scholarly journals Foliar Sprays to Control Ear-Invading Insects on Sweet Corn, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 95-96 ◽  
Author(s):  
James J. Linduska ◽  
Marylee Ross ◽  
Donna Baumann ◽  
Annika Parr
Keyword(s):  
Soil Type ◽  
Sweet Corn ◽  
Loamy Sand ◽  
Insect Damage ◽  
Fresh Market ◽  
Foliar Sprays

Abstract ‘NK-199’ sweet corn was planted in 4-row plots 100 ft in length on 29 May. Distance between rows was 3 ft. Distance between plants within the row was 8 inches. Plots consisted of 4 treatment rows with the center 2 rows serving as record rows. Plots were replicated 3 times in a RCB design. Sprays were applied with an International Harvester 770 Hi-Clear sprayer. The spray boom was adjusted to spray the silk area with each row being covered by 4 nozzles. The sprayer was equipped to treat 4 rows. All treatments were mixed in 10 gallons of water and applied at the rate of 25 gpa with 50 psi. Spray treatments were applied at 30% silk 21 Jul, 27 Jul, and 31 Jul, At harvest (8 Aug), 50 ears from the center 2 rows of each plot were husked and evaluated for insect damage for fresh-market (clean ears, no damage evident), processing (evidence of tip feeding but less than 3.6 cm tip damage), and culls (tip damage beyond 3.6 cm to the side and/or bottom). All insects found within the husk or ear were identified. The soil type was Norfolk “A” loamy sand.

scholarly journals Foliar Sprays to Control Ear Invading Insects in Sweet Corn, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 87-87
Author(s):  
James J. Linduska ◽  
Marylee Ross ◽  
Karen Mulford ◽  
John Nottingham
Keyword(s):  
Soil Type ◽  
Sweet Corn ◽  
Block Design ◽  
Loamy Sand ◽  
Fresh Market ◽  
Foliar Sprays ◽  
Randomized Complete Block Design

Abstract ‘NK-199’ sweet corn was planted in 4-row plots 100 ft in length on 1 Jun ‘94. Distance between rows was 3 ft. Distance between plants within the row was 8 inches with the center 2 rows serving as record rows. Plots were replicated 4 times in a randomized complete block design. Sprays were applied with an International Harvester 770 Hi-Clear sprayer. The spray boom was adjusted to spray the silk area with each row being covered by 4 nozzles. The sprayer was equipped to treat 4 rows. All treatments were mixed in 10 gallons of water and applied at the rate of 25 gal/acre with 50 psi. Spray treatments were applied at 30% silk on 20 Jul, 24 Jul and 1 Aug. At harvest (4 Aug), 30 ears from the center 2 rows of each plot were husked and evaluated for worm damage as fresh-market (clean ears, no damage evident), processing (evidence of tip feeding but less than 3.6 cm tip damage), and culls (tip damage beyond 3.6 cm to the side and/or bottom). All worms found within the husk or ear were identified. The soil type was Norfolk “A” loamy sand.

Nitrogen and Weed Management for Organic Sweet Corn Production on Loamy Sand

2016 ◽  
Vol 108 (2) ◽  
pp. 758-769
Author(s):  
Jaimie R. West ◽  
Matthew D. Ruark ◽  
Alvin J. Bussan ◽  
Jed B. Colquhoun ◽  
Erin M. Silva
Keyword(s):  
Weed Management ◽  
Sweet Corn ◽  
Loamy Sand ◽  
Corn Production

scholarly journals Control of Ear-Infesting Insects on Sweet Corn 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 125-126
Author(s):  
S. M. Spangler ◽  
T. Grove ◽  
P. Rebarchak ◽  
D. Calvin
Keyword(s):  
Sweet Corn ◽  
Insect Damage ◽  
Sample Plot ◽  
Nozzle Pressure

