

Propagation

By seeds.
50-100 seeds/plant.

Occurrence

Habitat

Turf, fields.

Soil

Humus-rich, nutrient-rich loams. Nitrogen consumer.

Additional Crop Information

Widespread in cereals, especially summer cereals, row crops, vegetable crops, fruit-growing, winegrowing and horticulture.

Agricultural Importance

Veronica persica requires sufficient open space for establishment during emergence and tillering of cereals and during initial development of row crops. The weed competes for nutrients but significant yield losses occur only at densities higher than 25 plants/m² (2.3/sq. ft.).

Control

Integrated Crop Management

Surface cultivation in spring.

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