Nicola Spence, Chief Plant Health Officer Defra; Sarah Eberle, RHS Award Winning Garden Designer; Peter Clay, Crocus,: Nicola Gammon, Shoot: Wayne Grills CEO BALI; Angela Halksworth, Tendercare discuss innovation in the battle against invasive plant health risks

1. Hashtag for today #PlantHealth

2. FACEBOOK LIVESTREAM
• Welcome to those watching online!
• Please do chat with each other on Facebook – but also be aware comments get deleted by
Facebook when the video is saved.
• We cannot moderate conversations or take online questions for the speakers today.
• Twitter hashtag #PlantHealth
#PlantHealth

3. AGENDA
Welcome
Angela Halksworth, Tendercare
• Safety notices, facilities, getting onto WiFi and networking at the end
Nicola Gammon, Shoot
• Facebook process, slides & event agenda
Nicola Spence, Chief Plant Health, Defra
• Plant Health Update
Sarah Eberle, Award-winning garden designer & Peter Clay, Crocus
• The Resilience Garden Chelsea 2019
#PlantHealth

4. Nicola Gammon, Shoot
• Other plant biosecurity initiatives - Wayne Grills, CEO BALI
• About Shoot and our customers
• Data Science & AI innovation
• Plant biosecurity data now & improvements in future
• Work with us – we are planning significant innovation and growth
Angela Halksworth, Tendercare
• Why and how working with Shoot
• Plant biosecurity measures
• Next steps – call to action
Q & A all speakers
Close and thank you
AGENDA
#PlantHealth

5. Plant Health Update
Nicola Spence
Chief Plant Health Officer

6. Arrival of pests and pathogens in Britain
6

7. Tree pest and disease outbreaks since 1970

8. Increasing demand for mature plants/trees
8

9. Risks in plant products
9

10. Wood and wood products
10

11. Machinery, vehicles and equipment
11

12. Direct sales and postal services
12

13. Household items
13

14. Larger furniture
14

15. Works of art
15

16. 16

17. Steel consignments…
17

18. Non-compliant wood packaging
18

19. Sports venues
19

20. Food trends
20

21. Garden trends
21

22. UK Plant Health Risk Register
22

23. Steady increase in Risk Register numbers

24. Risk group provides support for regulating
high risk hosts and pathways

25. Some of the Most Unwanted

26. Xylella fastidiosa and the common meadow
spittlebug Philaenus spumarius

27. Italy (subspecies pauca)
• First findings in EU, from 2013 – olive most affected host
• Containment zone established in Lecce/parts of Brindisi
• New findings being confirmed beyond the buffer zone, with continued delays
in felling
27

