scholarly journals European Corn Borer Control with Microbial and Pyrethroid Insecticides on Pre-Tassel Sweet Corn, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 90-90
Author(s):  
W. D. Hutchison ◽  
D. W. Bartels ◽  
P. C. Bolin
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Block Design ◽  
Soil Surface ◽  
University Of Minnesota ◽  
Corn Borer ◽  
Pyrethroid Insecticides ◽  
Randomized Complete Block Design ◽  
The University ◽  
Neonate Larvae

Abstract This test was conducted on the University of Minnesota, Rosemount Experiment Station in corn planted 1 Jun. Plots consisted of single rows on 30" centers, 30 ft in length, and separated by untreated border rows and 4 ft alleys between replicates. Treatments were arranged in a randomized complete block design with 4 replications. All plots were infested 27 Jul with approximately 25 neonate larvae/plant; larvae were applied to the whorl using ‘bazooka’ applicators. Plant growth stage at the time of infestation was primarily VI2-V13 and 95% pre-tassel (i.e., green tassel visible within the whorl). A single application of each treatment was made 4 Aug; the majority of larvae were second-instars. A medium-clearance Spirit sprayer was used to apply all materials. Liquid formulations were applied with one TX-10 nozzle/row at 40 psi, for a final spray volume of 30 gal/acre. Granular formulations were applied using a Gandy applicator. For all materials, applicator ground speed averaged 2 mph, wind speed 2 mph and ambient temperature 59°F. All treatments were evaluated 23 Aug by dissecting 5 plants per plot, from the tassel to the soil surface.

scholarly journals Use of Labeled and Experimental Insecticides for Control of European Corn Borer and Corn Ear- ; Worm on Sweet Corn in Wisconsin, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 91-91
Author(s):  
John Wedberg ◽  
Bryan Jensen
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Block Design ◽  
Research Center ◽  
Corn Borer ◽  
Randomized Complete Block Design ◽  
High Clearance

Abstract ‘Jubilee’ sweet corn was planted at the Arlington Agriculture Research Center, Arlington, WI at 23,000 seeds per acre on 29 June. Each treatment was 6 rows wide and 60 feet long, arranged in a randomized complete block design, replicated four times. The first spray was applied 29 August when the crop started to pollinate. Subsequent sprays were applied 3, 9 and 16 September. All treatments were applied with a high clearance sprayer equipped with D2/23 TeeJet disc-core nozzles calibrated to deliver 10.7 gallons of finished spray per acre at 40 PSI when driven at 2.5 MPH. Plots were evaluated 26 September by removing 25 ears per treatment and recording number of damaged ears and the size of larvae present. “Early” CEW larvae were shorter than 1/2 inch, “Mid” larvae were longer than 1/2 inch but shorter than 3/4 inch and “Late” larvae were longer 3/4 inch. “Early” ECB larvae were shorter than 1/4 inch, “Mid” larvae are longer than 1/4 inch but shorter than 1/2 inch, and “Late” larvae were longer than 3/4 inch.

scholarly journals Colorado Potato Beetle and European Corn Borer Control with Insecticides, Pasquotank Co., Nc, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 131-131
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
European Corn Borer ◽  
Block Design ◽  
Fourth Instar ◽  
Row Spacing ◽  
Hollow Cone ◽  
Corn Borer ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Hill Plots ◽  
Low Rate

