§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what steps she has taken to ensure that gardeners are aware of the(a) symptoms and (b) procedures for reporting cases of sudden oak death. [149114]
§ Mr. BradshawThe Government believe that the public should have as much information as possible aboutPhytophthora ramorum, the disease known as sudden oak death in the USA. Information about the disease and how to report it is available on the Defra website at http://www.defra.gov.uk/planth/oak.htm. An explanatory leaflet and poster are also available and copies will be placed in the Library of the House. Officials are in regular contact with interested organisations, for example the Royal Horticultural Society and the Horticultural Trades Association, so that information about the disease, its symptoms and guidance on reporting any suspected cases of infection can be disseminated to their members. This information has also appeared in a number of recent press and magazine articles.
Because the symptoms are difficult to distinguish from those caused by other pathogens, we are not relying on public awareness but are carrying out our own surveys of garden centres and nurseries in order to detect infected plants. Buyers of host species have been advised to check plants before purchase for symptoms of the disease and to contact their supplier if they subsequently develop.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs how many checks were carried out at ports of entry in order to prevent the import of plants infected with sudden oak death in(a) 2001, (b) 2002 and (c) 2003. [149235]
§ Mr. BradshawDefra's plant quarantine surveillance programme is focused at nurseries, garden centres and other places where plants are received, rather than at ports of entry. Until May 2002 host plants of "P. ramorum" in intra-community trade were not subject to any specific plant health controls. The following numbers of inspections were carried out in the last three years on rhododendrons and viburnums, the two plant genera which have most often been found to be infected in Europe:
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Nurseries, garden centres etc. At ports UK Other EC Non-EC 2001 224 95 17 0 2002 3190 1147 43 1 2003 9081 2667 20 11
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what instructions she gave to port authorities to prevent the import of plants infected with sudden oak death in(a) 2001, (b) 2002 and (c) 2003. [149236]
§ Mr. BradshawInspectors from the Department's Plant Health and Seeds Inspectorate (PHSI) have authority to detain, inspect and sample plants at ports to ensure that they meet import requirements and are not carrying disease. These inspections relate to a wide range of plant pests and pathogens, not just "Phytophthora ramorum" Any consignment found to be infected or not to have the correct documentation is destroyed. In carrying out these duties, the Inspectorate may call on help from Customs, port health authorities and port operators.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what advice she has issued for(a) gardeners and (b) foresters to prevent the spread of sudden oak death. [149237]
§ Mr. BradshawBoth Defra and the Forestry Commission have published posters and placed information on their websites covering the horticultural and forestry sectors respectively.
Disease management measures are currently focused on nursery and garden centres to ensure that gardeners and other customers can be confident that they are purchasing disease-free plants. There is, as yet, no evidence that the disease is present on any trees in forests but a survey of 1000 woodland sites is currently underway and we hope, by April, to have a better understanding of the status of the disease in the wider environment. This work will enable us to ensure that appropriate advice is made available to foresters. In addition, the Forestry Commission is advising those engaged in routine forestry operations to take basic hygiene precautions to minimise the possibility of accidentally spreading diseases such as "P. ramorum".
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what proportion of(a)) trees and (b) plants recover from infection with sudden oak death; and which species are most likely to recover. [149238]
§ Mr. BradshawThere is at present no evidence, from the UK or anywhere else, to indicate that any plants or trees infected by Phytophthora ramorum might recover. It is for this reason that the current measures require all infected material to be destroyed, either by burning or deep burial. Symptoms of "Phytophthora ramorum" can affect both leaves and stems. In some plants only leaves are affected and in these cases it is possible that plants could recover following the removal of affected leaves. Methods of eradicating infection from specimen plants and of protecting new growth from reinfection are being investigated as part of Defra and the Forestry Commission's programme of research into this disease.
Sporulation of the fungus on certain shrubs which are themselves relatively unaffected, showing only minor symptoms, is believed to have played a key role in the epidemiology of the disease in California.
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§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs (1) whether she has consulted the national authorities of other countries on the treatment of sudden oak death; and if she will make a statement; [149239]
(2) what information she has received from other countries about the treatment of sudden oak death. [149253]
§ Mr. BradshawThere is regular dialogue between plant health authorities in the UK and those in other countries affected by or at risk from "Phytophthora ramorum". It was as a result of this collaboration that the link was first made, even before the pathogen was identified, between the death of trees in California and symptoms seen on rhododendrons on the continent.
