Japanese Knotweed is one of the most common and problematic invasive weeds in the UK today due to its resilience, rapid growth rate and difficulty to fully remove. Like other balsam flowers, the plant reproduces by seed, and it will put out up to 800 of them every year.These seeds can travel a short distance through the air or miles and miles if they get caught up in a river or stream. Investigation into spraying herbicide proved too costly for the type of land and distribution of Himalayan balsam. This is usually around June. Chemical: Currently no selective herbicides are reg-istered for use on Himalayan Balsam. First introduced to the UK in 1839, its rapid growth and attractive flower made it a favourite with gardeners and the seeds were happily shared and traded. • Be aware of where these species occur and their harmful effects. Herbicides. Chemical:9 Glyphosate and 2,4-D Amine has been effective on young plants.4 Sprayed flow-ering plants are still able to produce viable seed.2 7 Herbicide use in riparian areas is restricted to Residual Herbicides; Total Herbicides; Hard Surfaces; Moss Control; Railway Lines; Scrub Clearance; Invaisive. Himalayan balsam is a tall-growing annual and it produces clusters of purplish-pink flowers. Japanese Knotweed identification. Japanese Knotweed; Giant Hogweed; Ragwort; Himalayan Balsam; Buddleia; Insects. Himalayan Balsam (Impatiens glandulifera) is native to the Western Himalayas and, since its introduction in 1839, has spread throughout the British Isles.. It should also be noted that mesotrione reduced the Himalayan balsam weed population by 50% (Figure 6 – overleaf), when applied pre-harvest at bud break. The species is particularly frequent along the banks of watercourses, where it often forms continuous stands. Himalayan Knotweed. 5. Scattered plants are best pulled by hand, being careful to remove the whole plant. Himalayan balsam can stand low light levels and it also creates shade over other plants, so gradually destroying habitats by killing off other vegetation that is in its way. Himalayan Balsam has a distinctive purple flower and seen with abundance throughout the UK. Himalayan balsam plants are easily hand pulled due to the shallow root system. Himalayan Balsam is extremely widespread across the Tweed catchment and is very concerning. Himalayan balsam is a non-native invasive terrestrial plant species. The herbicide used depends largely on the local environment and the timescale required removing the weed. Legal status - Republic of Ireland At present, there are no specific legislative provisions that directly govern Himalayan balsam control or removal in the Republic of Ireland. The herbicide used depends largely on the local environment and the timescale required removing the weed. Tel: 01580 212519 . The control coverage was stepped up in 2016. Weed Management Marshalls Barn Jarmons Lane Collier Street Kent TN12 9PU. It might look pretty, but it really is a nasty piece of work, as it outcompetes native plant species. Himalayan balsam will be listed on the revised Schedule 9 of the Wildlife (Northern Ireland) Order 1985 and therefore it will be an offence to plant or cause it to grow in the wild, upon its inclusion. The seeds are highly viable and germinate early in the growing season. Small infestations of Himalayan balsam can be controlled by hand-pulling the whole plant, including roots, in April and any new growth in September; or by regular grazing, strimming or the application of herbicides. - Wide spectrum of weeds controlled - especially tough and invasive weeds. Himalayan Balsam. The blooms attract bees and other pollinators away from native species. Himalayan Balsam. This herbicide prevents new Himalayan Balsam from growing, however it is an expert herbicide, and can only be applied to your Himalayan Balsam by a trained, experienced expert. Leatherjackets; Chafer Grubs; Brown Tail Moth; Vine Weevils; Head Office. Knotweed, Himalayan Balsam, Giant Hogweed and Skunk Cabbage TECHNICAL NOTE TN697 July 2018 • ELEC Summary • It is important to be able to identify invasive species that occur within the local area. Herbicide treatment for Himalayan balsam is most effective in the spring, before flowering (April – mid June). However it may be easier to leave them until the end of June, start of July, when the plants have flowered, as they will be easier to spot. Control of Himalayan Balsam should ideally happen when the plants have grown to a good height, but have not yet flowered. Himalayan balsam is an annual plant, reproducing by small spherical seeds, 2-4mm in diameter. The Till subcatchment has been treated since 2005, using a mixture of hand-pulling and spraying. Himalayan balsam plants can produce around 2500 seeds each year. Manual control . It blooms from July to frost. Leaf: Finely serrated slender to elliptical leaves, often with a reddish mid-rib. Himalayan balsam, it is a good idea to establish a new grass sward immediately after the first cut/hand-pull of balsam and then keep the grass mown for 2/3 years until all remaining balsam seeds have germinated. It is the tallest annual plant (completes its life cycle in one year) in Ireland growing up to 3m high. For further details see: Using herbicides is an extremely effective method to control Himalayan balsam. The seedpods open in such a way that the seeds are thrown several metres away from the parent plant, helping the species to rapidly spread – often quoted as 20 metres in all directions per season. Spraying: glyphosate based herbicides work effectively on Himalayan balsam. Plants produce around 700 to 800 seeds, which can survive in water for two years. Control efforts aim to prevent the plant from flowering and setting seed, as the seeds are explosive and can spread viable seed over large areas. Plant debris should be inciner- ated or bagged and sent to the landfill. Himalayan