28. Disclaimer: The information in this graphic is not complete as it only considers the main plant species considered relevant to the UK horticulture and gardening sector. The information was
correct as of September 2018, however new host species are being added to the list as they arise. Please check the DEFRA Plant Health Portal for up to date information. The HTA does not
accept any responsibility or liability for the accuracy of the information contained in this graphic, nor shall be responsible for any loss of business or profits resulting from any use of this
information.
Olive (Olea europaea)
Prunus avium
(Wild cherry)
Xylella fastidiosa (X.f.) subspecies and host
plants
X.f. subsp. pauca
X.f. subsp. fastidiosa
X.f. subsp. multiplex
Walnut (Juglans regia)
Almond (Prunus dulcis)
Italian buckthorn (Rhamnus alaternus)
Rosmarinus
Lavandula
dentata
Polygala
Oleande
r
Vitis vinifera (Vines)
Myrtl
e
French Lavender (L. stoechas)
English Lavender
(L. angustifolia)
Streptocarpus (House plant)
Erysimum (Wallflower)
Coffe
e
Rock Rose
(Cistus
monspeliensis)
Lavender hybrids (L. x allardii, L. x intermedia)
Spanish broom (Spartium junceum)
Dog rose (rosa canina)
Easter broom (Genista)
Figs (Ficus carica)
Alfalf
a Common broom (Cytisus)
Hebe (all)
Curry plant (Helichrysum italicum)
Rock rose (Cistus salviifolius)
Euryop
s
Scented geranium (Pelargonium graveolens)
Coronilla (shrub vetch)
Wormwood (Artemesia arborescens)
Cherry plum (Prunus cerasifera)
Sour cherry (Prunus cerasus)
Plum (Prunus
domestica)Ash, narrow leaved (Fraxinus angustifolia)
Quercus suber (Cork Oak)
Sycamore (Acer
pseudoplatanus)
Mimosa (Acacia dealbata)
Judas Tree (Cercis)
New Zealand Pohutukawa Tree
(Metrosideros excelsa)
Rock rose
(Cistus creticus)
Fat hen / pigweed
(Chenopodium album)
Heliotropium europaeum
Fleabane (Erigeron sumatrensis &
Erigeron bonariensis)
Catharanthus (like vinca)
Mock Privet (Phillyrea latifolia)
Grevillea juniperina (Spider Flower)
Scented geranium
(Pelargonium
x fragrans)
Vinca (Periwinkle)
Bay Laurel (Laurus nobilis)
Commission database of host
plants found to be susceptible
to Xylella fastidiosa in the
Union territory
Continually being
added to
536 and counting

29. 29
Key risks: Xylella fastidiosa and Philaenus spumarius
What is the threat? Xylella fastidiosa is a highly damaging bacterial pathogen native to the Americas and
introduced to Europe (Italy, Spain and France).
How would/does it get here? Xylella would most likely arrive on planting material.
How does it affect UK crops? Xylella has a vast host range including Polygala, vines, lavender, rosemary and trees like
almond, ash, cherry, plums and olives. Bacteria block the xylem (water carrying) vessels
leading to dieback, leaf scorch and in some cases mortality.
Other impacts Massive economic and social impacts due to the removal of ancient olive trees in Italy
and the impacts on trade.
How quickly does it spread? It is spread by xylem feeding insects like the meadow spittlebug, and can move in trade
of asymptomatic plants.
How controllable is it? The only control option is destruction of infected plants. Vector populations can be
controlled by spraying.
Current and proposed actions Under EU legislation, all hosts within 100 metres would be destroyed and movement of
host plants controlled for 5 km for an interception, 10km in the wider environment. All
hosts must move with a plant passport.

30. Enhancing preparedness for Xylella fastidiosa
30
• Defra has funded a number of projects focussed on Xylella fastidiosa
focussed on applied research that will enhance the way we respond
to a finding of the disease:
• Improving diagnostics
• Learning more about the distribution and behaviour of potential
vectors.
• Identifying optimum methods to control vectors
• Developing new in-field data capture platforms
• Collaborating with researchers in other European countries to
learn about the efficacy of management strategies

31. New Xylella R&D
• More than £18 million through a joint bid with BBSRC focussed on bacterial
plant pathogens, and Xylella fastidiosa in particular
• BRIGIT project launched in December 2018, with a budget of more that £5
million
• Consortium made up of 10 research institutions led by
• Research focuses on remaining evidence gaps, including:
• Behaviour of the disease in key native hosts, including movement within
the plant and triggers for symptom development
• Behaviour of potential vectors
• Epidemiological modelling
• Social science
31

32. Rose rosette virus and its vector
Phyllocoptes fructiphilus
• Both RRV and P. fructiphilus are only
recorded from North America but
recent finding in India
• Rosa multiflora is particularly
susceptible to the disease, with
infection always being lethal
• Has the potential to cause large
economic, environmental and social
impacts in the UK

