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Heracleum sosnowskyi Manden is a perennial (biennial) monocarpic herbaceous plant that bears fruit once, and in 98–99% cases, dies after. Hogweed (Heracleum sosnowskyi) mericarp, outer side Figure 3 – Hogweed ( Heracleum sosnowskyi) mericarp, inner side Hogweed. Heracleum Sosnowskyi was discovered in and described as a separate species in by I. P. Mandenova. Its name is derived from the surname of a.

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Additionally, unintentional transport of seeds, e. Collection of ornamental seed-heads followed by disposal on rubbish heaps can also contribute to accidental introduction to new areas EPPO, CS1 Lithuanian-language sources lt CS1 Russian-language sources ru CS1 sosnowski Russian-language script ru Articles with ‘species’ microformats Wikipedia articles needing clarification from July All articles with unsourced statements Articles with unsourced statements from October Overall it hearcleum typical that the hogweed stands are closed neophyte herracleum where it is a vigorous dominating species.

Sosnowskyi cowparsnip colonizes new areas. When Heracleum plants in dense stands die off in winter, they leave bare soil that can be eroded by rainfall or winter floods. Spraying should be done in dry and calm weather. Since the seeds can survive for several years in the soil, follow-up monitoring of the eradication site for at least five years must be undertaken both within and outside the area to be protected.


[Sosnowsky’s hogweed – toxicology and threat to health].

Leaves of mature plants are divided to a varying extent, either into three approximately equal parts, which may themselves be similarly divided ternateor into more than three leaflets arranged in rows along the central leaf stalk pinnate. Long-term effects of sheep grazing on giant hogweed Heracleum mantegazzianum.

Introduction of new species and evaluation of forms from a collection of fodder crops. These include giant hogweed, giant cow parsnip sosnosskyi used for H. In areas prone to herafleum, management should be continued for as long as possible in a regular fashion, e. No dispersal by birds has been observed EPPO, Abandoned fields should be kept under observation as they can be easily invaded, especially areas with patches of exposed soil.

[Sosnowsky’s hogweed – toxicology and threat to health].

Safety and antiparasitic efficacy of a formulation of Heracleum sosnowskyi. Mechanical and chemical control of Heracleum mantegazzianum and H. Dispersal by wind is usually only at short-distance malthough it can become important at longer distances in winter when seeds are blown over frozen or snow-covered soil surfaces Nielsen et al. The best results are obtained if the established vegetation of invasive hogweed plants is controlled mechanically or chemically prior to the ploughing Nielsen et al.

If the area of skin affected is exposed to UV radiation, it becomes red and begins to itch, and within 16 to 48 hours, blisters resembling burns appear. Hogweed sosnoqskyi its distribution in Latvia.


Studies on biology, distribution, morphology and taxonomy. It starts with the detection and mapping of invaded areas which helps to define management and control plans.

Taxonomic Tree Top of page Domain: It is usually performed with an ordinary spade with a sharpened blade.

Heracleum sosnowskyi – Wikidata

Environmental Impact Top of page Impact on Habitats. The leaf margins have short rounded teeth. Izvestiya Timiryazevskoi Sel’skokhozyaistvennoi Akademii, No.

Marchenko ; Satsiperova Zametki po Sistematike i Geografii Rastenii, The cutting should take place in early spring and herafleum repeated in mid summer. There are discrepancies on the length of the stratification period as Nikolaeva et al. Owing to their large size, stands of Ssosnowskyi. Reference book on dormant seed germination.

Flora of Turkey and the East Aegean islands. Autumn germination under favourable conditions would be also possible sosnowdkyi has not been observed. It is recommended that the root is cut at least 10 cm below soil level or up to 25 cm in cases when additional soil layers may cover the plants.