scholarly journals Control of Second-Generation European Corn Borer, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 212-212
Author(s):  
John Witkowski ◽  
Jerry Echtenkamp
Keyword(s):  
Experimental Design ◽  
Analysis Of Variance ◽  
European Corn Borer ◽  
Second Generation ◽  
Middle Portion ◽  
Corn Borer ◽  
Egg Masses ◽  
Dixon County ◽  
Paper Disc

Abstract Foliar treatments of registered and non-registered insecticides for second-generation European corn borer control were applied to irrigated corn plots in Dixon County, NE on 12 Aug. Liquid-formulated insecticides were applied with a Hahn Hi-Boy calibrated to deliver 17 gpa at 30 psi. Four d prior to application, 6 black-headed egg masses on paper disc were pinned to the middle portion of 10 marked com plants in each replicate. Experimental design was RCB with 4 replications. On 25 Sep, the infested plants were dissected from tassel to ground, examined and the number of corn borer larvae recorded. Results were analyzed using analysis of variance procedures. Treatment means were separated using LSD procedures.

scholarly journals Control of Second Generation European Corn Borer, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 215-215
Author(s):  
J. F. Witkowski
Keyword(s):  
Experimental Design ◽  
European Corn Borer ◽  
Second Generation ◽  
Middle Portion ◽  
Corn Borer ◽  
Egg Masses ◽  
2Nd Generation ◽  
Dixon County ◽  
Corn Plants ◽  
Paper Disc

Abstract Foliar treatments of registered and non-registered insecticides for 2nd generation ECB were applied to irrigated corn plots in Dixon County, NE on 12 Aug. Liquid formulated insecticides were applied with a Hahn hi-boy calibrated to deliver 17 gal/acre at 30 psi. Granular formulated insecticides were applied with Noble granulator units mounted on the same Hahn hi-boy with 10 inch row banders. Twenty-four h prior to application, 6 black headed egg masses on paper disc were pinned to the middle portion of 10 marked corn plants in each replicate per treatment. Experimental design was a RCB with 4 replications. On 17 Sep, 10 marked plants per replicate were dissected from tassel to ground, examined and the number of ECB larvae recorded.

scholarly journals Efficacy of Selected Conventional and Experimental Insecticides for Control of European Corn Borer on Snap Beans, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 75-76
Author(s):  
J. T. Shaw ◽  
R. Weinzierl ◽  
J. W. Finger
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
Snap Bean ◽  
Egg Masses ◽  
Snap Beans ◽  
Bean Plants ◽  
Canopy Area ◽  
Untreated Check ◽  
Paper Disc ◽  
Development Applications

Abstract Trials were arranged in a RCB design with four replications. Each replicate had a plot consisting of four 30-inch-wide, 20-ft-long rows. Twenty-five-foot-wide alleys were established between each of the four replications. Insecticides were applied to the middle two rows of each plot, leaving two untreated rows between each plot. Eight insecticide treatments were compared with two untreated checks after multiple manual infestations of ECB egg masses. The two untreated check plots were averaged for the ANOVA. Treatments were to be applied at 28, 21, 14, and 7 days before harvest (DBH); however, because of slow plant development, applications were made at 33, 27, 20, and 12 DBH, every six to eight days beginning on 31 Jul. All insecticide treatments were applied with a modified John Deere 6000 high-clearance vehicle (HCV) with a rear-mounted boom. Six Conejet (TX VS-6) hollow cone nozzles (three per row) were calibrated to deliver 25.2 gpa at 40 psi and a speed of 2.5 mph, utilizing a compressed air system. Four nozzles (2 per row) were attached to drops and directed toward the under surface of the snap bean canopy, area, a third nozzle (one per row) was mounted directly over the row. In one of the center two rows of the 4-row plot, a seven-foot section of row was marked and manually infested (by pinning) with black-headed stage ECB egg masses on wax paper disc, to the foliage of the snap bean plants. Four eggs masses per foot of row were attached i on the following dates: 25 Jul, 1, 8, 15, and 22 Aug.

scholarly journals Aerial Application of Insecticides for Control of First Generation European Corn Borer, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 234-235
Author(s):  
John Witkowski ◽  
Jerry Echtenkamp
Keyword(s):  
Analysis Of Variance ◽  
European Corn Borer ◽  
First Generation ◽  
Aerial Application ◽  
Corn Borer ◽  
Egg Masses ◽  
Untreated Check ◽  
The Town ◽  
Plot Design

Abstract The cornfield was located in Cedar County, northwest of the town of Hartington, NE. Two treatments and an untreated check were arranged in a strip plot design with one replication. Six black headed egg masses were infested onto 30 marked plants (3, ten plant subsamples) per treatment on 6 Jul. A Cessna 188 Ag Truck was used to make the applications on 13 Jul. On 18 Aug, all artificially infested plants were disected from tassel to ground and examined for corn borer cavities. Data were analyzed using analysis of variance procedures. Treatment means were separated using LSD procedures.

