scholarly journals Preplant-Incorporated Insecticide Treatments to Manage Northern and Western Corn Rootworm Larvae in Eastern South Dakota, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 161-161
Author(s):  
M. A. Boetel ◽  
B. W. Fuller ◽  
J. M. Jensen ◽  
D. J. Thompson
Keyword(s):  
South Dakota ◽  
Granular Materials ◽  
Linear Models ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Feeding Damage ◽  
Insecticide Application ◽  
Corn Seed ◽  
Application Methods ◽  
Scale Data

Abstract Cornfields were chosen at Aurora and Cavour South Dakota based on corn rootworm egg and adult surveys. Therefore, offering the potential for significant larval pressures during this study. The experiment was conducted to compare efficacy of preplant-incorporation (PPI) with traditional planting-time insecticide application methods (banded or in-furrow) for controlling rootworm larvae. The PPI treatments were applied using a hand-held spray boom equipped with 4 Teejet 8002 nozzles spaced 46 cm apart. Delivery rate was 20 gpa at 25 psi while travelling at 3 mph. Immediately following liquid applications, the soil was tilled with a tandem disk harrow at a 5 to 8 cm depth for insecticide incorporation. Granular materials were applied using Noble metering units on an adapted Kinze 4-row corn planter using band or in-furrow insecticide placement methods. Metering units were calibrated on the planter prior to insecticide applications. Treatment plots (15.25 m long rows spaced 96.5 cm apart) were arranged in a RCBD with 4 replications. Band treatments were applied in an 18-cm swath in front of the furrow-closing wheels, and incorporated by the wheels and drag chains. In-furrow applications consisted of directing granules immediately between double-disk furrow openers. Pioneer TR-3751’ (100-day) corn seed was planted at approximately 23,000 kernels per acre at each location. Five roots per replicate were dug, washed, examined for feeding damage and rated using the Iowa 1 to 6 scale. Data were analyzed with SAS’s General Linear Models procedure, and means were compared using DMRT.

scholarly journals Evaluation of Planting-Time Soil Insecticide Applications for Controlling Corn Rootworm Larvae in South Dakota, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 167-167
Author(s):  
B. W. Fuller ◽  
M. A. Boetel ◽  
M. A. Catangui ◽  
J. M. Jenson ◽  
D. J. Thompson ◽  
...  
Keyword(s):  
Experimental Design ◽  
South Dakota ◽  
Linear Models ◽  
Delivery Systems ◽  
Individual Treatment ◽  
Corn Rootworm ◽  
Corn Seed ◽  
Efficacy Trials ◽  
Root Injury ◽  
Design For All

Abstract Efficacy trials were conducted at 5 locations (Aurora, Bruce, Cavour, Delmont, and Garretson) in SD. Individual treatment plots consisted of single rows, 12.2 m to 15.2 m in length, and spaced 96.5 cm apart. Experimental design for all studies was a RCB with 4 replications. Granular insecticide formulations were applied with modified Noble metering units mounted on a specially-adapted Kinze 4-row corn planter. Metering units were ground-driven, and all units were calibrated on the planter. Liquid insecticides were applied using CO2-powered delivery systems individually mounted on each row of the planter. Each system was calibrated to deliver 20 gpa. Banded insecticide treatments (granular or liquid) were applied in an 18-cm swath over the open seed furrow (T-band) in front of the furrow-closing wheels, and were incorporated by the wheels and drag chains. Infurrow treatments were placed directly between double-disk furrow openers and into the open seed furrow. Pioneer IR-3751 (100-day) corn seed was planted at a rate of 23,000 kernels per acre at all study locations. Five roots per replication were dug, washed, and rated using the Iowa 1 to 6 scale to measure rootworm larval damage. Root injury ratings were recorded and analyzed using SAS’s General Linear Models procedure, and DMRT was used to compare treatment means.

scholarly journals Control of Corn Rootworm Larvae in South Dakota Using Planting-Time Soil Insecticide Applications, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 188-188
Author(s):  
M. A. Boetel ◽  
B. W. Fuller ◽  
J. M. Jenson
Keyword(s):  
South Dakota ◽  
Block Design ◽  
Individual Treatment ◽  
Corn Rootworm ◽  
Feeding Damage ◽  
Insecticide Application ◽  
Planting Time ◽  
Application Rates ◽  
Randomized Complete Block Design

Abstract Three studies were conducted at 3 SD sites (Delmont, Garretson, and Sinai) to evaluate insecticide application rates and techniques (hand and in-furrow) for control of NCR and WCR larvae. A randomized complete block design with 4 replications was used in these studies. Individual treatment plots were single 15.25 m long rows spaced 96.5 cm apart. Insecticide granules were applied with modified, ground-driven Noble metering units mounted on a specially-adapted Kinze 4-row corn planter. Metering units were calibrated on the planter prior to insecticide applications. Banded treatments were applied in an 18 cm swath in front of the furrow-closing wheels, and incorporated by the wheels and drag chains. In-furrow applications consisted of directing granules immediately between double disk furrow openers. Corn was seeded at 23,000 kernels per acre at all locations. Five roots per replicate were dug for each treatment. Roots were then washed, examined for feeding damage, and rated using the Iowa 1 to 6 scale.

