Arthropod Management Tests 2009, Vol. 34
doi: 10.4182/amt.2009.F75
(F75)
SUNFLOWER: Helianthus annuus L., ‘Blazer Seeds 2000’, Oilseed
EFFICACY OF FOLIAR APPLIED INSECTICIDES AND ADJUVANTS AGAINST SEED-FEEDING PESTS ON
SUNFLOWER, 2007
Janet J. Knodel
North Dakota State University
Department of Entomology
202A Hultz Hall
Fargo, ND 58105
Phone: (701) 231-7581
Fax: (701) 231-8557
E-mail: [email protected]
Laurence D. Charlet
USDA, ARS
Northern Crop Science Laboratory
1307 18th St. N
Box 5677, University Station
Fargo, ND 58105-5677
Phone: (701) 239-1313
Fax: (701) 239-1346
E-mail: [email protected]
Patrick B. Beauzay
North Dakota State University
Department of Entomology
202A Hultz Hall
Fargo, ND 58105
Phone: (701) 231-7581
Fax: (701) 231-8557
E-mail: [email protected]
Banded sunflower moth (BSM): Cochylis hospes Walsingham
Red sunflower seed weevil (RSW): Smicronyx fulvus LeConte
The efficacy of insecticides and insecticide + adjuvant combinations were evaluated for control of BSM and RSW in
sunflower research plots at the North Dakota State University Prosper Research Site near Amenia. Sunflower was planted
on 14 May 2007. Plots were 4 rows wide by 25 ft long and buffered by 10 ft between plots. Rows were 30 inches wide with
plants spacing of 12 inches within rows. The experiment evaluated the efficacy of 17 different insecticide and insecticde +
adjuvant treatments, plus one untreated check in a RCB design with four replications. All treatment applications were
applied at plant growth stage R4-R5.3 on 27 Jul using a tractor mounted CO2 boom sprayer at 40 psi, 10 gpa, 30 inch nozzle
spacing, 8002 nozzles, and 18 inches over the canopy. Plots were sprayed from 8:10 a.m. to 11:30 a.m. CDT with an
average wind speed of 2.3 mph. Temperature was 68oF and relative humidity was 57%. Plots were harvested on 1 Oct by
removing at random a total of ten heads from the center two rows of the plot. Heads were dried, head diameter measured,
heads threshed individually, and seed weight per head determined. A subsample of 100 seeds per head was removed and the
percentage of seeds damaged by BSM and RSW was determined. All data were subjected to ANOVA and means were
compared using Fisher’s Protected LSD at the 5% significance level. BSM and RSW percent damage data were square root
transformed prior to analysis.
The only treatment with a significantly larger head diameter than the untreated check was Delta Gold + AG 06037 (Table
1). Percent seed damage caused by BSM was low across all treatments, and no treatments were significantly different from
the untreated check (Table 1). Percent seed damage caused by RSW was also low across all treatments, and only the high
rate of Warrior showed significantly lower damage compared to the untreated check (Table 1). The high rate of Warrior
also had a significantly higher seed weight compared to the untreated check (Table 1).
1
Arthropod Management Tests 2009, Vol. 34
doi: 10.4182/amt.2009.F75
Table 1
Chemical
Rate/acre
Check
Cobalt 30.5 EC
Cobalt 30.5 EC
Warrior 1 CS
Warrior 1 CS
Warrior 1 CS
Asana XL 0.66 EC
Mustang Max 0.8 +
b
EC + COC
Mustang Max 0.8 +
b
EC + COC
Delta Gold 1.5 EC +
Preference +
Interlock
Delta Gold 1.5 EC +
AG 06011
Delta Gold 1.5 EC +
AG 06037
Delta Gold 1.5 EC +
AG 06038
Delta Gold 1.5 EC +
AG 07010
Delta Gold +
AG 07011
Delta Gold 1.5 EC +
AG 07015
Delta Gold 1.5 EC
Delta Gold 1.5 EC
--16 fl oz
19 fl oz
2.56 fl oz
3.2 fl oz
3.84 fl oz
5.8 fl oz
4 fl oz +
1% vol:vol
3.2 fl oz +
1% vol:vol
1 fl oz +
0.25% vol:vol +
2 fl oz
1 fl oz +
6 fl oz
1 fl oz +
0.5% vol:vol
1 fl oz +
0.5% vol:vol
1 fl oz +
1 pt/acre
1 fl oz +
1 pt/acre
1 fl oz +
1 pt/acre
1.5 fl oz
1 fl oz
Head
diam
(cm)
% banded % red sunflower Seed
sunflower
seed Weevil
weight
a
a
damage
(gm/head)
moth damage
18.2bc
17.8c
19.5abc
19.7abc
19.8abc
20.1abc
20.3ab
4.9ab
3.9ab
2.3b
4.3ab
2.6b
2.8b
3.4b
2.7ab
1.5bc
1.7bc
1.6bc
1.6bc
0.6c
1.5bc
59.1b
60.0ab
69.4ab
73.2ab
67.3ab
77.3a
76.8a
19.8abc
3.2b
1.7bc
73.0ab
19.1abc
2.9b
1.9bc
64.3ab
18.3bc
3.4ab
1.3bc
65.1ab
20.1abc
2.6b
1.6bc
71.0ab
20.8a
4.5ab
2.7ab
72.8ab
20.0abc
4.2ab
1.8bc
74.1ab
20.4ab
3.1b
1.5bc
72.3ab
19.2abc
3.6ab
1.7bc
67.1ab
19.0abc
20.0abc
20.3ab
4.9ab
4.5ab
6.7a
4.4a
2.7ab
2.1b
66.5ab
65.2ab
69.1ab
Means within columns followed by the same letter are not significantly different (Fisher’s
Protected LSD; P = 0.5).
a
Data transformed using square root transformation; actual means presented in table.
b
Crop oil concentrate.
2