Exchange of information on Phytophthora ramorum takes place between officials and scientists in EU Member States on a regular basis, particularly within the framework of the Standing Committee on Plant Health. It was as a result of discussion in this forum that EU-wide emergency measures against the introduction and spread of "Phytophthora ramorum" were introduced in November 2002. They were reviewed by the Standing Committee on 11 December last year and it was agreed that they should continue. An EU funded research project on Phytophthora ramorum started this month and a second project is due to start in April. Both are being co-ordinated by UK scientists and involve consortia with members from 6 to 21 countries.
We have also had regular discussions with officials and scientists in the United States. A US delegation visited in November 2003 and a conference is being organised in the USA in March at which scientists and regulators from a number of countries, including the UK, will discuss developments in research and management of the disease.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs if she will publish the results of research that her Department has commissioned into sudden oak death; what other research into sudden oak death her Department has assessed; and what research projects commissioned by her Department are on-going. [149248]
§ Mr. BradshawThe results of research conducted on this disease will be published over time. However some preliminary results are already available on the Defra website http://www.defra.gov.uk/planth/phnews/ csl.htm. The Forestry Commission are conducting complementary research as part of the same overall programme.
As this is a relatively new disease the research commissioned in the UK following its discovery in October 2001 is still on-going. Within Europe, the majority of research is UK based. Germany and the Netherlands are also investigating aspects of the disease. Defra and Forestry Commission have good links with scientists in these countries and also with scientists in the USA facilitating a regular exchange of scientific information. As the pathotypes of the disease, the host plant species and the environmental conditions differ between the UK and the USA results may not be directly applicable and therefore must be considered carefully.
10WDefra are currently funding four research projects titled:
- 1. Comparison of "Phytophthora" ramorum populations from Europe and USA in support of pest risk assessment, management and policy.
- 2. Non-tree host range and diagnosis of "Phytophthora ramorum" in support of pest risk assessment, management and policy.
- 3. "Phytophthora ramorum" epidemiology: sporulation potential, dispersal, infection and survival.
- 4.Epidemiology of natural outbreaks of "Phytophthora ramorum".
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what treatments are available for sudden oak death. [149250]
§ Mr. BradshawThe only known method of eliminating "Phytophthora ramorum" is the removal and destruction of infected plant material. Currently approved fungicides have a suppressive effect, which masks symptoms rather than eradicating the pathogen from infected plants. However, research at Defra's Central Science Laboratory, funded by the Horticulture Development Council, is looking at a range of substances to evaluate their effectiveness in eradicating infection and preventing reoccurrence.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what organisations in the UK she has consulted on the treatment of sudden oak death; and if she will make a statement [149251]
§ Mr. BradshawThe Department is in regular contact with the Royal Horticultural Society, the Horticultural Trades Association and the National Farmers Union about developments in the treatment of "Phytophthora ramorum".
Moreover, on 13 October, the Department hosted a meeting on "Phytophthora ramorum" at the Central Science Laboratory in York which was attended by over 65 people representing a range of interested organisations.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs (1) which species are vulnerable to sudden oak death; [149252]
(2) what plant types are most susceptible to sudden oak death. [149261]
§ Mr. BradshawThe information requested is as follows.