33. Key risks: Rose rosette virus and its vector Phyllocoptes fructiphilus
What is the threat? Rose rosette virus (RRV) is a very damaging pest and can be lethal to many species of
the genus Rosa. Rose rosette virus is spread by the microscopic mite Phyllocoptes
fructiphilus, and has the potential to cause large economic, environmental and social
impacts in the UK.
How would/does it get here? Plants for planting and cut flowers of Rosa. Two native rose species are known to be a
host of RRV (Rosa canina and R. rubiginosa)
How does it affect UK crops? RRV is a highly destructive virus and infection kills the majority of rose hosts, with.
Potential economic impacts in the UK are large as infected plants will be
unmarketable, and there may be a reduction in demand for roses if the disease
spreads.
Other impacts Economic impacts associated with the removal and replacement of roses use in public
landscaping and impacts of tourism in public gardens.
How quickly does it spread? Spread is rapid. P. fructiphilus can be dispersed on air currents, and natural spread of
the mite occurs to plants downwind of those that are infested
How controllable is it? No control methods available. No proven resistant cultivars
Current and proposed actions Exclusion and regulation, with appropriate phytosanitary measures on the import of
Rosa plants from North America. EPPO Working Party in 2018 approved for
regulation.

34. Thousand canker disease of walnut
• Infestation of the walnut twig borer
Pityophthorus juglandis spreads the
fungus Geosmithia morbida, resulting
in disease
• A significant pest of walnut in the US,
outbreaks occurred in Europe for the
first time in Italy in 2013, where it is
spreading rapidly
• New research suggests Juglans regia
(a common UK host) is as susceptible
as Juglans nigra in the US

35. Key risks: Geosmithia morbida and Pityophthorus juglandis
What is the threat? Geosmithia morbida is introduced to the UK alongside its vector, the walnut twig borer.
How would/does it get here? Eggs, larvae and adults travel in non-squared wood, bark, wood packaging material or
plants for planting. As the pest is already established in Italy, natural spread to the UK
is a possibility.
How does it affect UK crops? Repeated infestations on the same host spread Geosmithia morbida throughout the
host, resulting in thousand cankers disease and significant host mortality of walnut
species
Other impacts Light infestations limit growth of the host
How quickly does it spread? The vector is capable of flying long distances. It has spread over 100km within two
years in Italy
How controllable is it? There are no effective treatments. The only current effective control to prevent spread
is tree destruction.
Current and proposed actions Statutory action would be taken on findings in the UK. The vector is subject to
extensive surveying in Italy.

36. Ambrosia beetle: Polyphagous Shot Hole Borer
(Euwallacea sp.) and Fusarium euwallaceae
• Spread through trade from its origin in
Vietnam to the USA, Israel and most
recently South Africa
• Larval burrows created by PSHB spread F.
euwallaceae throughout the host, leading to
mass build up of the fungi, clogging of
xylem vessels and characteristic ‘sugar
volcanoes’ form on the surrounding stem
galleries
• Very wide host range of broadleaved trees,
the most important UK host is oak.
• Avocado production is threatened

37. Key risks: Euwallacea sp. and Fusarium euwallaceae
What is the threat? Polyphagous Shot Hole Borer is introduced alongside Fusarium euwallaceae, causative
agent of Fusarium dieback
How would/does it get here? Import of plants for planting of the wide host range of this pest, movement with squared
and unsquared wood and wood packaging material.
How does it affect broadleaved trees? The ambrosia beetle introduces the pathogen throughout trunk and stems of the host,
this results in the clogging of the vascular tissues, necrosis and significant dieback.
Other impacts Avocado production in Israel is under threat from the beetle/pathogen, with incidence
rates reported of up to 100% in growing regions and significant crop losses. In South
Africa a large number of tree species have been attacked
How quickly does it spread? In Israel natural spread is reported to be between 10 and 20km a year. The wide
distribution in California is believed to be the result of multiple introduction events.
How controllable is it? The cryptic nature of the pest (it is very small) and very wide host range mean
identification, and eradication, are very difficult to achieve.
Current and proposed actions Watching brief needed on pest spread into areas with cooler climates. Added to the
EPPO A2 list in 2016 after a UK PRA.