scholarly journals Cultivation and Planting-Time Insecticide Treatments for Control of Corn Rootworms in South Dakota, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 196-197
Author(s):  
B. W. Fuller ◽  
M. A. Boetel
Keyword(s):  
South Dakota ◽  
Feeding Damage ◽  
Planting Time ◽  
Corn Rootworms ◽  
Insecticide Efficacy ◽  
Scale Data

Abstract Cornfields located near New Holland and Garretson in central and eastern South Dakota, respectively, were chosen for this study. The experiment was conducted to evaluate insecticide efficacy using ground-driven Noble metering and electronic Smartbox metering units with band or in-furrow insecticide placement methods for control of northern and/or western com rootworm larvae. Treatment plots (15.2-m-long rows spaced 0.96 m apart) were arranged in a RCB design with four replications. Noble and Smartbox metering units were calibrated on the planter prior to insecticide applications. Banded treatments were applied in an 18-cm swath in front of the furrow-closing wheels, and incorporated by the wheels and drag chains. In-furrow applications consisted of directing granules immediately between double-disk furrow openers. Pioneer IR-3751 (100-day) com seed was planted at approximately 23,000 kernels per acre at each location. Five roots per replicate were dug, washed, examined for feeding damage, and rated using the Iowa 1 to 6 scale. Data were analyzed with the ANOVA procedure and means were compared using LSD.

scholarly journals Eetle Emergence From Plots Treated with Insecticides to Control Corn Rootworm Larvae in South Dakota, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 214-215
Author(s):  
M. A. Boetel ◽  
B. W. Fuller
Keyword(s):  
Experimental Design ◽  
South Dakota ◽  
Linear Models ◽  
General Linear ◽  
Individual Treatment ◽  
Corn Rootworm ◽  
Emergence Period ◽  
General Linear Models ◽  
Period Data

Abstract Sites near Aurora and Lake Andes, SD were chosen to evaluate Furadan 4F applied post-emergence to corn in comparison of at-plant applications and standard granular insecticide compounds. Insecticide treatments included at-planting applications (Counter 15G, Furadan 15G, and Lorsban 15G) using a 7 to 9 inch band, and Furadan 4F broadcast applied post-emergence at cultivation. All treatments were made at 1.0 lb(AI)/acre. Experimental design was a RCB replicated 4 times. Individual treatment plots consisted of single 50 ft long rows spaced 38 inches apart. Insecticide granules were applied with modified, ground-driven Noble metering units mounted on a specially adapted Kinze 4-row corn planter. At-plant granular treatments were banded in front of the furrow-closing wheels, and incorporated by the wheels and drag chains. Collection of these beetles were made weekly throughout the July and August peak emergence period. Data were analyzed using SAS’s General Linear Models (GLM) procedure with total emergence (per cage) means compared with DMRT.

scholarly journals Planting-Time and Rescue Applications of Furadan 4F for Control of Northern and Western Corn Rootworm Larvae in South Dakota, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 165-165
Author(s):  
B. W. Fuller ◽  
M. A. Boetel ◽  
J. M. Jenson ◽  
D. J. Thompson
Keyword(s):  
South Dakota ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Planting Time

scholarly journals Evaluation of Corn Rootworm Insecticide Treatments and Carry-Over Control of European Corn Borers in South Dakota, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 212-213
Author(s):  
M. A. Boetel ◽  
B. W. Fuller
Keyword(s):  
South Dakota ◽  
European Corn Borer ◽  
Linear Models ◽  
Larval Feeding ◽  
Corn Rootworm ◽  
Corn Borer ◽  
Corn Borers ◽  
Root Injury ◽  
Carry Over ◽  
Residual Control

Abstract A secondary benefit of corn rootworm insecticide treatments could be the residual control of European corn borer (ECB) larvae. Our study was repeated at sites near Aurora, Cavour, Delmont, and Garretson, South Dakota to assess the efficacy and secondary ECB control provided by 3 insecticides (Furadan, 60720A, & Regent). Treatment plots consisted of single 15.2 m long rows which were spaced 96.5 cm apart. The study was arranged in a RCBD with 4 replicates at each site. Granular insecticide formulations were applied with modified Noble metering units mounted on a specially adapted Kinze 4-row com planter. Metering units were ground-driven, and all units were calibrated on the planter before applications. Banded (B) insecticide treatments were applied in an 18-cm swath over the open seed furrow in front of furrow-closing wheels (T-band), and were incorporated by the wheels and drag chains. In-furrow (F) treatments were placed directly between double-disk furrow openers and into the open seed furrow. Cultivation-time liquids were applied using a CO2-powered backpack canister sprayer system equipped with a single nozzle (Teejet 8003 flat fan) hand-held boom. The system was calibrated to deliver 20 gpa. To evaluate rootworm damage 5 roots per replicate were dug for each treatment. Roots were washed, examined for corn rootworm larval feeding damage, and rated in accordance with the Iowa 1 to 6 scale. For assessment of ECB control, 10 com stalks were randomly chosen from each plot. Plants were split vertically and examined for corn borer tunneling damage. The number and length of ECB cavities were analyzed along with root injury data using SAS’s General Linear Models (GLM) procedure and means were compared by DMRT.

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