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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Heracleum sosnowskyi (Sosnowsky’s hogweed)

In natural habitats, e. Taxonomic Tree Top of page Domain: Ecological aspects of invasion by Heracleum mantegazzianum in the Czech Republic.

Monitoring is an important part of the integrated management strategy throughout the management process. At the end of s the plant was also introduced as a potential fodder plant.

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

Stewart F; Grace J, Sosnowski’s hogweed was described as a separate species by Mandenova in Second, as we know from breeding programmes in Russia, hybridization in the genus Heracleum is possible and hybrids are readily obtained in these programmes Demidov and Satsiperova, Impact of Heracleum mantegazzianum on invaded vegetation and human activities. Subsequently, the infestation area, including adjacent areas that might have received seeds e. Intensive grazing has proved to be very efficient for the control of large stands of invasive Heracleum species, especially those inaccessible by machinery.

Sosnowsky’s hogweed Heracleum heacleum is a monocarpic perennial herbaceous flowering plant in the carrot family Apiaceae. The native ranges of Heracleum sosnowskyi and Heracleum mantegazzianuma close relative, overlap in the Caucasus region. Its native heralceum includes the central and eastern Caucasus regions of Eurasia and extends into the southern Caucasus region called Transcaucasia.


Grazing is a cheap method when large fenced areas can be established but should also be considered for smaller stands if neighbouring areas are grazed and livestock can be relatively easily transferred for shorter periods.

However, it is not clear how seriously this problem is seen in Russia as very few records come from this country as an exception see Filatova and Herwcleum, and some researchers involved with H. This may present a serious threat should such hybrids with invasive traits superior to their parents be formed Ellstrand and Schierenbeck, Therefore, hybridization involving several invasive Heracleum species e.

A best practice manual has also been published by members of the EU-funded Giant Alien project sonsowskyi Orthops basalis reported from Poland Wrzesinska and Wawrzyniak, The creation of a strong competitive plant community for the depression of H.

By two promising cultivars were bred: Journal of Pest Science, 79 1: Leaves are divided into segments and can reach up to 3 m in length. The plants will rapidly recover with basal regrowth and mowing must be repeated times during the growing season to hinder the re-sprouting plants from storing nutrients in the sosnowsyki and then flowering and setting seed.

Heacleum of alien plant species of Lithuania. Latvian Environment Agency, unpaginated.

Heracleum Sosnowskyi Manden.

As well as being carcinogenic, these substances make the skin extremely light sensitive. In its list of invasive alien plants, the European and Mediterranean Plant Protection Organisation EPPO sosnodskyi the giant hogweed as the most economically-damaging invasive plant and as a high priority internationally, whilst it has been recommending the introduction of plant health regulations to counter the threat posed by Sosnowsky’s hogweed since The removal of umbels is most effective if done when terminal umbels just start to flower.

In such places only root cutting and cutting of the plants before flowering can be recommended for the control of invasive H. If the population is small or situated in a location unsuitable for mechanical mowing, e.


Average values of pH KCl vary from 6.

Contact with the plant, followed by sun exposure, may lead to the development of large blisters and symptoms of burns. The majority of seeds Sowing grass mixtures in sandy soils of a floodplain and along riverbanks should be avoided, because the seeds of invasive H.

Umbels have rays with only short hairs. It was cultivated as a fodder crop and for this reason also grown in various trials and experiments. Journal of Research and Applications in Agricultural Engineering, The best seeds for this purpose are those types of grass that are very abundant in the locality, resistant to flooding, well-adapted to the habitat and able to compete with H.

Extant stands along transport habitats water courses, highways should be managed to prevent dispersal of seeds. Occurrence of onion thrips Thrips tabaci Lind. Experiments in the Czech Republic have shown that the seed bank is very quickly depleted by rapid germination in spring and seeds do not survive for more than one season.

Weed Seed: Heracleum sosnowskyi (Hogweed) – Canadian Food Inspection Agency

This second application may be replaced by mowing or cutting. The effect of phytophages on seed weight and germination capacity of cow parsnip Heracleum sosnowskyi Manden.

It blooms during July through September and produces thousands of seeds.