38. What can you do?
38

39. Plant Health Management Standard (PHMS)
Plant Healthy – online self assessment
Plant Health Assurance Scheme (PHAS)
Plant Health Biosecurity Steering Group
Healthy Plants, Healthy Business

40. Plant Health Management Standard
(PHMS)
Helen Bentley-Fox
Tim Edwards
Jamie Dewhurst
Ed Birchall (APHA)
Ali Wilson (APHA)
Plant Health Biosecurity
Steering Committee
Many others including
Forestry Commission,
Forestry Research
Rebecca Grant
PHAS Steering Group

41. Citizen science
41

42. The Resilience Garden Chelsea 2019
42

43. Action Oak Partnership

44. International Year of Plant Health 2020
44

45. New skills and training
45

46. UK Plant Health Information Portal
46

47. Follow me on Twitter @plantchief

48. SARAH EBERLE, AWARD-WINNING GARDEN DESIGNER
AND PETER CLAY, CROCUS
#PlantHealth

49. Shoot member since Jan 2017

50. the Resilience Garden
• The garden is a response to
the threat of climate change,
pests and diseases to our
landscapes and gardens.
The garden is inspired by
William Robinson, who was
deeply supportive
of public forestry and on his
estate (Gravetye) planted
many thousands of trees
always experimenting with
new species and ideas.
.

51. The Resilience
Garden
Rhs Chelsea
Flower Show
2019.
Supporters
The William Robinson Gravetye Charity.
Gravetye Manor Hotel and Restaurant.
Kingscote Estate.
Forestry Commission.
Defra.
Royal Botanic Gardens Kew.
Scottish Forestry.
Scottish Government.
Welsh Government.
In partnership with APHA, Observatree, Action Oak,

52. RESILIENCE GARDEN:
Rhs Chelsea Flower Show 2019.

61. RHS Plant
Health
Principles.
• 1 Provide guidance on plant health issues to
protect the sustainability of gardens and
horticulture in the UK.
• 2 Assess plant health risks prior to undertaking
activities that are likely to have phytosanitary
implications and identify what mitigations are
required.
• 3 Adopt practices across RHS activities that
minimise plant health risk, while balancing that
risk with horticultural benefit.

62. RHS Plant
Health
Principles
• 4 Prioritise and undertake research to generate
the knowledge necessary to manage plant
health risks to UK horticulture.
• 5 Communicate and exchange knowledge to
enable informed decisions to be made to
manage plant health risks to UK horticulture.
• 6 Work collaboratively, internally through the
RHS Plant Health Working Group and with
external organisations to contribute to the
management of plant health risks to the UK and
to help develop the skills necessary to manage
such risks.

63. RHS Retail.
• Wherever possible, continue to use UK-grown
planting material for RHS Retail.
• Develop a list of RHS-approved suppliers that
meet specified plant health criteria.
• Train staff in RHS Plant Centres in the detection
of pests and diseases.
• Intensify surveillance for pests and diseases in
RHS Plant Centres.
• Provide advice to the public in addition to
members) on how to report a new pest or
disease affecting horticultural plants.

64. RHS Gardens
• Wherever possible, continue to use UK grown
plant material.
• Use least-risk plant material (e.g. certified seed)
which is appropriate to the horticultural
application.
• Further develop plant reception capability in
RHS Gardens to meet increased challenges.
• Hold, in isolation, all imported trees in isolation
for at least 12 months prior to planting.
• Develop a list of RHS approved suppliers that
meet specified plant health criteria.
• Intensify surveillance for plant pests and
diseases in RHS Gardens.