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Species found to be naturally infected with "Phytophthora ramorum" in America or Europe Host Common name Family Ornamentals Arbutus menziesii Madrone Ericaceae Arbutus unedo Strawberry tree Ericaceae Arctostaphylos manzanita Manzanita Ericaceae Camellia spp. Camellia Ericaceae Hamamelis virginiana Virginian witch hazel Hamamelidaceae Heteromeles arbutifolia Toyon Rosaceae Kalmia latifolia. Mountain laurel Ericaceae Leucothoe spp. Leucothoe Ericaceae Lonicera hispidula California honeysuckle Caprifoliaceae Pieris spp. Pieris Ericaceae
Species found to be naturally infected with "Phytophthora ramorum" in America or Europe Host Common name Family Pittosporum undulatum1 Victorian box Pittosporaceae Rhamnus californicus Californian coffeeberry Rhamnaceae Rhamnus purshianus1 Cascara Rhamnaceae Rhododendron Rhododendron Ericaceae Rubus spectabilis1 Salmonberry Rosaceae Syringa vulgaris Lilac Oleaceae Toxicodendron diversilobum1 Poison oak Anacardiaceae Trientalis latifolia Western star flower Primulaceae Umbellularia californica Californian bay laurel Lauraceae Vaccinium ovatum Californian huckleberry Ericaceae Vaccinium vitis-idaea Cowberry Ericaceae Viburnum spp. Viburnum Caprifoliaceae Trees Abies grandis1 Grand fir Pinaceae Acer macrophyllum Big leaf maple Aceraceae Aesculus californica Californian buckeye Hippocastanaceae Aesculus hippocastanum Horse chestnut Hippocastanaceae Castanea sativa Sweet chestnut Fagaceae Corylus cornuta1 Californian hazelnut Betulaceae Fagus sylvatica Beech Fagaceae Lithocarpus densiflorus Tan Oak Fagaceae Pseudotsuga menziesii Douglas fir Pinaceae Quercus agrifolia Coast live oak Fagaceae Quercus cerris Turkey oak Fagaceae Quercus chrysolepsis Canyon live oak Fagaceae Quercus falcata Southern red oak Fagaceae Quercus ilex Holm oak Fagaceae Quercus kellogii Californian black oak Fagaceae Quercus parvula var shrevei Shreve's oak Fagaceae Quercus rubra Red oak Fagaceae Taxus baccata Yew Taxaceae Sequoia sempervirens Coast redwood Taxodiaceae 1 Hosts from which the pathogen has been cultured and/or detected by DNA tests, but pathogenicity not confirmed by laboratory. 12W
Plants most likely to be potential hosts based on previous results of laboratory inoculation tests Plant species Common name Family Ornamentals or wild shrubs Arctostaphylos uva-ursi Bearberry Ericaceae Eucalyptus Eucalyptus Myrtaceae Fuchsia spp. Fuchsia Onagraceae Gaultheria spp. — Ericaceae Lonicera spp. Honeysuckle Caprifoliaceae Olea europea Olive Oleaceae Photinia arbutifolia — Rosaceae Prunus spp. Nectarine; cherry; Portuguese and cherry laurel Rosaceae Ribes sanguineum Current Grossulariaceae Rosa canina Dog rose Rosaceae Sambucus spp. e.g. elder Caprifoliaceae Symphoricarpus albus Snowberry Caprifoliaceae Vaccinium myrtillus Bilberry Ericaceae Vaccinium x Bilberry-cowberry Ericaceae intermedium hybrid Trees1 Abies procera Noble fir Pinaceae Acer spp. Maple/sycamore Aceraceae Carpinus Hornbeam Betulaceae Chamaecyparis lawsoniana Lawson's cypress Cupressaceae Fraxinus excelsior Ash Oleaceae Malus sylvestris Crab apple Rosaceae Picea sitchensis Sitka spruce Pinaceae
Plants most likely to be potential hosts based on previous results of laboratory inoculation tests Plant species Common name Family Picea abies Norway spruce Pinaceae Quercus spp. Oaks Fagaceae Tilia cordata Small-leaved lime Tiliaceae Tsuga heterophylla Western hemlock Pinaceae Ulmus glabra Wych elm Ulmaceae 1 Based on either sapling or mature log tests, and/or leaf tests. Tests may have been done using wound inoculation and may not predict natural susceptibility of unwounded tissue. Sapling susceptibility does not necessarily predict mature tree susceptibility. (NB. The table is not completely comprehensive, but includes only those considered to have most potential for natural susceptibility)
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what her Department's budget is for the prevention of the spread of sudden oak death in 2003–04. [149254]
§ Mr. BradshawDefra's 75 Plant Health and Seeds Inspectors are already employed for around 20 per cent. of their time on inspection and surveillance duties related to Phytophthora ramorum, known in the USA as sudden oak death. Therefore, although there is no specific budget allocation, this amounts to an expenditure of approximately £1.8 million in 2003–2004.
In response to the growing number of findings of this pathogen in England and Wales, Defra is redeploying around 20 additional staff to assist the Inspectorate in undertaking extra inspections at production nurseries, wild planting areas and ports of entry. They will be supplemented by the recruitment of six additional full time Inspectors for 2004–05. This is part of a package of measures announced on 4 December.
