A fast growing problem
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description
A fast growing problem. How can we stop SHB spread?. Honey bee stock. Entrance Reducers. Do entrance reducers affect SHB invasion?. Hood, M. 2004. Bee World 51-59. Ellis, J. et al. 2003. J. Econ. Entomol. 1647-1652. Timeline of Measurements. Introduced entrance reducers in half - PowerPoint PPT Presentation
Transcript of A fast growing problem
A fast growing problem
How can we stop SHB spread?
Entrance Reducers
Honey bee stock
Hood, M. 2004. Bee World 51-59.
Do entrance reducers affect SHB invasion?
Ellis, J. et al. 2003. J. Econ. Entomol. 1647-1652.
Apr
il 15
Apr
il 30
May
15
May
30
June
15
June
30
July
15
July
30
Aug
ust 1
5
Aug
ust 3
0
Sept
embe
r 15
Sept
embe
r 30
Oct
ober
15
Oct
ober
30
Nov
embe
r 15
Timeline of Measurements
Recorded # SHB, # frames adult bees, # frames brood & removed all SHB
Introduced entrance reducers in half
of the colonies and removed all SHB
in all colonies
Madeuniform
packages
Colonies with entrance reducers
9 Italian colonies
9 Russian colonies
Colonies with regular entrances
9 Italian colonies
8 Russian colonies
Do entrance reducers affect SHB invasion?No overall effect, p=0.1596
0
4
8
12
16
20
Without Reducer With Reducer
Avg
. # S
HB
0
10
20
30
40
50
July 25 August 1 August 15 November 10
Avg
. # S
HB
Without Reducer With Reducer
Do entrance reducers affect SHB invasion?
p=0.5381
p=0.1994
p=0.1308
p=0.4435
0
4
8
12
16
20
Bees Brood
Avg
. # F
ram
es
Without Reducer With Reducer
What about other colony factors?
p=0.3847
p=0.5591
0
4
8
12
16
20
I tal ian Russian
Avg
. # S
HB
a
b
Does honey bee stock affect SHB invasion?Overall effect, p=0.0176
0
10
20
30
40
50
60
July 25 August 1 August 15 November 10
Avg
. # S
HB
I tal ian Russian
a a
a
b b
b
Does honey bee stock affect SHB invasion?
p=0.0255
p=0.3204
p=0.0280
p=0.0207
0
4
8
12
16
20
Bees Brood
Avg
. # F
ram
es
I tal ian Russian
p=0.2708 p=0.9257
What about other colony factors?
What do we know at this point? Entrance reducers
Honey bee stock
Continuing research