65. RHS Shows.
• Ban plants that are particularly susceptible to
diseases caused by the bacterium Xylella, from
being exhibited at RHS Shows (unless UK sourced
and grown).
• Incorporate evaluation of plant health risk into
judging criteria for gardens at RHS Shows; provide
training for RHS judges and technical support during
judging.
• Request the Government’s Animal and Plant Health
Agency to inspect plants at principle RHS shows.
• Hold, in isolation, all imported semi-mature trees for
at least 12 months prior to use in RHS Shows
(currently 3 months).
• Review and implement plant health policies for RHS
Shows, including revision of plant health guidance,
training exhibitors and staff, review of proposed
planting lists, undertaking site inspections etc.

66. https://www.rhs.org.uk/about-
the-rhs/policies/plant-health-
policy

67. NICOLA GAMMON, SHOOT
#PlantHealth#PlantHealth

68. SHOOT
#PlantHealth
• Other industry resources
• About Shoot and our customers
• Data Science & AI innovation
• Defra Project: Plant biosecurity data now & improvements in future
• Demo videos
• Please work with us… how you can get involved.

69. OTHER RESOURCES
#PlantHealth#PlantHealth

70. #PlantHealth
What – 23 questions based on the Plant Health Management Standard
How – Create a free online account at planthealthy.org.uk
Why – help protect our businesses and industry from pests & diseases
It is designed to cover the supply chain and includes businesses such as – nurseries, retailers, landscapers,
arborists, public gardens.

71. 1
www.landscapeinstitute.org @talklandscape
Landscape Institute
launches plant health &
biosecurity toolkit
https://bit.ly/2Gb3Faw

72. OTHER PLANT BIOSECURITY INITIATIVES
#PlantHealth
What – 23 questions based on the Plant Health Management Standard
How – Create a free online account at planthealthy.org.uk
Why – help protect our businesses and industry from pests & diseases
It is designed to cover the supply chain and includes businesses such as – nurseries, retailers, landscapers,
arborists, public gardens.
1
www.landscapeinstitute.org @talklandscape
Landscape Institute
launches plant health &
biosecurity toolkit
https://bit.ly/2Gb3Faw
www.landscapeinstitute.org @talklandscape
Developed in
partnership with
• Society of Garden Designers (SGD)
• British Association of Landscape Industries (BALI)
• Association of Professional Landscapers (APL)

73. SHOOT
#PlantHealth#PlantHealth6
www.landscapeinstitute.org @talklandscape
#LICPDday
Healthy Places, Healthy Plants:
Embedding biosecurity in
landscape projects
Book now on Eventbrite
This event is an early opportunity for
landscape practitioners to come together,
share feedback on the toolkit, and discuss
the next stages of this vital area of work.

74. SHOOT
#PlantHealth#PlantHealth

75. #PlantHealth#PlantHealth

76. SHOOT OFFER NOW
2 Planting advice
Gardeners kill fewer plants with advice on right plant < > right place.
1 Design and plan
Gardeners can save
time creating plant lists
and garden plans using
our award-winning
planner.
Designers can create
professional mood
boards and planting
plans to scale using our
advanced garden
planner version for
professionals.
Designers can
collaborate all wrapped-
up in their own
branding.
3 Care calendar
Gardeners kill fewer plants
with personalised, expert
monthly to do lists direct to
your email inbox.
Designers can offer as a
valuable extra service to
their clients.
Retailers can provide
scalable, expert plant care
advice to their customers for
the plants they buy.
#PlantHealth
26,000 plants + growing

77. #PlantHealth#PlantHealth

78. TENDERCARE NURSERIES VIDEO
#PlantHealth#PlantHealth

79. #PlantHealth#PlantHealth

80. DATA AND AI INNOVATION
#PlantHealth#PlantHealth

81. DATA AND AI CHALLENGE
Defra data
• Species / variety level
• Genus level
• Family
• ‘broad-leaved trees’ / ‘woody plants’
Tendercare Nurseries
• Truncated names to fit onto
plant labels
Other retailer:
Extra text (e.g. 9cm pot)
Other retailer:
Genus or group level e.g.
‘Mixed clematis’ or ‘Mixed
bulbs’
#PlantHealth#PlantHealth

