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.

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 Mycotoxin contamination in maize triggered by arthropod pests and the related protection possibilities

2017 ◽  
pp. 59-64
Author(s):  
Dávid Horváth
Keyword(s):  
Climate Change ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Animal Health ◽  
Mechanical Damage ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Corn Borer ◽  
Mycotoxin Contamination ◽  
Arthropod Pests

Mycotoxin contamination in harvested maize has increased in the last decades, which can be unequivocally back to the plant health troubles caused by global warming. The increasing of wounds in maize crops was occurred by climate change both on direct (hailstorm) and indirect(newly appeared pests) ways. In additional, the settling phytopathogenic microfungi on these plant wounds inflict serious human and animal health problems.The changing of Hungarian arthropod pests assemblages stand in the background of this dangerous nuisance complex. The spreading of European corn borer (Ostrinia nubilalis Hbn.) bivoltine ecotype as well as the newly appeared adventive species [cotton bollworm Helicoverpa armigera Hbn.), western corn rootworm (Diabrotica v. virgifera LeConte), fourspotted-sapbeetle (Glischrochilus quadrisignatus Say)] in Hungary can be responsible for this situation. In total, all technological elements, which obstruct the damage of these chewing mouthparts pests, as well as moderate the mechanical damage of maize, can be contribute to the reduction of both these phytopathogens injuries and mycotoxin contaminations.

DEVELOPMENTAL ADAPTATION OF THE EUROPEAN CORN BORER (OSTRINIA NUBILALIS HÜBNER) IN ALBERTA

1987 ◽  
Vol 119 (4) ◽  
pp. 371-380 ◽  
Author(s):  
Dennis A. Lee ◽  
John R. Spence
Keyword(s):  
United States ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
The United States ◽  
Life Stages ◽  
Corn Borer ◽  
Corn Borers ◽  
Developmental Thresholds ◽  
Temperature Thresholds ◽  
Higher Temperature

AbstractTemperature effects on development were studied for two Alberta populations of Ostrinia nubilalis (Hübner), from the South Saskatchewan River valley and the surrounding plains. Lower developmental thresholds for all life stages of both Alberta populations were determined by linear regression. Thresholds for the egg stage were significantly less for plains borers (9.5°C) than for valley borers (10.8°C), and about 2°C lower than for corn borers from the United States. Thresholds in Alberta populations for the 4th (15.3°C) and 5th (14.0°C, plains) instars, and for post-diapause pupation (12.8°C), were much higher than in populations from the United States. Higher temperature thresholds delay development in Alberta populations, thus reducing midsummer pupation. Valley populations developed significantly faster than plains populations during egg development, during the prepupal period of the 5th instar, and during post-diapause pupation. These results explain why valley populations have a partial second generation in some years.

Corn Rootworm and European Corn Borer Control in Pennsylvania, 1992

1994 ◽  
Vol 19 (1) ◽  
pp. 216-216
Author(s):  
D. D. Calvin ◽  
P. B. Rebarchak ◽  
S. M. Spangler ◽  
G. W. Roth ◽  
L. Hoffman ◽  
...  
Keyword(s):  
European Corn Borer ◽  
Granular Soil ◽  
Corn Rootworm ◽  
Silt Loam ◽  
Corn Borer ◽  
Silt Loam Soil ◽  
The Press ◽  
Loam Soil ◽  
Rock Springs

Abstract Thirteen corn rootworm granular soil insecticide treatments were evaluated on a Hagerstown silt loam soil near Rock Springs, PA, during 1992. A RCBD with 5 replications was used. Insecticides and rates were applied in-furrow or as a T-band application. Plots were 39 ft × 5 ft wide (2 rows). Treatments were applied using a Max Emerge John Deere 7000® corn planter on 20 May. T-band applications were applied in 7 inch bands over the row and into the furrow ahead of the press wheel, and in-furrow applications were directed into furrow in front of the press wheel.

GENETICS OF DIAPAUSE INDUCTION AND TERMINATION IN THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), IN SOUTHWESTERN ONTARIO

1978 ◽  
Vol 110 (12) ◽  
pp. 1351-1353 ◽  
Author(s):  
D. G. R. McLeod
Keyword(s):  
Growth Rate ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Diapause Induction ◽  
Corn Borer ◽  
Female Sex ◽  
Corn Borers ◽  
Lepidoptera Pyralidae ◽  
Male Sex ◽  
Diapause Incidence

AbstractGrowth rate, diapause incidence, and diapause intensity were different in two strains of corn borers found in southwestern Ontario. Crosses between these two strains demonstrated that growth rate was female sex linked while diapause incidence was male sex linked. The effect of these two characteristics on hybridization is discussed.

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.

Sign in / Sign up

Export Citation Format

Share Document