Abstract ‘Atlantic’ potatoes were planted in early Mar for Tests 1 and 2 near Elizabeth City, N.C. on 42 inch centers. Plots in Test 1 were 14 ft long and in Test 2 20 ft long, with single row spacing replicated 4 times in a randomized complete block design. Alleys of 5 ft were used between replicates within rows. Treatments in Test 1 and Test 2 were applied with a CO2 pressurized backpack sprayer with a single hollow cone nozzle (18X) operated at 60 psi to deliver 54.5 gal/acre. In Test 1 all treatments were applied on 5, 11 and 18 May. All treatments were applied to Test 2 on 5 May, with the exception of the 1/6 lb rate of Trigard 75WP in combination with Trigard 75WP at 1/3 lb rate which received the combination low rate (1/6 lb) 6 days later. On 11 May applications were applied to all treatments except for Trigard 75WP at the 1/3 lb, 2/3 lb (egg only) and Trigard 75WP 1/3 lb (egg only) plus Trigard 75WP at the 1/6 lb rate. At this time the low rate of the combination Trigard 75WP 1/6 lb rate was applied. Imidan 50WP at 2 lbs and Imidan 50WP at 2 lbs plus Butacide 8EC at 0.5 lbs was applied on 5, 11 and 18 May. Test 1 and Test 2 counts of CPB on 3/hill plots were made 11 and 18 May. Small larvae were assumed to be first and second instar, and large larvae, third and fourth instar. Visual CPB damage ratings were made 18 May and 15 Jun. Visual ECB ratings were made and potatoes harvested and yields recorded 15 Jun.

scholarly journals SWEET CORN EAR RESISTANCE TO THE EUROPEAN CORN BORER (Ostrinia nubilalis, Hubner) AND ITS RESPONSE IN SINGLE CROSSES.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 645f-645
Author(s):  
Mary S. Joyce ◽  
Dave W. Davis
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Hybrids ◽  
Corn Borer ◽  
Breeding Lines ◽  
Corn Breeding ◽  
Resistant Lines ◽  
Additive Gene ◽  
Neonate Larvae

Development of sweet corn hybrids having resistance to ear feeding by the European corn borer (ECB) (Ostrinia nubilalis, Hübner) would save growers millions of dollars annually. Sweet corn breeding lines have been developed which show resistance to ear feeding. To determine whether resistance in these lines was heritable, testcrosses were made between 6 resistant lines and 2 susceptible inbreds. The testcrosses, resistant lines, susceptible inbreds, and Jubilee, a standard susceptible hybrid, were planted in randomized complete blocks replicated 8 times at each of 2 locations. Primary ears were infested, on the ear tip, at mid-silk (R3) with approximately 50 neonate larvae and were evaluated for damage 25 - 30 days later using a 9 point scale. The resistant parents and their testcrosses had 15% to 64% more resistant ears (less than 1% kernel damage at the tip only) than Jubilee. The inbreds and their commercial hybrid did not differ in resistance from Jubilee. Resistance to ECB appears to be polygenic and it has been suggested that some level of non-additive gene action is important. While the specific traits responsible for ear resistance are not known, the resistance of the breeding lines was transmitted to the testcrosses.

scholarly journals Control on Late Season Sweet Corn with Foliar Sprays, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 88-88
Author(s):  
James S. Bowman ◽  
Margaret D. Campbell
Keyword(s):  
New Hampshire ◽  
Sweet Corn ◽  
Block Design ◽  
Larval Feeding ◽  
Harvest Time ◽  
Late Season ◽  
Foliar Sprays ◽  
Randomized Complete Block Design ◽  
The University ◽  
University Of New Hampshire

Abstract The ‘Honeymoon’ sweet corn used in this study was hand-planted in rows on 36 inch centers at the University of New Hampshire Kingman Farm, Madbury, NH on 24 Jun. Each plot consisted of a single 30-ft row of corn and each treatment was replicated 4 times and arranged in a randomized complete block design. Silk sprays were begun on 16 Aug (when approximately 10% of the plants were in silk) using a R & D CO2-pressurized (40 psi) single nozzle hand-held sprayer. These applications were repeated on 19, 23, and 27 Aug. The sprays were directed toward the silk zone on both sides of the plant at a delivery rate of 30.4 gal/acre. Evaluations were made at harvest time on 7 and 8 Sep by examining 25 ears from each replicate for the presence of larvae or larval feeding injury.

scholarly journals Transmittibility of Ear Resistance to European Corn Borer in Sweet Corn Testcrosses and Resistance Stability

1995 ◽  
Vol 120 (1) ◽  
pp. 107-111 ◽  
Author(s):  
Mary S. Joyce ◽  
David W. Davis
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Channel Length ◽  
Resistance Level ◽  
Corn Borer ◽  
Resistant Parent ◽  
Breeding Lines ◽  
Neonate Larvae ◽  
Resistance Stability ◽  
The Relationship