Abstract One acre of sweet corn was planted on 27 Jun near University Park (Centre Co.), with rows 2.5 ft apart. The design was a RCB with 5 blocks per treatment. Plots (treatments within blocks) were two rows wide by 34 ft long, with three untreated rows between each treated pair of rows. Blocks were separated lengthwise by 10-ft alleyways. Sprays were delivered with a highclearance sprayer with two nozzles/row, set at tassel height, at a 45° downward angle. Sprays were applied at 72 gpa, with nozzle pressure at 64 psi, a tractor speed of 1.8 mph, and using TX-SS 10 nozzles from the Tee Jet company. Infestation of the planks in the “pre-tassel” stage (tassel visible but prior to anthesis) with ECB was 8% and with FAW larvae 44%. Anthesis was first observed on 20 Aug, and the first silks were observed on 22 Aug. The first spray was applied on 18 Aug. Additional sprays were applied on 22, 26, 29 Aug and 3 Sep. At harvest (11 Sep), 20 ears were picked randomly from each plot. For each ear, the numbers of ECB, FAW, and CEW were noted. For each 20-ear sample/plot, the proportions of the sample with insect damage at the tip, side, and shank were calculated.

NORTHERNVEE AND EARLIVEE SWEET CORNS

1981 ◽  
Vol 61 (2) ◽  
pp. 471-472
Author(s):  
E. A. KERR
Keyword(s):  
Sweet Corn ◽  
Home Garden ◽  
Eating Quality ◽  
Fresh Market

Northernvee and Earlivee are first-early sweet corn cultivars for fresh market and home garden. Northernvee, a three-way hybrid, is slightly earlier but more variable than Earlivee. Both are 12-to 14- rowed and have better eating quality than most early cultivars.

scholarly journals Control of Corn Lepidoptera with Foliar Applications, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 100-101
Author(s):  
A. M. Shelton ◽  
W. T. Wilsey
Keyword(s):  
Sweet Corn ◽  
Vegetable Crops ◽  
Plant Spacing ◽  
Foliar Sprays ◽  
Ear Injury ◽  
Over The Top

Abstract Two separate trials were conducted. Corn for the first trial was planted on 28 May and for the second trial on 12 Jun, both at the Vegetable Crops Research Farm near Geneva, NY. The plants were arranged in a RCB design with four replicates of nine treatments and one check. Plots consisted of seven 25-ft rows of sweet corn on 30-inch centers with 9-inch plant spacing. Blocks were separated by 25 ft. Treatments involved three applications of each insecticide for controlling naturally intesting Lepidoptera. Foliar sprays were applied with a 5-row CO2-pressurized high-boy tractor-mounted boom, having 3 nozzles per row (one over the top and one drop nozzle on each side) with flat fan 110015 tips, and delivering 30 gpa at 47 psi and 2.5 mph. Silwet L-77 spray adjuvant was applied at 0.1% v/v with all treatments. In the first trial, insecticides were applied on 8, 15, and 23 Aug. Treatments for the second trial were applied on 15, 23 Aug, and 2 Sep. Trials were evalu-ated on 2 and 8 Sep for the respective plots by selecting 25 ears from the five treated rows of each plot and evaluating them for ear injury.

Treatment Thresholds for European Corn Borer (Lepidoptera: Pyralidae) Infestations in Early-Season Fresh Market Sweet Corn

1998 ◽  
Vol 33 (4) ◽  
pp. 393-399 ◽  
Author(s):  
Dale I. M. Riggs ◽  
Michael P. Hoffmann ◽  
Larry C. Thetford
Keyword(s):  
New York ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Fresh Market ◽  
Marketable Yield ◽  
Corn Borer ◽  
Air Blast ◽  
Early Season ◽  
Treatment Thresholds ◽  
Lepidoptera Pyralidae

