observe the flight activity at different altitudes, geographical areas and habitats. â get knowledge of the ... Flying
About the overwintering ability of Drosophila suzukii in South Tyrol
F. N. Zerulla, S. Schmidt, M. Streitberger, C. P. W. Zebitz, R. Zelger
Introduction Pattern of damage & morphology •
Drosophila suzukii (SWD) infests healthy, ripe and soft‐skinned fruits of wild and cultivated plants
•
Mechanical damage of fruits by: •
Ovopositor
•
Feeding of the larvea
•
Secondary infections by other noxious insects & rotting pathogens
Introduction Pattern of damage & morphology •
Drosophila suzukii (SWD) infests healthy, ripe and soft‐skinned fruits of wild and cultivated plants
•
Mechanical damage of fruits by: •
Ovopositor
•
Feeding of the larvea
•
Secondary infections by other noxious insects & rotting pathogens
Introduction • First recordings of SWD in South Tyrol in August 2010 • Start of the monitoring program in 2011 at 30 locations (60 traps): observe the flight activity at different altitudes, geographical areas and habitats get knowledge of the SWD’s phenology in South Tyrol a
Introduction • First recordings of SWD in South Tyrol in August 2010 • Start of the monitoring program in 2011 at 30 locations (60 traps): observe the flight activity at different altitudes, geographical areas and habitats get knowledge of the SWD’s phenology in South Tyrol a
Introduction • First recordings of SWD in South Tyrol in August 2010 • Start of the monitoring program in 2011 at 30 locations (60 traps): observe the flight activity at different altitudes, geographical areas and habitats get knowledge of the SWD’s phenology in South Tyrol a
Introduction Characterizing three locations that showed high captures in autumn • Get knowledge of the factors for a successful overwintering of SWD • Find a correlation between: overwintering localities climatic conditions reproductive disposition Schlossleiten
Barbian
Kurtatsch
Introduction Characterizing three locations that showed high captures in autumn • Get knowledge of the factors for a successful overwintering of SWD • Find a correlation between: overwintering localities climatic conditions reproductive disposition Schlossleiten
Barbian
Kurtatsch
Material & Methods Microclimatic data recordings • Investigation started in autumn 2013 at 3 locations in the forest at Schlossleiten (300 m a.s.l.) in the forest at Barbian (900 m a.s.l.) on a blackberry bush at Kurtatsch (200 m a.s.l.) • Hourly recordings of: air temperature (50‐100 cm above ground) and relative humidity by dataloggers temperature underneath leaf litter by handcraft waterproof thermo sensors
Material & Methods Microclimatic data recordings • Investigation started in autumn 2013 at 3 locations in the forest at Schlossleiten (300 m a.s.l.) in the forest at Barbian (900 m a.s.l.) on a blackberry bush at Kurtatsch (200 m a.s.l.) • Hourly recordings of: air temperature (50‐100 cm above ground) and relative humidity by dataloggers temperature underneath leaf litter by handcraft waterproof thermo sensors
Results & Discussion Flying activity and climatic data (23.12.’13 – 13.03.’14) Kurtatsch
Schlossleiten
1000
10000 9000 8000
4000
Week
♂
♀
Week
♂
13
9
11
7
5
3
1
51
0 49
0
47
1000 45
100
43
2000
27
200
41
3000
39
300
5000
37
400
6000
35
500
7000
33
600
31
700
29
800
D. suzukii/Week
D. suzukii/Week
900
♀
Barbian 1000
D. suzukii/Week
900
•
Schlossleiten: peak of the flying activity in the week after first frost period
•
Kurtatsch & Barbian: no flying activity after first frost period
800 700 600 500 400 300 200 100 0
Week
♂
♀
Results & Discussion Flying activity and climatic data (23.12.’13 – 13.03.’14) Kurtatsch
Schlossleiten
1000
10000 9000 8000
4000
Week
♂
♀
Week
♂
13
9
11
7
5
3
1
51
0 49
0
47
1000 45
100
43
2000
27
200
41
3000
39
300
5000
37
400
6000
35
500
7000
33
600
31
700
29
800
D. suzukii/Week
D. suzukii/Week
900
♀
Barbian 1000
D. suzukii/Week
900
•
Schlossleiten: peak of the flying activity in the week after first frost period
•
Kurtatsch & Barbian: no flying activity after first frost period
800 700 600 500 400 300 200 100 0
Week
♂
♀
Results & Discussion Flying activity and climatic data (23.12.’13 – 13.03.’14) Comparison of temperature underneath leaf litter 1800