82. DEFRA < > SHOOT
RISK REGISTER DATA PROJECT
#PlantHealth#PlantHealth

83. DEFRA RISK REGISTER
1040 risks listed in total
Mitigated ratings: ‘likelihood’ and ‘impact’ ratings for each
Risks are rated 1-5 (1=low, 5=high)
Hosts: Species, Families and Genera and other e.g. ‘woody plants’ and ‘all
broadleaved trees’
#PlantHealth#PlantHealth

84. INITIAL MATCHING TO DEFRA
On initial match some Shoot plants had 53 invasive risks e.g. Prunus
#PlantHealth#PlantHealth

85. HIGHEST RISK ONLY
#PlantHealth#PlantHealth
Mitigated impact 3 + and in Shoot = 290 risks

86. TOP 3 PER PLANT
Some plants still had 19 risks e.g. potato. So risks were then also ordered by impact highest
to lowest, and when the impact is the same, they are further ordered by likelihood.
#PlantHealth#PlantHealth
Plant
Scientific
Name Likelihood Impact To Display
acaena
microphylla
Margarodes
vitis 2 5 yes
acaena
microphylla
Hoplolaimus
spp. 2 4 yes
acaena
microphylla
Orgyia
thyellina 3 3 yes
acaena
microphylla
Choristoneura
rosaceana 2 3 no

87. 15,965 SHOOT PLANTS ‘IN’ RISK REGISTER
10,191 SHOOT PLANTS ‘NOT IN’ RISK REGISTER
#PlantHealth#PlantHealth

88. DEFRA – PHASE ONE
#PlantHealth#PlantHealth

89. #PlantHealth
NEW – PLANT SEARCH FILTER
#PlantHealth

90. #PlantHealth
NEW – SEARCH RESULTS
#PlantHealth

91. #PlantHealth
NEW – DEFRA RISKS IN PLANT PAGES
#PlantHealth

92. #PlantHealth
WHO TO CONTACT PAGE
#PlantHealth

93. #PlantHealth
FORUM
#PlantHealth

94. DEMO DEFRA DATA
#PlantHealth#PlantHealth

95. #PlantHealth#PlantHealth

96. DEFRA – FUTURE
#PlantHealth#PlantHealth

97. #PlantHealth
UPDATING & IMPROVING DATA
#PlantHealth
Time stamp
Pest ID pages
with photos
and more
information
+ Process for newly added plants
Automated
updates

98. #PlantHealth
CARE CALENDAR
#PlantHealth
Pest & Disease ‘to-dos’
Pest & Disease

99. COMMENTS / FEEDBACK?
#PlantHealth#PlantHealth

100. #PlantHealth
GARDEN DESIGNERS
#PlantHealth
ü If you are garden designer but not yet a member of Shoot – Book a
demonstration using this Calendly booking form: calendly.com/shoot/online-
demonstration-of-shoot

101. #PlantHealth
RETAILERS / PLANT NURSERIES
#PlantHealth
ü If you are a plant nursery or garden retailer and interested to learn more
about what Shoot can offer, please use this form: https://bit.ly/2YVj5Hn

102. #PlantHealth
INVESTORS
#PlantHealth
ü If you are interested being an investor in Shoot, we are soon going to
looking for more investment, so please contact Nicola using this form:
https://bit.ly/2WY9RbJ

103. THANK YOU
#PlantHealth#PlantHealth

104. TENDERCARE
#PlantHealth#PlantHealth

105. SPEAKER Q & A
#PlantHealth#PlantHealth
Biosecurity Event 16th April 2019

106. The benefits of working
together
Tendercare's customer can benefit from Shoot’s plant care
calendar giving the customer a huge helping hand taking
care of their purchase.
Tendercare can continue to grow the relationship with the
customer by keeping the interaction going well after the
purchase.