We examined the effect of varying thresholds for treatment of first generation European corn borer, Ostrinia nubilalis (Hübner), infestations in early-season fresh market sweet corn in eastern New York over a 3-year period. Seven treatment thresholds were compared: (1) 15% infested plants at whorl stage, 5% infested plants at tassel and silk stage, (2) 15% at whorl stage, 15% at tassel and silk stage, (3) 30% at whorl stage, 5% at tassel and silk stage, (4) 30% at whorl stage, 15% at tassel and silk, (5) 5% at tassel and silk stage, (6) 15% at tassel and silk stage, and (7) control (untreated). When thresholds were reached, permethrin was applied using an air-blast sprayer. Results indicated little difference in percentage marketable ears whether plants were treated or not at whorl stage, and the tassel stage threshold could be raised to 15% infested plants with no significant effect on percentage marketable ears. We found no difference in marketable yield among plots treated from one side or both sides with an air-blast sprayer.

scholarly journals Control of Aphids on Spinach with Imidacloprid and Other Treatments, 1996

1998 ◽  
Vol 23 (1) ◽  
pp. 138-139 ◽  
Author(s):  
David Riley
Keyword(s):  
Analysis Of Variance ◽  
Cultural Practices ◽  
Hollow Cone ◽  
Fresh Market ◽  
Foliar Sprays ◽  
Direct Seeded ◽  
Spray Volume ◽  
Spray Applications

Abstract Fresh-market type ‘Fall Green’ spinach, was direct seeded on 11 Oct 1995 in 100-cm-width beds and maintained with standard cultural practices at Weslaco, TX. Plots consisted of two rows by 10 m and were arranged in a RCB design with six treatments and four replicates. Admire (imidacloprid) was applied at planting as an 8-cm banded spray in the seed furrow. All other insecticide treatments were foliar sprays which were initiated when aphid numbers exceeded 1 per leaf. Spray applications were made on January 16, 23 and February 14 with three TX6 hollow-cone tips (Spraying Systems Company) per row. The spray volume was 284 ]/ha. Aphids were counted on one expanded leaf per plant on 5 plants per plot. An additional destructive sample was taken at harvest on 8 and 16 Feb to determine the number of gpa per 10 leaves per plot and number of root aphids per 5 mechanically extracted tap roots. Data were subjected to analysis of variance and LSD tests for separation of treatment means.

Dissipation of Fomesafen in New York State Soils and Potential to Cause Carryover Injury to Sweet Corn

2007 ◽  
Vol 21 (1) ◽  
pp. 206-212 ◽  
Author(s):  
Bradley J. Rauch ◽  
Robin R. Bellinder ◽  
Daniel C. Brainard ◽  
Mike Lane ◽  
Janice E. Thies
Keyword(s):  
New York ◽  
Soil Type ◽  
Sweet Corn ◽  
New York State ◽  
Dry Weight ◽  
Corn Yield ◽  
Yield Losses ◽  
Variety Trial ◽  
Snap Beans ◽  
Planting Season

The manufacturer's recommended rate for fomesafen in snap beans, dry beans, and soybeans may cause carryover injury in sweet corn. A field experiment, a survey, and multiple greenhouse experiments were conducted to (1) estimate the fomesafen residue concentrations in the soil that might result from use of lower than registered rates, (2) estimate fomesafen residue concentrations in growers' fields and evaluate grower practices for their effects on carryover potential, and (3) investigate the effects of soil type and sweet corn variety on the potential for fomesafen to cause injury to sweet corn. Results of the dissipation study predicted average soil concentrations to be approximately 0.019 mg fomesafen/kg soil at the start of the sweet corn planting season. Half-life values ranged between 28 and 66 d, with an average of 50 d. Residues in grower fields were slightly less than those found in the dissipation study. Injury from fomesafen varied significantly by sweet corn variety and by soil type. Sweet corn grown in soils with high organic matter and low pH were most susceptible to injury from fomesafen. At high rates of fomesafen (0.12 mg/kg), reductions in dry weight of sweet corn varieties ranged from 5 to 60%. At rates of fomesafen slightly higher than those detected in field soils at the time of sweet corn planting (0.03 mg/kg), dry weight either increased slightly (variety trial) or decreased by 6 to 12% (soil-effect trial) depending on soil type. The risk of sweet corn yield losses because of fomesafen carryover appear relatively low. Growers can reduce the risk of carryover injury by planting tolerant varieties in fields where fomesafen was applied the preceding year.

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