The Forestry Commission has diverted existing resources into a survey of woodlands thought to be at the highest risk of infection. This will cost in the region of £45,000.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs how many individual sites have reported incidents of sudden oak death in the recent outbreak. [149255]
§ Mr. BradshawAlthough P. ramorum is a 'notifiable disease', it is difficult to identify visually, and symptoms are similar to those caused by other organisms. We do not rely on reports in order to locate outbreaks. Defra's Plant Health and Seeds Inspectors are carrying out inspections of all known nurseries and garden centres which trade in susceptible plants. They are also surveying other areas where susceptible plants are established (e.g. rhododendrons in historic gardens), and co-ordinating with the Forestry Commission inspectors who are surveying woodlands. Since the first finding was confirmed in April 2002, outbreaks at individual sites in England and Wales have now reached 302.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs how many cases of sudden oak death have been reported in each of the last five years. [149256]
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§ Mr. BradshawPhytophthora ramorum was first described as a new species in October 2001 and the first outbreak in the UK was not confirmed until April 2002. 130 cases of infection were confirmed in 2002 and 171 in 2003.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs whether she intends to increase the amount of money spent by her Department on research into sudden oak death. [149257]
§ Mr. BradshawDuring this financial year additional money was allocated to the budget responsible for funding research on Phytophthora ramorum. The budget for the coming year has also been increased. The need for research on different plant health risks is regularly reviewed and any issues of redeployment of effort or funding addressed as necessary.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs in which soil types sudden oak death has been found to flourish. [149258]
§ Mr. BradshawFrom limited findings on plants growing in soil in the UK (as opposed to container grown nursery stock), it is hard to draw any firm conclusions. Many of the most susceptible host plants of Phytophthora ramorum are members of the Ericaceae family which are known to prefer acid soil.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs how much money has been spent by her Department on research into sudden oak death. [149259]
§ Mr. BradshawTo date Defra has commissioned research projects to a total value of £391k.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what assessment she has made of the risk to(a) nurseries, (b) gardens and (c) the countryside from sudden oak death. [149262]
§ Mr. BradshawA Pest Risk Analysis (PRA) for the organism causing sudden oak death in California was first conducted in the UK by Forest Research in September 2000.
In November 2001 the causal organism was described as a new species, Phytophthora ramorum. Since that time research has been commissioned both in the UK and in the USA, the results of which are being used to develop the PRA, along with field observations from the UK, Europe and the USA.
The PRA has assessed the risks posed to naturally and experimentally susceptible plant species, including those raised on nurseries, grown in gardens and occurring naturally in the countryside.
The assessment is updated as scientific knowledge about this disease increases. Copies of the risk assessment were placed in the Library of the House on 13 February 2003 and updates have since been placed on the Defra website at http://www.defra.gov.uk/planth/pra.htm.
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§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs how many(a) of her Department's staff and (b) sub-contractors employed by her Department are researching sudden oak death. [149264]
§ Mr. BradshawThe Department has commissioned several research projects into the disease at the Central Science Laboratory (an executive agency of Defra), Forest Research (an agency of the Forestry Commission) and ADAS Consulting. In total there are approximately 22 staff working on these research projects. Around 20 per cent. of the work of the Plant Health and Seeds Inspectorate is currently spent on surveys aiming to determine the distribution of the pathogen and take action against it. This represents the equivalent of approximately 20 staff. A further twelve staff have been transferred from elsewhere in the Department to assist with the surveys.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs what measures she has taken to encourage research into the(a) effect and (b) spread of sudden oak death. [149265]
§ Mr. BradshawSince June 2002 the Department has commissioned research to the value of about £391k to investigate aspects of the biology of the disease including its effect and means of transmission between plants. The research programme is co-ordinated with, other research funded by the Forestry Commission and the Horticultural Development Council in order to maximise the scientific information obtained about this disease. Approximately 20 per cent. of the work of Defra's Plant Health and Seeds Inspectorate over the last year has been directed at surveillance for this pathogen.
§ Mr. PatersonTo ask the Secretary of State for Environment, Food and Rural Affairs whether her Department operates a compensation scheme for those affected by sudden oak death. [149266]
§ Mr. BradshawPlant disease campaigns over many years have not incorporated compensation for the destruction of affected plants. The one exception was the campaign against beet rhizomania disease from 1987 to 2001 when compensation was paid from an industry funded scheme. Our judgment is that the limited resources of the plant health service are better deployed in detecting and identifying outbreaks, and in carrying out research on risks and risk management measures. We have recently received an approach from industry organisations wishing to discuss possible risk-sharing mechanisms to avoid disproportionate losses to individual enterprises when action has to be taken against plant pests or diseases. We welcome this opportunity to explore the available options.