107. Biosecurity Measures taken by the Nursery
Plant Passports
Tendercare only imports plants from
nurseries that are able to provide a
valid plant passport. Each
consignment delivered to
customers by Tendercare comes
with paperwork which has
Tendercare's plant passport number
attached.
Phytosanitary Certificates
Where we export to a country
outside the EU we will have the
plants inspected and transport the
plants with their phytosanitary
certificate. Where we import plants
from outside the EU, we will ensure
they have a phytosanitary
certificate and that the plants travel
with that phytosanitary certificate.
Notifiable P & D (applies to wide
range of trees and shrubs)
Where we find any notifiable pests
and diseases either at the goods in
stage or when the plants are being
grown we will immediately notify
the Plant Health and Seeds
Inspector and quarantine the
plants.
Other Statutory Schemes
Tendercare complies with the Eu
Tree Notification Scheme, where we
notify APHA through the eDomero
platform of any Castanea, Fraxinus,
Pinus, Platanus, Olea, Quercus and
Ulmus plants that are imported from
the EU so that they may be
inspected.

108. Why do we buy plants from Europe?
MANY OF OUR
MATURE TREES ARE
ORNAMENTAL, NON
NATIVE TREES SUCH
AS LIQUIDAMBER
AND GINKGOS,
PRODUCED BY
HIGHLY SKILLED
SPECIALIST
GROWERS IN SOILS
IDEAL FOR THESE
VARIETIES SUCH AS
THE GERMAN TREE
NURSERY LORBURG.
THE NURSERIES WE
DEAL WITH ARE ALL
COMMERCIAL
GROWERS AND ARE
SUBJECT TO THE
SAME EU
PHYTOSANITARY
INSPECTIONS AND
REGULATIONS THAT
WE ARE SUBJECT TO.
TENDERCARE ONLY
IMPORT FROM
NURSERIES IN EU
COUNTRIES THAT ARE
ABLE TO PROVIDE A
VALID PLANT
PASSPORT.
WE NOTIFY OUR
DELIVERIES TO DEFRA
THROUGH THE EU
TREE NOTIFICATION
SCHEME, WHO THEN
INSPECT IMPORTS AT
OUR NURSERY.
PLANTS WHICH MAY
HARBOUR
UNDIAGNOSABLE
INFECTIONS AT THE
TIME OF IMPORT ARE
HELD ON THE
NURSERY FOR A
RELEVANT PERIOD
TO THE LIFE-CYCLE
OF THE POTENTIAL
DISEASE OR PEST
UNTIL THEY ARE
KNOW TO BE RISK
FREE.

109. • The majority of our climbers, herbaceous and 20L shrub ranges are
grown in the UK at our Beaconsfield site
• All our plants are batch coded on the label for complete traceability.
• We were one of the first UK nurseries to start this system in the early 90’s.
• New for 2019 – we will indicate all plants which have been growing on
the nursery for over a year.
Do we grow any of our plants in the UK
YES!

110. • We check our Plant Health Management Policy Document against Industry
recommendations such as the Plant Healthy programme set up by the HTA.
• We scored highly doing this self test – 91% with 2 recommendations:
1. We took away advice on identifying out of the weeds we eradicate which
harbour vectors associated with notifiable diseases.
2. We aim to improve communicating the Biosecurity steps we are taking to our
customers.

111. Not considered a
biosecurity risk but still a
problem….

112. Biocontrol Success story
Buxus sempervirens
We spray for the Box tree caterpillars Cydalima
perspectalis between March and October with
Dipel which contains Bacillus thuringiensis var.
kurstaki. The moths lay eggs on the underside of
the leaves, which become larvae which after
pupating become a caterpillar
Last year we had no evidence of the caterpillar
on our Buxus (hence them looking so fabulous)
and gardens we have treated in the same way,
in an area ravished by the caterpillar, stand out
with healthy Buxus, like an oasis.
It would make an excellent research study to
investigate Dipel’s use against processionary
moth.

113. Route path showing activities
connected with plan health

114. CLOSE AND THANK YOU
#PlantHealth#PlantHealth