Concern over insecticide usage for control of European corn borer (Ostrinia nubilalis Hübner) in sweet corn (Zea mays L.) in recent years has increased the need for genetic control. Our objectives were to determine the degree of ear feeding resistance transmitted by resistant breeding lines to testcrosses and to investigate the relationship between resistance and both ear silk channel length, and infestation level. Testcrosses averaged 35% acceptable ears compared to 7%. for two commercial control hybrids and 45% for the lines per se when artificially infested at the ear tip at mid-silk at two locations. Generally, resistance in the testcrosses was closer to the resistance level of the resistant parent, indicating good combining ability for resistance. Heterosis above the resistant parent was found in 8 of 12 testcrosses. Across entries, ears having relatively longer silk channel length tended to have less damage but the relationship was not strong (r2 = 0.24, P < 0.01). When silk channels were artificially shortened at infestation, resistance levels were lower, but five of seven lines had a higher proportion of acceptable ears than did the control hybrid. Across increasing levels of infestation from 50 to 200 neonate larvae per ear eight of nine lines had higher resistance (P < 0.05) than the control.

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

Registration of Three European Corn Borer Resistant Sweet Corn Germplasm Lines: A684su A685su, and A686su

Crop Science ◽  
1993 ◽  
Vol 33 (6) ◽  
pp. 1422-1423 ◽  
Author(s):  
D. W. Davis ◽  
D. A. Andow ◽  
W. D. Hutchison
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Borer

scholarly journals CONTROL OF CORN EARWORM AND EUROPEAN CORN BORER ON SWEET CORN, 1998

1999 ◽  
Vol 24 (1) ◽  
Author(s):  
P. K. O'Rourke ◽  
E. C. Burkness ◽  
W. D. Hutchison
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Earworm ◽  
Corn Borer

Pulsed Odors from Maize or Spinach Elicit Orientation in European Corn Borer Neonate Larvae

2009 ◽  
Vol 35 (9) ◽  
pp. 1032-1042 ◽  
Author(s):  
Dariusz Piesik ◽  
Didier Rochat ◽  
Jan van der Pers ◽  
Frédéric Marion-Poll
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
Neonate Larvae

scholarly journals Genotype by Trait Interaction (GT) in Maize Hybrids on Complete Fertilizer

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2388
Author(s):  
Seyed Mohammad Nasir Mousavi ◽  
Csaba Bojtor ◽  
Árpád Illés ◽  
János Nagy
Keyword(s):  
Block Design ◽  
Principal Component ◽  
Gge Biplot ◽  
Maize Hybrids ◽  
Maize Cultivars ◽  
Randomized Complete Block Design ◽  
Total Data ◽  
Ammi Model ◽  
Complete Fertilizer ◽  
The University

We investigated the interaction between genotype by trait, and an experiment was conducted at the University of Debrecen. Two maize cultivars, FAO340 and FAO410, were studied in a randomized complete block design with four replications. This experiment was applied to the six fertilization treatments. Fertilizer levels were NPK0 (control) (N:0, P2O5:0, K2O:0), NPK1 (N:30, P2O5:23, K2O:27), NPK2 (N:60, P2O5:46, K2O:54), NPK3 (N:90, P2O5:69, K2O:81), NPK4 (N:120, P2O5:92, K2O:108), and NPK5 (N:150, P2O5:115, K2O:135). The first principal component showed 54.24%, and the second principal component showed 20.75%, which explained the total squares interaction using the AMMI model in the case of the FAO410 hybrid. As regards the FAO340 hybrid, the first principal component showed 58.18%, and the second principal component showed 18.04%, explaining the total squares interaction using the AMMI model in the FAO410 hybrid. In the GGE biplot on FAO410, the first and the second principal components covered 91.20% of the total data in this analysis. Accordingly, the desirable treatment was NPK5, followed by NPK4, NPK2, NPK3, NPK1, and NPK0. NPK4 and NPK5 had the most desirable treatments for the number of seeds per row, chlorophyll, weight of 1000 seeds, and stem diameter in the case of the FAO410 hybrid.

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