scholarly journals Control of European Corn Borer in Whorl Stage Corn, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 185-185
Author(s):  
John F. Witkowski
Keyword(s):  
Experimental Design ◽  
European Corn Borer ◽  
Corn Borer ◽  
Egg Masses ◽  
Single Row ◽  
Insecticide Application ◽  
Application Date

Abstract The experimental design was RCB with 13 insecticide treatments and a control replicated 4 times. Single row plots were 50 ft in length and at 30 inch spacings. Corn was planted into double disk corn stalks on 25 Apr. Granular insecticides were applied in a 7 inch band with cone belt distributors mounted on a Hahn Hi-Boy. Liquid insecticides were applied with a backpack sprayer in 20 gal of water/acre at 30 psi, except for 2 treatments of Pounce 3.2 EC, which were applied at 10 & 30 gal of water/acre. Application date was 29 Jun. Five d prior to insecticide application 6 black headed ECB egg masses were infected in marked plants for later evaluation. On 26 Jul, the 10 marked plants in each replicate were dissected from tassel to ground, examined and the number of corn borer cavities recorded.

scholarly journals Second Generation European Corn Borer Control with Aerial Application of Insecticides, 1992

1994 ◽  
Vol 19 (1) ◽  
pp. 205-205 ◽  
Author(s):  
Marlin E. Rice
Keyword(s):  
European Corn Borer ◽  
Second Generation ◽  
Corn Yield ◽  
Aerial Application ◽  
Yield Data ◽  
Corn Borer ◽  
Egg Masses ◽  
Scale Field

Abstract Insecticides were aerially applied to natural ECB populations in 2 fields near Indianola, IA, using an Ag-Cat airplane. Treatments were replicated 3 times in each field in a RCBD. All liquid formulations were applied in 1.0 gal of water per acre. Pretreatment counts of egg masses on 10 Aug indicated 11 egg masses per 100 plants in Field 1 and 19 egg masses per 100 plants in Field 2. Insecticides were applied on 16-17 Aug; the 2nd application for the split Penncap-M treatment was made on 31 Aug. Treatments were evaluated on 24-25 Sep by splitting stalks, ear shanks, and removing the husks from 10 plants in the center row of each plot (center of the spray swath) and counting live larvae. Yields were taken from the center 4 rows (Field 1) or 6 rows (Field 2) of each plot with a combine. Yields were measured on a truck scale (Field 1) or with a weigh wagon (Field 2) and samples were adjusted to 15.5% moisture and number 2 corn. Yield plot sizes ranged from 0.35-0.64 acre (Field 1) and 0.4 acre (Field 2). Yield data were not collected from replication 2 in Field 2 because of a hybrid change that split the plots. Data were analyzed by using PROC ANOVA or PROC GLM procedures of SAS. Mean separation was accomplished using Fisher’s protected LSD procedure (P = 0.10).

Second Generation European Corn Borer Damage Relationships in Sweet Corn 1

Crop Science ◽  
1980 ◽  
Vol 20 (5) ◽  
pp. 559-562 ◽  
Author(s):  
R. H. Andrew ◽  
P. R. Mosely
Keyword(s):  
European Corn Borer ◽  
Second Generation ◽  
Sweet Corn ◽  
Corn Borer

scholarly journals CONTROL OF SECOND GENERATION EUROPEAN CORN BORER, 2006

2007 ◽  
Vol 32 (1) ◽  
Author(s):  
Gerald W. Echtenkamp ◽  
Thomas E. Hunt
Keyword(s):  
European Corn Borer ◽  
Second Generation ◽  
Corn Borer

Scambus pterophori (Ashm.) (Hymenoptera: Ichneumonidae), a New Parasite of the European Corn Borer, Pyrausta nubilalis (Hbn.) (Lepidoptera: Pyralidae), in Canada

1959 ◽  
Vol 91 (2) ◽  
pp. 128-128
Author(s):  
Marcel Hudon
Keyword(s):  
European Corn Borer ◽  
Second Generation ◽  
Petri Dish ◽  
First Record ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
Pyrausta Nubilalis ◽  
Experimental Plots

In late August, 1957, a parasitized second-generation pupa of Pyrausta nubilalis (Hbn.) was observed in silks of an immature corn ear in the experimental plots at St. Jean. The pupa was incubated at 75°F. in a petri dish, and two weeks later an ichneumonid parasite emerged and was identified by Mr. G. S. Walley, Entomology Division, Ottawa, as Scambus pterophori (Ashm.). Asecond generation of P. nubilalis is very unusual in the St. Jean area. This is apparently the first record of this ichneumonid as a parasite of P. nubilalis in Canada.

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