|
North Devon Branch DBKA Winter Losses Report
Population size 100 members
Sample size 30 members (30%)
Represents total number of hives of 175
Mean number of hives per member 5.83 (range 1 hive to 30 hives)
Total lost colonies 48 (represents 27.4% of total number of colonies lost over winter)
| Total hives |
Total losses |
Reasons for
loss given by beekeeper if known |
| 175 |
48
|
5 (10.40%) |
Queenlessness/failing queens of which: 4
due to beekeeper error
1 reason unknown |
2
(4.17%) |
Drone laying queen |
2
(4.17%) |
Acute chalkbrood |
1
(2.08%) |
Weakness due to acarine |
3
(6.25%) |
Nosema |
1
(2.08%) |
Died following shook swarm to get rid of
wax moth |
2
(4.17%) |
Late swarms |
22
(45.83%) |
Starvation of which: 11 due to
robbing (mainly wasps)
8 due to beekeeper error (not checking & then feeding)
2 due to bees not feeding (stores available)
1 due to stores having crystallised (ivy suspected) |
3
(6.25%) |
Varroa (had been treated but assume
resistant - not checked for) |
1
(2.08%) |
Condensation due to solid floor |
6
(12.50%) |
Reason unknown |
Figures in RED are
a percentage of total losses (& they don’t quite add up to 100% because of
figures being rounded to 2 places) |