Balsam; Bamboo; Contact; Japanese Knotweed. - High levels of grass safety. It’s important to time your Himalayan balsam control so you don’t inadvertently spread more seeds. Manual – As Himalayan balsam is a shallow rooted plant it can be easily uprooted by hand. Plant debris should be incinerated or bagged and sent to the landfill. Himalayan balsam; Rhododendron ponticum; New Zealand pigmyweed (this is banned from sale) You do not have to remove these plants or control them on your land. Invasive Species Guide: Himalayan Balsam 4 | P a g e Invasive Species Guide: Giant Hogweed Photos are sourced from GBNNSS, Tom Richards and RPS group Plc. 3.10 Alternatively, herbicide spot spraying treatment of all Himalayan balsam can be carried out during May of each year, again before plants seed. Spraying – Using herbicides is an extremely effective method to control Himalayan balsam. Although very attractive in appearance, Himalayan Balsam is a pest and one of the most rapidly spreading Invasive weeds in the UK. If the Himalayan Balsam is near a water-course the use of chemical control may be impossible. When touched, the seed pods shoot the seeds far afield. Himalayan balsam is easy to pull out; ideally this work should be carried out before it flowers. It should take about 2 - 3 years of annual treatments to clear the infestation, after which you should perform annual checks to control any new seedlings growth. Himalayan Balsam has been added to Schedule 9 by The Wildlife and Countryside Act 1981 (Variation of Schedule 9) (England and Wales) Order 2010: this means that it is illegal to plant or otherwise cause to grow Himalayan Balsam in the wild. - Soluble concentrate selective herbicide for the control of weeds (such as Japanese knotweed, Himalayan balsam, buddleia and bramble) in non-crop situations. Management of invasive weeds in or close to water and other vegetation. Fax: 01580 212513. Chemical control - you must only spray during the growing season when there is green leafy material present and most of … Chemical Control: Herbicide treatments can work well for large populations of Giant Hogweed. 1.11 Alternatively, herbicide spot spraying treatment of all Himalayan balsam can be carried out during May of each year, again before plants seed. Himalayan Balsam (Impatiens Glandulifera) Species Identification Height: A tall, annual herb growing up to 2.5m Stem : Hollow brittle stems which are light green/ red early in the year, turning pink/red in summer. Himalayan balsam Photo:T. Belton Impatiens glandulifera Where is it found? The use of herbi-cides in aquatic environments requires Alberta-specif-ic applicator certification and permits. Herbicide use should only be considered if manual control techniques are not possible. Himalayan balsam (Impatiens glandulifera) is an invasive terrestrial plant species that was first introduced as an ornamental garden plant and is spread exclusively by seed.Since it was introduced, it has spread to most parts of Ireland. As well as harming the environment, Japanese Knotweed is able to grow through the smallest gaps in walls, … Himalayan balsam likes wet soil and riparian (along streams) areas. Getting Horsetail Under Control. Himalayan balsam plants are easily hand pulled due to the shallow root system. Control of invasive non-native species - Himalayan balsam Eradication may be possible in two to three years unless your site is being colonised by seeds from further upstream. Horsetail. Himalayan Balsam is an invasive plant with easily identifiable pink or white heart-shaped flowers, that was introduced to the UK in 1839. It is the tallest annual plant found in the British Isles, growing to more than 2-3 metres in height. There are two recognised methods for removing the species; Pulling and Herbicide Treatment The dangers of Knotweed . Each plant has the ability to spread over 7 metres every season, making it difficult to eradicate without a coordinated approach, particularly around rivers and water courses. Results. Himalayan balsam, it is a good idea to establish a new grass sward immediately after the first cut/hand-pull of balsam and then keep the grass mown for 2/3 years until all remaining balsam seeds have germinated. Himalayan Balsam. The seeds of Himalayan balsam persist in the soil for 18 to 24 months; however, seed persistence of up to 36 months has been reported. - Himalayan balsam has a high sap/water content and so when cutting protective clothing is advised in case your skin is sensitive to the sap. - Virtually no odour. Himalayan balsam is a fairly common and widespread weed nowadays! Where Himalayan Balsam is present, excavation, ditch digging and ploughing should be avoided. Because Himalayan balsam is often found near water, herbicide control can be difficult. Grazing and trampling by cattle and sheep. For large, riverside infestations, a specialist invasive species control company should be consulted. Where Himalayan balsam is a problem, metribuzin now has an approval to help growers control the weed in new plantations. Bare soil provides ideal conditions for the seeds to germinate. Destroying footpaths across Britain and frustrating gardeners – probably the plant species which causes the most damage to infrastructure and gardens (Mares Tail). If you've ever wandered along a riverbank, pond or lake, we guarantee you will have seen it at least once! Stamford RiverCare has been waging war on Himalayan Balsam (Impatiens glandulifer), an invasive plant species found on the banks of the River Welland in Stamford. The flowers are followed by growing seed pods that open explosively when they are ripe. Himalayan Balsam Solutions. Himalayan balsam is an annual plant that grows from the previous year’s seeds. Extreme care is needed to ensure all seed pods are disposed of in your domestic rubbish and not composted. 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