Whos been-eating-my-strawberries-jul17

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This document summarizes a talk about the invasive spotted wing drosophila (SWD) fly and its damage to soft fruits. It describes the fly's features, global spread since the 1930s, and ability to cause 30-80% crop losses. Trapping methods are outlined for citizens to monitor local SWD populations using vinegar traps. A past citizen science project through the Quekett Microscopical Club found regional variation in SWD catches across the UK, demonstrating the value of public participation in monitoring. The talk encourages further engagement, especially from schools, to gather more data and involve more regions in tracking this pest over time.

Who‘s been eating
MY Strawberries?!
Dr Chris Thomas
Quekett Microscopical Club
www.quekett.org

Drosophila suzukii
Spotted Wing Drosophila, SWD
Suzuki
D. suzukii



30% to 80% Soft fruit crop losses
This apparently
insignificant, 3 mm
long fly is causing
dignificant damage
to soft fruit and has
recently entered the
UK in 2012

Timeline of Global Domination
Japan 1930
N.America
2012
California
2008
Spain/Italy
2008
Hawaii
1980
UK
2012

Fruit Fly/Vinegar Fly
UK Drosophila sp.
1 mm
This is the
common
version of
the fruit fly
we find in
our gardens
and homes,
buzzing
around fruit

Male SWD
Male SWD‘s are immediately recogniseable under a hand
lens, having the distinctive single black wing spots

Female SWD
The female lacks the wings spots but …

Female SWD
It sports a large, serrated, egg laying ovipositor

Damage
When you think SWD, think insect with a chainsaw that cuts into ripening
fruit and lays ist eggs inside them – then think – Millions of them!

Commercial Control of SWD
• MONITOR
• IDENTIFY
• CONTROL
– Tidiness
– Insecticide
– Parasitoids

What any Member of the
Quekett Microscopical Club
can do (and schools too!)

Our Skills
• Skilled at capturing small subjects
• Skilled at looking at small subjects
• Skilled at Recording and Sharing
information
• Members throughout UK (and world!)
• Have our own publication – The Journal

Step forward please to
• Set a Fruit fly/Vinegar Fly trap this
October
• Record your catch
• Send your results to bulletin@quekett.org
• I‘ll collate and write up the results
• You will be credited in the paper.

Population growth
From Report:
Understanding and
developing methods for
managing spotted wing
drosophila (SWD) in
the UK: Vital research
to maintain the viability
of the UK fruit
Industry
Michelle Fountain/ Jerry
Cross, East Malling
Research, New Road,
East Malling, Kent ME19
6BJ

Trapping SWD
1. Cider vinegar in plastic bottle
2. Add a drop of Fairy Liquid
3. Pierce bottle with 2-3mm
diameter holes
4. Hang in garden for 1 week
5. Pour contents into a white plastic
tub
6. Observe & record using Low
power microscope
/magnifiers/camera/smartphone

Result Format
• Send me list with the following:
– Your name and address/postcode
– Date your fly trap harvested
– Total number of insects trapped
– Number of Fruit flies/Vinegar flies
– Number of MALE SWD
– Number of FEMALE SWD

Results
• 32 locations
• 51 sets data
• Included 1 school!
• Between 0 – 100s
Fruit flies per record

SWD v
Other Fruit
flies
(%)
A. Average of numbers of fruit
flies and SWD harvested in each
region.
B. Averages of the percentage of
SWD in each harvest.
The diameter of each circle is
proportional to average SWD harvest in
each region.

Male:Female
SWD (%)
A. The total numbers of males and
female SWD harvested in each
region.
B. Averages of the percent of males
and females for each individual
harvest.
The diameter of each circle is
proportional to average SWD harvest in
each region.

Lessons Learnt
• Great participation (10% Quekett
Members)
• Regional UK Bias to Central & Eastern
England
• Reliable records
• Need more data for significant results

Future
• Repeat
• Engage The North! (And the world)
• Aim to involve schools
• Open to advice and suggestions

NEW CITIZEN SCIENCE
Following on after the conference, I was inspired to set up a
citizen science project on www.iNaturalist.org
‘The Quekett Spotted Wing Drosphila
Survey Experiment’
You are heartily invited to join in at
https://www.inaturalist.org/projects/quekett-
spotted-wing-drosophila-survey-experiment

I look forward
to
Hearing from
You!
Contact Chris Thomas
chris@miltoncontact.com, subject SWD

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Classification Metal ion ion indicators Masking and demasking reagents Estimation of Magnisium sulphate Calcium gluconate Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types- 1.Direct Titration 2.Back Titration 3.Replacement Titration 4.Indirect Titration Masking agent, Demasking agents formation of complex comparition between masking and demasking agents, Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators, Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators Instrumental Techniques-Photometry Potentiometry Miscellaneous methods. Complex titration with EDTA.

