SIR Results
Orchard Fruit Quality
The 2008 SIR Program goal was to control the
codling moth population to a level at which damage from
the pest was less than 0.2% of the harvested fruit, on
at least 90% of all commercial orchard acreage within
the Program service area. The
Program came very close to
achieving that goal.
Zone 1 had both the largest number of acres under
production in 2008, and the largest number of acres with
low codling moth damage. Zones 2 and 3 performed
slightly less well - a result that is explained, in
part, by the fact that sterile insect release did not
begin in these zones until 2003.
The following two figures show the 2008 results in
detail and the end of season results for all three zones
since 2001.
Orchard Fruit Damage: 2008 Results
|
|
|
< 0.2% Damage
|
< 0.5% Damage
|
|
Zone
|
Acres
|
Acres
|
%
|
Acres
|
%
|
|
1*
|
4007
|
3925
|
98.0
|
3980
|
99.3
|
|
2
|
3491
|
2914
|
83.5
|
3184
|
91.2
|
|
3
|
1896
|
1594
|
84.1
|
1837
|
96.9
|
|
Total
|
9395
|
8433
|
89.8
|
9001
|
95.8
|
* not including Creston
2001 to 2008 Results
Percentage of Acreage with <0.2% and <0.5% of Codling
Moth Damage
|
|
Zone 1*
|
Zone 2
|
Zone 3
|
Total Area
|
|
Year
|
<0.2%
|
<0.5%
|
<0.2%
|
<0.5%
|
<0.2%
|
<0.5%
|
<0.2%
|
<0.5%
|
|
2001
|
96.8
|
98.5
|
67.8
|
78.4
|
56.1
|
72.5
|
78.8
|
86.5
|
|
2002
|
95.4
|
96.8
|
71.2
|
81.6
|
58.7
|
77.6
|
73.6
|
84.2
|
|
2003
|
94.7
|
96.9
|
30.4
|
42.2
|
21.5
|
41.9
|
62.3
|
70.8
|
|
2004
|
93.0
|
97.2
|
70.4
|
79.4
|
74.2
|
86.4
|
81.7
|
89.0
|
|
2005
|
93.3
|
97.6
|
81.0
|
87.4
|
82.3
|
92.0
|
87.1
|
93.1
|
|
2006
|
92.9
|
96.3
|
73.5
|
82.7
|
77.4
|
91.8
|
83.1
|
90.6
|
|
2007
|
98.5
|
99.1
|
71.2
|
84.3
|
85.8
|
94.8
|
85.9
|
92.8
|
|
2008
|
98.0
|
99.3
|
83.5
|
91.2
|
84.1
|
96.9
|
89.8
|
95.8
|
* not including Creston
Orchard Moth Presence
Changes in wild moth (trap) captures are another measure
that can be used to gauge the Program's
results. As part of the ongoing monitoring efforts,
thousands of pheromone traps are placed in commercial
orchards to detect moth presence.
The average number of wild moth captures and the
presence of the moths has remained relatively stable
from 2001 through 2008. This finding suggests that
existing levels of suppression are not sufficient to
further reduce codling moth prevalence. Additional
efforts are needed, either through SIR or in concert
with the Program.
Residential Results
Program success requires careful attention to
urban areas that contain host trees. Between 2001 and
2008 the number of urban properties with host trees
dropped from 16,015 to 12,270; codling moth activity on
these properties dropped from 36.2% to 10.5%.
Within 200 metres of orchards (i.e., within the buffer
zones), the number of properties with host trees dropped
from 5,163 in 2001 to 3,372 in 2008; and codling moth
activity on these properties dropped from 39.4% to
17.7%.
The following figure presents data from residential host
tree properties, comparing 2001 to 2008.
Urban Site
Comparison 2001 and 2008
Host Tree
Properties Data*
|
Year
|
Active Properties
|
BZ**Active Properties
|
Total with CM
|
Total BZ** with CM
|
|
2001
|
16015
|
5163
|
5794
|
2032
|
|
2008
|
12270
|
3372
|
1294
|
598
|
*
not including Creston
** Buffer
Zones
