3. tree health event june 2013 ben jones pr update
TRANSCRIPT
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Phytophthora ramorum Update
Ben Jones Plant Health Operations Manager FC England
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2012 Survey Summary
• 170 flying hours covering around 24,000 miles
• 79,058 Ha of larch surveyed across England, Wales, Scotland, N Ireland & IOM (increase in around 10,000 Ha compared to 2011)
• Equates 70% of all larch that has been analysed across the UK both on respective PFEs and in PW
• In England this resulted in increased investigations of 597 sites (compared to 455 in 2011) which in turn lead to the issuing of 163 Statutory Notices (compared to 120 in 2011)
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2012 Survey Summary
• Observation of disease dynamics continue to be different in different parts of the country – the more larch, the bigger the problem
• Significant new findings in SW Scotland, significant increase in S Wales, limited new findings in the Forest of Dean and SE England
• Weather conditions have been extremely conducive for Pr throughout 2012 – likely to see further infection
• Further findings generally being made in association with known infected sites (both rhodo & larch), but rapid advance of symptoms in some locations were observed over the summer
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2012 Surveillance
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2012 Surveillance
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2012 Surveillance
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Symptom Progression June 2011
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Symptom Progression June 2012
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2012 Surveillance
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2012 Surveillance
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2012 Observations
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2012 Survey Summary
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2012 Survey Summary
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2010 SW England
DISTRIBUTION OF LARCH FROM 2010 INFECTIONS
0
1000
2000
3000
4000
5000
6000
7000
8000
2010 Infected 0-2km 2-5km 5-10km >10km
He
ctare
s
Uninfected Larch Infected Larch
Total Area of Larch = 10,650 ha Infected area in 2010 = 1,261 ha (12%)
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2012 Survey Summary
SW ENGLAND - PROXIMITY OF NEW INFECTIONS TO EXISTING INFECTIONS
0
1000
2000
3000
4000
5000
6000
7000
8000
2010 Infected 0-2km 2-5km 5-10km >10km
He
ctare
s
Uninfected Larch Infected Larch
Total Area of Larch = 10,650 ha Infected area in 2012 = 2,073 ha (19%)
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2012 Survey Summary
SW ENGLAND - PHYTOPHTHORA STATUS ON LARCH AT END OF 2012
0.0
500.0
1000.0
1500.0
2000.0
2500.0
3000.0
3500.0
4000.0
4500.0
Devon
Glouce
ster
shire
Corn
wall
Som
erse
t
Wilt
shire
Dorse
tNor
th S
omer
set
Plym
outh
Sout
h Glo
ucs
Bath
& N
E So
mer
set
Torb
ay
He
cta
res
Uninfected Larch Infected Larch
54%
18%
23%
6%
6%
5%
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
• Cold spring delayed start of aerial surveillance by nearly 4 weeks
• Flights started in England and Wales in the 10th May, 4 flights undertaken so far, 2 in Wales and 2 in England.
• FC Scotland undertaking their own surveillance this year, flight started 22nd May
• Flights undertaken to the Lake District and Wales last week, and along the South Coast and to E Anglia this week
2013 Surveillance
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
2013 Surveillance SW England
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
2013 Surveillance SW England
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
2013 Surveillance SW England
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
2013 Surveillance SW England
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
2013 Surveillance S Wales
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
2013 Surveillance S Wales
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Phytophthora ramorum symptom progression on infected larch stands
in the UK
2013 Surveillance S Wales
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2013 So Far……….
• Observations in general haven’t been good…highlighting further the pattern of the more larch, the bigger the problem once infection becomes established
• Significant but manageable findings in the SW, but the scale of infection in S Wales will lead to unprecedented logistical challenges with the potential for collateral damage to other species both in and out of the forest / woodland environment
• Observations continue to highlight that early detection and prompt action is still the most effective way of managing the disease across hosts species including rhododendron