Arthropod Management Tests 2011, Vol. 36
doi: 10.4182/amt.2011.E61
E61
POTATO: Solanum tuberosum L., ‘Russet Burbank’
EVALUATION OF SYSTEMIC INSECTICIDES FOR THE CONTROL OF COLORADO POTATO BEETLE, POTATO
LEAFHOPPER, AND APHIDS IN POTATO, 2010
Russell L. Groves
University of Wisconsin-Madison
Entomology Department
1630 Linden Drive
Madison, WI 53706
Phone: 608-262-3229
Fax: 608-262-3322
Email: groves@entomology.wisc.edu
Scott Chapman
Phone: 608-262-9914
Email: chapman@entomology.wisc.edu
Sarah Schramm
Email: seschramm@wisc.edu
Colorado potato beetle (CPB): Leptinotarsa decemlineata (Say)
Potato leafhopper (PLH): Empoasca fabae (Harris)
Aphids: None
The objective of this experiment was to assess the efficacy of in-furrow insecticides applied at-planting to control CPB, PLH, and
potato colonizing aphid species in potatoes. The trial consisted of 23 treatments arranged in a RCBD with four experimental
replicates. Potatoes were planted on 28 Apr 2010 at the University of Wisconsin’s, Hancock Agricultural Research Station (HARS)
near Hancock, WI. Plots were 2 rows wide and 20 ft (6.1 m) long with unplanted guard rows on either side ore experimental plots.
Rows were planted on a 3 ft row center (0.9 m) with 12 inches (0.3 m) between plants, in an 8 tier field design with 12 ft (3.7 m)
alleys between tiers. All in-furrow treatments were applied in 1.1 L of water at 9.1 gpa on 28 Apr 2010 using a single nozzle boom
equipped with an XR8002VS flat fan spray tip powered by a CO2 backpack sprayer at 30psi. Furrows were cut using a commercial
potato planter without closing discs attached. Seed treatments were applied in 0.15 L of water on 27 Apr 2010 using a single nozzle
boom applying 9.1 gpa equipped with an XR8002VS flat fan spray tip powered by a CO2 backpack sprayer at 30 psi. Immediately
after the treatments were applied over top of seed pieces, and all seed treatments were placed in open furrows, all seed was covered.
In-furrow applications on 28 Apr occurred between 12:00 - 14:30 hours and application conditions were recorded as a southeast wind
at 5 mph (8.1 kph), 64o F (17.8o C) air temperature, 62% RH, under mostly cloudy conditions with a 3 inch (7.6 cm) soil temp at the
time of application of 59° F (15.0o C). All plots were maintained according to standard commercial practices. Stand counts were
conducted on 20 May (22 DAP) by counting the number of emerged plants per 20 ft. section of row. Control of CPB was assessed by
counting the number of adults (AD), egg masses (EM), small larvae (SL), large larvae (LL) and percent defoliation (%DF) on 10
plants in each plot. Control of PLH was assessed by counting the number of nymphs (NY) and adults (AD) on 10 plants in each plot.
Control of aphids was assessed by counting the number of aphids on 10 plants in each plot. Insect counts occurred on several dates
throughout the summer, and means are reported as averages over dates. Experimental plots were mechanically harvested from a single
row of the two-row plots and weighed and graded at the HARS. Count data were log10 transformed prior to analysis. Means were
separated using ANOVA with a Fisher’s Protected LSD at the 0.05 level of significance.
Populations of CPB were considered average to above average in this potato field trial as defoliation in the UTC plots was nearing
10% by the time the initial foliar applications were applied in mid-Jun. Significant treatment effects with the DPX HGW86 5.22FS
seed and in-furrow treatments, Belay 2.13SC seed treatments, AdmirePro 4.6FS pre-mixes were observed relative to the untreated
control including CPB larvae and % defoliation. All treatments except the DPX HGW86 alone provided effective control of PLH
adults and nymphs. All treatments resulted in significantly higher tuber yields than the untreated control plots. No signs of
phytotoxicity were observed.
