Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .
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Transcript of Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .
![Page 1: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/1.jpg)
Economic Viability of a Varroa IPM System
Keith S. Delaplane, James D. Ellis University of Georgia
www.ent.uga.edu/bees
![Page 2: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/2.jpg)
![Page 3: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/3.jpg)
Concluded
Colonies with resistant queens and screen bottoms tend to:
• Have fewer mites, especially at seasons when mite depredation is most severe,
• Have delayed onset of economic threshold.
![Page 4: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/4.jpg)
. . . and detected
Favorable compensatory interactions:
• Between resistant queens and screens,
• Between queens and screens and non-isolated apiaries.
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![Page 6: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/6.jpg)
![Page 7: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/7.jpg)
Design
![Page 8: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/8.jpg)
Design
• 2 years
![Page 9: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/9.jpg)
Design
• 2 years
• 6 beekeeper collaborators
![Page 10: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/10.jpg)
Design
• 2 years
• 6 beekeeper collaborators
• 21-30 colonies each
![Page 11: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/11.jpg)
Design
• 2 years
• 6 beekeeper collaborators
• 21-30 colonies each
• 3 treatments within apiary
![Page 12: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/12.jpg)
Design
• 2 years
• 6 beekeeper collaborators
• 21-30 colonies each
• 3 treatments within apiary– chemical: Feb and Aug chemical
![Page 13: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/13.jpg)
Design
• 2 years
• 6 beekeeper collaborators
• 21-30 colonies each
• 3 treatments within apiary– chemical: Feb and Aug chemical
– IPM: bottom screen + Russian
![Page 14: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/14.jpg)
Design
• 2 years
• 6 beekeeper collaborators
• 21-30 colonies each
• 3 treatments within apiary– chemical: Feb and Aug chemical
– IPM: bottom screen + Russian – Control: no chemical or IPM, non-selected
![Page 15: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/15.jpg)
Design
• Monitored:– Mite fall– Onset of threshold– Honey yield– Time spent working colonies– Queen loss (replaced as found)
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0
10
20
30
40
50
60
70
month
mit
es o
n st
icky
she
et (2
4 h)
s
Control
Chemical
IPM
Varroa counts, 24-h mite drop
Excluding colonies treatment threshold
2005 2006
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17 .9
1 3 .1
2 1 .3
0
1 0
2 0
3 0
4 0
C o n tr o l C h e m ic a l IP M
mit
esV a rro a c o u n ts , a v e ra g e d
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7469
94
0
10
20
30
40
50
60
70
80
90
100
Control Chemical IPM
%
Percent colonies reaching threshold at least once in two years
60 mites / 24-hr; Delaplane and Hood 1997, 1999
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33593078
3222
0
500
1000
1500
2000
2500
3000
3500
Control Chemical IPM
poun
ds2005 season honey production (pounds)
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2053
1104
660
0
500
1000
1500
2000
2500
3000
3500
Control Chemical IPM
poun
ds2006 season honey production (pounds)
![Page 21: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/21.jpg)
254226
262
0
25
50
75
100
125
150
175
200
225
250
275
300
Control Chemical IPM
seco
nds
Average time spent working colony (seconds)
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446
534
418
0
50
100
150
200
250
300
350
400
450
500
550
600
Control Chemical IPM
visi
tsTotal number colony visits
![Page 23: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/23.jpg)
40.4
33.530.4
0
10
20
30
40
50
Control Chemical IPM
hour
sTotal time spent working colonies (hours)
![Page 24: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/24.jpg)
40.4
33.530.4
0
10
20
30
40
50
Control Chemical IPM
hour
sTotal time spent working colonies (hours)
screens
31.5Colony work
![Page 25: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/25.jpg)
39
61
72
0
10
20
30
40
50
60
70
80
90
100
Control Chemical IPM
%Percent of colonies dead after 2 years
![Page 26: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/26.jpg)
46
54
48
0
10
20
30
40
50
60
Control Coumaphos IPM
% o
f col
onie
sRequeening Rate, period 1% colonies requeened, Feb-Aug 2005, n=54
![Page 27: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/27.jpg)
39
46
55
0
10
20
30
40
50
60
Control Chemical IPM
% o
f col
onie
sRequeening Rate, period 2
% colonies requeened, 2005 Aug-Apr 2006, n=33-49
![Page 28: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/28.jpg)
Conclusions
Compared to control colonies or chemical colonies, IPM colonies:
![Page 29: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/29.jpg)
Conclusions
Compared to control colonies or chemical colonies, IPM colonies:
• Compared favorably for average mite levels,
17.9
13.1
21.3
0
10
20
30
40
Control Chemical IPM
%
Varroa counts, averaged
![Page 30: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/30.jpg)
Conclusions
Compared to control colonies or chemical colonies, IPM colonies:
• Compared favorably for average mite levels,
• Compared favorably for onset of threshold,
17.9
13.1
21.3
0
10
20
30
40
Control Chemical IPM
%
Varroa counts, averaged
7469
94
0
10
20
30
40
50
60
70
80
90
100
Control Chemical IPM
%
Percent colonies reaching threshold at least once in two years
60 mites / 24-hr; Delaplane and Hood 1997, 1999
![Page 31: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/31.jpg)
Conclusions
Compared to control colonies or chemical colonies, IPM colonies:
• Had highest honey production,2053
1104
660
0
500
1000
1500
2000
2500
3000
3500
Control Chemical IPM
poun
ds
2006 season honey production (pounds)
![Page 32: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/32.jpg)
Conclusions
Compared to control colonies or chemical colonies, IPM colonies:
• Had highest honey production,
• Had highest total work hours,
2053
1104
660
0
500
1000
1500
2000
2500
3000
3500
Control Chemical IPM
poun
ds
2006 season honey production (pounds)
40.4
33.530.4
0
10
20
30
40
50
Control Chemical IPM
hour
s
Total time spent working colonies (hours)
![Page 33: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/33.jpg)
Conclusions
Compared to control colonies or chemical colonies, IPM colonies:
• Had highest honey production,
• Had highest total work hours,
• Fewest colony deaths, and
2053
1104
660
0
500
1000
1500
2000
2500
3000
3500
Control Chemical IPM
poun
ds
2006 season honey production (pounds)
40.4
33.530.4
0
10
20
30
40
50
Control Chemical IPM
hour
s
Total time spent working colonies (hours)
39
61
72
0
10
20
30
40
50
60
70
80
90
100
Control Chemical IPM
%
Percent of colonies dead after 2 years
![Page 34: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/34.jpg)
Conclusions
Compared to control colonies or chemical colonies, IPM colonies:
• Lowest queen replacement rate.
39
46
55
0
10
20
30
40
50
60
Control Chemical IPM
% o
f col
onie
s
Requeening Rate, period 2% colonies requeened, 2005 Aug-Apr 2006, n=33-49
46
54
48
0
10
20
30
40
50
60
Control Coumaphos IPM
% o
f col
onie
s
Requeening Rate, period 1% colonies requeened, Feb-Aug 2005, n=54
![Page 35: Economic Viability of a Varroa IPM System Keith S. Delaplane, James D. Ellis University of Georgia .](https://reader035.fdocuments.net/reader035/viewer/2022062421/56649cff5503460f949d1174/html5/thumbnails/35.jpg)