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Whos been-eating-my-strawberries-jul17

1. Who‘s been eating MY Strawberries?! Dr Chris Thomas Quekett Microscopical Club www.quekett.org

2. This is a talk about invaders!

3. Drosophila suzukii Spotted Wing Drosophila, SWD Suzuki D. suzukii  

4. 30% to 80% Soft fruit crop losses This apparently insignificant, 3 mm long fly is causing dignificant damage to soft fruit and has recently entered the UK in 2012

5. Timeline of Global Domination Japan 1930 N.America 2012 California 2008 Spain/Italy 2008 Hawaii 1980 UK 2012

6. Fruit Fly/Vinegar Fly UK Drosophila sp. 1 mm This is the common version of the fruit fly we find in our gardens and homes, buzzing around fruit

7. Male SWD Male SWD‘s are immediately recogniseable under a hand lens, having the distinctive single black wing spots

8. Female SWD The female lacks the wings spots but …

9. Female SWD It sports a large, serrated, egg laying ovipositor

10. Female SWD Ovipositor

11. Damage When you think SWD, think insect with a chainsaw that cuts into ripening fruit and lays ist eggs inside them – then think – Millions of them!

12. Commercial Control of SWD • MONITOR • IDENTIFY • CONTROL – Tidiness – Insecticide – Parasitoids

13. Gardens – Alternative Reservoirs?

14. What any Member of the Quekett Microscopical Club can do (and schools too!)

15. Our Skills • Skilled at capturing small subjects • Skilled at looking at small subjects • Skilled at Recording and Sharing information • Members throughout UK (and world!) • Have our own publication – The Journal

16. Step forward please to • Set a Fruit fly/Vinegar Fly trap this October • Record your catch • Send your results to bulletin@quekett.org • I‘ll collate and write up the results • You will be credited in the paper.

17. Population growth From Report: Understanding and developing methods for managing spotted wing drosophila (SWD) in the UK: Vital research to maintain the viability of the UK fruit Industry Michelle Fountain/ Jerry Cross, East Malling Research, New Road, East Malling, Kent ME19 6BJ

18. Trapping SWD 1. Cider vinegar in plastic bottle 2. Add a drop of Fairy Liquid 3. Pierce bottle with 2-3mm diameter holes 4. Hang in garden for 1 week 5. Pour contents into a white plastic tub 6. Observe & record using Low power microscope /magnifiers/camera/smartphone

19. Typical catch

20. Result Format • Send me list with the following: – Your name and address/postcode – Date your fly trap harvested – Total number of insects trapped – Number of Fruit flies/Vinegar flies – Number of MALE SWD – Number of FEMALE SWD

21. Results • 32 locations • 51 sets data • Included 1 school! • Between 0 – 100s Fruit flies per record

22.

23.

24. SWD v Other Fruit flies (%) A. Average of numbers of fruit flies and SWD harvested in each region. B. Averages of the percentage of SWD in each harvest. The diameter of each circle is proportional to average SWD harvest in each region.

25. Male:Female SWD (%) A. The total numbers of males and female SWD harvested in each region. B. Averages of the percent of males and females for each individual harvest. The diameter of each circle is proportional to average SWD harvest in each region.

26. Lessons Learnt • Great participation (10% Quekett Members) • Regional UK Bias to Central & Eastern England • Reliable records • Need more data for significant results

27. Future • Repeat • Engage The North! (And the world) • Aim to involve schools • Open to advice and suggestions

28. NEW CITIZEN SCIENCE Following on after the conference, I was inspired to set up a citizen science project on www.iNaturalist.org ‘The Quekett Spotted Wing Drosphila Survey Experiment’ You are heartily invited to join in at https://www.inaturalist.org/projects/quekett- spotted-wing-drosophila-survey-experiment

29. I look forward to Hearing from You! Contact Chris Thomas chris@miltoncontact.com, subject SWD

Whos been-eating-my-strawberries-jul17

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