00642 Verges Booklet - Devon County Council

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(vii) Japanese Knotweed (Fallopia japonica) Description Tall vigorous perennial often forming dense thickets: stems stout, somewhat zigzag. Leaves broad triangular. Flowers white in branched spikes. Legislation The Wildlife and Countryside Act 1981 makes it an offence to plant or cause Japanese Knotweed to grow in the wild. The Environment Agency publish “Guidance for the Control of Invasive Plants Near Watercourses”, which contains useful information on identification and effective treatments. Further Information and Control Knotweeds were introduced to British gardens in the nineteenth century for their decorative qualities but often have become pestilential weeds. Japanese Knotweed is probably the worst of all and is now rampant on railway banks, waste areas and some roadside verges. Because of its almost indestructible root system, it is difficult to treat. A degree of eradication may be obtained by applying suitable weed killer (glyphosate), which should be applied twice annually, in spring and late summer. Other invasive Knotweeds can also occur on roadside verges and may require similar treatment. Information The Cornwall Knotweed Forum provides an excellent website: www.cornwall.gov.uk/environment/knotweed/cornwall.htm. The Forum is currently being extended to Devon with the website address www.devon.gov.uk/knotweed.htm. © Cornwall County Council
(viii) Giant Hogweed (Heracleum mantegazzianum) Description Starts growing in March-April, reaching 3 to 5 metres in height. The leaves are dark green, in a rosette, lobes deeply cut and spikey at the ends.The stem is dark redpurple spots or blotches up to 100mm across. The flowers are white forming one large umbrella-like flower head that appears in June-July. Legislation The Wildlife and Countryside Act 1981 makes it an offence to plant or cause Giant Hogweed to grow in the wild. Further Information and Control Giant Hogweed, a native of the Caucasus mountains between Russia and Turkey, was introduced to Britain as an ornamental plant in the late 19th Century. It is now widespread throughout the British Isles especially along river banks. The control of these plants by non-chemical methods should always be considered as the first option. However, this form of management is often labour intensive and time-consuming. Plants may be dugout, but care should be taken to remove much of the root stalk. Cattle, sheep, goats and pigs are also cited as possible methods of control as they eat Giant Hogweed without apparent harm, trampling also damages the plant. Chemical control should only be considered only after non-chemical control has been evaluated and has proved impracticable.The herbicide glyphosate is currently the most effective chemical control for Giant Hogweed. WARNING The hollow stems are attractive to children who use them as “pea shooters” and “telescopes”. However the stems and edges and undersides of the leaves bear small hairs which are coated with poisonous sap and causes blistering and severe irritation. It should not be touched without wearing protective clothing. Giant Hogweed is a potential danger to public health. Seek medical advice if blistering occurs.
Page 1 and 2:
Environment, Economy and Culture Di
Page 3 and 4:
Contents Chapter 1 Preface Page 5 I
Page 5 and 6:
Appendix A Trees for Roadside Plant
Page 7 and 8:
This approach also concords with th
Page 9 and 10:
Devon’s network excludes roads wi
Page 11 and 12:
Devon Road Network Function Mainten
Page 13 and 14:
Objectives The Devon County Council
Page 15 and 16:
● to remove leaf fall at location
Page 17 and 18: Within urban areas there may be a w
Page 19 and 20: undertaken on a more frequent basis
Page 21 and 22: Herbicides based on or containing a
Page 23 and 24: Hedge and Tree Maintenance The poli
Page 25 and 26: such as Robins and Blackbirds, that
Page 27 and 28: of any work that is considered nece
Page 29 and 30: ● Allow room for the proposed spe
Page 31 and 32: (i) Planting sites immediately over
Page 33 and 34: (b) Existing trees may be situated
Page 35 and 36: (c) Loosen soil to a depth of 150mm
Page 37 and 38: It should be borne in mind that add
Page 39 and 40: immediate danger on a major route t
Page 41 and 42: ● the work is undertaken in accor
Page 43 and 44: Statutory Undertakers Working on Ve
Page 45 and 46: position in the highway or street.
Page 47 and 48: Wildflower and Grass Seed Mixes In
Page 49 and 50: New Verges Where new verges are cre
Page 51 and 52: Historical And Archaeological Featu
Page 53 and 54: Litter on Roadside Verges The Envir
Page 55 and 56: Appendix A Trees for Roadside Plan
Page 57 and 58: Species Maximum Height Average Heig
Page 59 and 60: Fig 1.5 To determine the Precaution
Page 61 and 62: Section 141 Restrictions on plantin
Page 63 and 64: Appendix B Harmful Weeds (i) Commo
Page 65 and 66: (iii) Curled dock (Rumer crispus) D
Page 67: (vi) Wild Oats (Avena fatua) Descri
Page 71 and 72: Appendix C Standard Low Growing Lo
Page 73 and 74: Appendix E Sources of Expert Advic
Page 75 and 76: Plymouth City Council, Civic Centre
Page 77 and 78: The Institute of Chartered Forester
Page 79 and 80: Bibliography All publications liste
Page 81 and 82: Arboriculture Research Notes. Arbor
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00642 Verges Booklet - Devon County Council

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