Information about dwarf Rumex humilis

Basic information

Classification of grass damage: Polygonaceae

Grass damage is commonly known as Polygonum maculatum, Polygonum maculatum and Polygonum willowleaf.

English name: polygon lapathifolium L

Damage target: soybean, wheat and rape

give exact information

Occurrence law:

Panicum miliaceum. Emerge from autumn and winter to early spring, and the flowering and fruiting period is from April to June. Seed propagation.

Occurrence area:

It is distributed in the northeast, Hebei, Shanxi, Henan and the south of the middle and lower reaches of the Yangtze River.

Symptom identification:

The hypocotyl of seedlings is developed, crimson, and the epicotyl is underdeveloped. Cotyledons are oval, about 65438±0cm long, and the back of leaves is purplish red; Primary leaves 1, rectangular, without stipules; Epigenetic leaves have stipules. The leaves are covered with black spots, and the back of the leaves is covered with cotton wool.

The height of adult plants is 30-120cm. There are often crescent-shaped dark brown spots on stems and leaves.

Stems erect, branched and glabrous.

Leaves alternate, lanceolate or broadly lanceolate, 5-12cm long,1.5-3cm wide, green, entire, with dense bristles on leaf margin and main vein, and short bristles on petiole; Stipules sheath tubular, membranous, with obvious veins, glabrous.

Flower spikes, several inflorescences arranged in a conical shape; Bracts membranous, with sparse short eyelashes at the edge; Perianth 4-parted, lobes elliptic, light green or pink; Stamens 6, styles 2, curved outward.

Achene, oval, flat, slightly concave on both sides, 2-3 mm long and 65438 0.4 mm wide, reddish brown to dark brown, shiny, surrounded by persistent perianth.