1
Arthropod Management Tests 2011, Vol. 36
doi: 10.4182/amt.2011.E61
Mean count / plant, averaged over dates in parentheses
Chemical
1
Untreated Control
DPX-HGW86 5.22 FS
DPX-HGW86 1.67 SC
DPX-HGW86 1.67 SC
AdmirePro 4.6 FS
AdmirePro 4.6 FS
Belay 2.13 SC
Belay 2.13 SC
Moncoat 7.5 SS
Control
DPX-HGW86 1.67 SC
DPX-HGW86 5.22 FS
DPX-HGW86 5.22 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
DPX-HGW86 5.22 FS
AdmirePro 4.6 FS
DPX-HGW86 5.22 FS
AdmirePro 4.6 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
AdmirePro 4.6 FS
AdmirePro 4.6 FS
Cruiser 5 FS
Cruiser 5 FS
-
-
Rate
Application
4.56 fl oz/a
10.3 fl oz/a
13.7 fl oz/a
7 fl oz/a
8.7 fl oz/a
12 fl oz/a
0.6 fl oz/cwt
0.75 lb/cwt
0.62 fl oz/cwt
0.16 fl oz/cwt
0.22 fl oz/cwt
0.16 fl oz/cwt
0.16 fl oz/cwt
0.22 g/100 kg
0.16 fl oz/cwt
0.16 fl oz/cwt
0.08 fl oz/cwt
0.16 fl oz/cwt
0.26 fl oz/cwt
0.22 fl oz/cwt
0.26 fl oz/cwt
0.22 fl oz/cwt
0.16 fl oz/cwt
0.26 fl oz/cwt
0.35 fl oz/cwt
0.12 fl oz/cwt
0.16 fl oz/cwt
In Furrow
In Furrow
In Furrow
In Furrow
In Furrow
In Furrow
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
P
LSD
CPB-Ad
(Jun 2, 7)
CPB-EM
(Jun 2, 7)
CPB-SL
(Jun 2, 7, 14)
CPB-LL
(Jun 14, 22, 29)
%DF
(Jul 8, 15)
46.4
20.6
21.1
26.6
18.1
20.7
19.9
16.9
4.8a-c
1.8c-g
3.1a-d
1.7c-g
2.0a-f
2.0b-g
0.9fg
1.1d-g
55.5b
2.6c-e
3.8c-e
4.2c-e
8.3cd
10.8c-e
0.3e
3.2de
56.2ab
1.2c-e
10.7c-e
2.2c-e
7.2c-e
14.5c-e
0.7e
0.8de
62.5a
7.9cd
10.8cd
9.3cd
13.8cd
9.2cd
5.0d
13.8cd
45.1
20.0
26.1
21.4
12.5
6.3ab
3.2a-c
2.9b-g
2.8a-e
0.8e-g
72.8a
10.9cd
8.5cd
8.7cd
7.9c-e
61.5a
9.3c-e
14.2bc
9.0c-e
11.0c-e
36.7b
10.8cd
15.8c
10.5cd
7.9cd
18.7
0.5g
12.2c-e
7.2c-e
13.5cd
17.6
1.1c-g
15.6cd
18.3cd
16.7c
16.3
1.2c-g
26.6c
11.7c-e
11.3cd
31.8
0.9d-g
7.7c-e
7.2c-e
15.8c
23.5
17.2
14.7
20.1
14.1
11.2
5.2a
0.5g
0.8d-g
1.3d-g
1.3d-g
0.6fg
9.0c-e
7.2c-e
8.7cd
32.5cd
20.1cd
7.8c-e
19.2bc
8.1c-e
7.1c-e
11.5c-e
7.6c-e
9.0c-e
12.1cd
10.9cd
16.7c
15.8c
11.9cd
12.5cd
<.0001
0.5616
<.0001
0.9689
0.0004
0.9529
0.6643
0.8871
<.0001
0.1474
Means in columns followed by the same letter are not significantly different (Fisher’s Protected Least Significant Difference Test,
P = 0.05).
1
All treatments except Control and Dipel had MSO 100% MS at 0.25 % v/v
2
Arthropod Management Tests 2011, Vol. 36
doi: 10.4182/amt.2011.E61
Table 1. (con’t)
Mean count / 10 plants, averaged
over dates in parentheses
Chemical
Control
DPX-HGW86 5.22 FS
DPX-HGW86 1.67 SC
DPX-HGW86 1.67 SC
AdmirePro 4.6 FS
AdmirePro 4.6 FS
Belay 2.13 SC
Belay 2.13 SC
Moncoat 7.5 SS
Control
DPX-HGW86 1.67 SC
DPX-HGW86 5.22 FS
DPX-HGW86 5.22 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
DPX-HGW86 5.22 FS
AdmirePro 4.6 FS
DPX-HGW86 5.22 FS
AdmirePro 4.6 FS
DPX-HGW86 5.22 FS
Titan ST 5 FS
AdmirePro 4.6 FS
AdmirePro 4.6 FS
Cruiser 5 FS
Cruiser 5 FS
Rate
-
-
4.56 fl oz/a
10.3 fl oz/a
13.7 fl oz/a
7 fl oz/a
8.7 fl oz/a
12 fl oz/a
0.6 fl oz/cwt
0.75 lb/cwt
0.62 fl oz/cwt
0.16 fl oz/cwt
0.22 fl oz/cwt
0.16 fl oz/cwt
0.16 fl oz/cwt
0.22 g/100 kg
0.16 fl oz/cwt
0.16 fl oz/cwt
0.08 fl oz/cwt
0.16 fl oz/cwt
0.26 fl oz/cwt
0.22 fl oz/cwt
0.26 fl oz/cwt
0.22 fl oz/cwt
0.16 fl oz/cwt
0.26 fl oz/cwt
0.35 fl oz/cwt
0.12 fl oz/cwt
0.16 fl oz/cwt
Application
PLH-AD
PLH-NY
(Jul 8, 15) (Jul 8, 15)
Aphids
(Jul 8, 15)
In Furrow
In Furrow
In Furrow
In Furrow
In Furrow
In Furrow
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
Seed Trt
1.1d-f
2.5a
2.7ab
2.0a-d
0.8f-i
0.6f-i
0.3hi
2.1f-i
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.2
0.2
0.5
0.1
0.3
0.3
0.0
0.0
1.2d-f
2.0a-c
2.2ab
1.3c-f
0.2i
0.0
0.0
0.0
0.0
0.0
0.1
0.5
0.5
0.2
0.1
0.4hi
0.0
0.1
1.1d-f
0.0
0.3
0.8f-i
0.0
0.0
1.0d-g
0.0
0.2
1.6b-e
0.4g-i
0.9e-h
0.9e-h
0.2i
0.4hi
0.0
0.0
0.0
0.0
0.0
0.0
0.1
0.0
0.0
0.3
0.2
0.0
P
LSD
<.0001
0.3224
0.4777
0.0169
0.3572
0.198
Means in columns followed by the same letter are not significantly different (Fisher’s Protected
Least Significant Difference Test, P = 0.05).
1
All treatments except Control and Dipel had MSO 100% MS at 0.25 % v/v
3