Evaluation of Thrips Densities in At-Planting Seed and Soil Treatments on Gigger Silt Loam, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 245-245
Author(s):  
D. R. Cook ◽  
E. Burris ◽  
B. R. Leonard ◽  
J. B. Graves
Keyword(s):  
Cotton Seed ◽  
Silt Loam ◽  
Seed Cotton ◽  
Seeding Rate ◽  
Spray System ◽  
Whole Plant ◽  
The Press ◽  
Major Pest ◽  
Loam Soil ◽  
Spray Control

Abstract Plots were replicated four times in a RCB design and were four rows wide (40 inch spacing) X45 ft. Stoneville 474 cotton seed of the same seed lot was planted on a Gigger silt loam soil on 7 May. The seeding rate was 4 seed/row ft. Cotton seed was planted with a John Deere 7300 series planter which was equipped with 10 inch seed cones mounted to replace the seed hoppers. Granular in-furrow treatments were applied with standard granular applicators. In-furrow spray treatments were applied with a CO2 charged spray system through 25015 nozzles (1/row) mounted in front of the press wheels. The spray tips were turned to spray across the furrow and calibrated to deliver 5 gpa finished spray. Control of thrips was assessed by randomly selecting 5 plants per plot on 20, 24, 28, and 31 May and 5 and 9 Jun. Plant samples were processed by using whole plant washing procedures to remove insects. Major pest and/or secondary pest control was initiated in Jun and continued on an “as needed” basis through Aug. Percentage of open bolls was determined by counting all open and unopened bolls within a 3.0 m section of a center row on 18 Sep. Plots were harvested on 26 Sep and 10 Oct. These data were subjected to appropriate calculations to determine percent first harvest. The center two rows were mechanically harvested using a John Deere spindle type picker. Yields were converted to lbs seed cotton/acre.

scholarly journals Impact of Cover Crop and At-Planting Insecticide on Thrips Populations, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 247-248
Author(s):  
D. R. Cook ◽  
E. Burris ◽  
B. R. Leonard ◽  
J. B. Graves
Keyword(s):  
Cover Crop ◽  
Cotton Seed ◽  
Seeding Rate ◽  
Vegetation Control ◽  
Spray System ◽  
No Till ◽  
Whole Plant ◽  
The Press ◽  
Major Pest ◽  
Plot Design

Abstract Plots were replicated four times in a split plot design and were four rows (40 inch spacing) X45 ft. Stoneville 474 cotton seed of the same seed lot was planted on 7 May on a Sharkey clay soil which was fertilized with 90 lb N/acre. Cotton seed was planted no-till with a John Deere 7100 series planter which was equipped with 10 inch-seed cones mounted to replace the seed hoppers. The seeding rate was 4 seed/row ft. Granular in-furrow treatments were applied with 8-inch belt cone applicators mounted to replace the standard granular applicators. In-furrow spray treatments were applied with a CO2 charged spray system through 25015 nozzles (1/row) mounted in front of the press wheels. The spray tips were turned to spray across the furrow and calibrated to deliver 5 gpa finished spray. Cover crop treatments consisted of winter wheat and native winter vegetation. Control of thrips was assessed by randomly selecting 5 plants per plot on 21 and 28 May and 7 Jun. Plant samples were processed by using whole-plant washing procedures to remove insects. Major pest and/or secondary pest control was initiated in Jun and continued on an “as needed” basis through Aug

scholarly journals A Threshold Management Test with Nucotn 33B, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 242-242 ◽  
Author(s):  
E. Burris ◽  
D. R. Cook ◽  
B. R. Leonard ◽  
J. B. Graves
Keyword(s):  
Cotton Seed ◽  
Methyl Parathion ◽  
Boll Weevil ◽  
Control Measures ◽  
Silt Loam ◽  
Seeding Rate ◽  
Spray System ◽  
The Press ◽  
Loam Soil ◽  
Insecticide Control

Abstract Plots were replicated four times in a RCB design and were eight rows (40 in spacing) X 45 ft. Transgenic cotton seed expressing the Bt delta endotoxin and seed of the non-transgenic parent line (DP 5415) were planted on 15 May, on a Commerce silt loam soil which was fertilized with 90 lb N/acre. Cotton seed was planted with a John Deere 7100 series planter which was equipped with 10 inch seed cones mounted to replace the seed hoppers. The seeding rate was 4 seed/row ft. Granular in-furrow treatments were applied with 8 inch belt cone applicators. In-furrow spray treatments were applied with a CO2 charged spray system through 25015 flat fan nozzles positioned in front of the press wheels. The spray tips were turned to spray across the furrow and were calibrated to deliver 5 gpa finished spray. All plots received 0.5 lb (AI)/acre Temik 15G and 0.75 lb (AI)/acre Terraclor Super X 2E at planting. Insecticide control measures were applied to treatments when boll worms and tobacco budworms first deposited eggs in Jul, and at 2, 5, and 7 percent BW/TBW/BAW damaged squares. The test was conducted in the presence ol high boll weevil population densities. Beet army worms were present in late Jul, Aug and Sep. Control of boll weevils and tarnished plant bugs was maintained on an “as needed” basis using the following treatments: Methyl parathion 4E, (0.33 lb (AI)/acre) on 11 Jul; Vydate 3.77CLV, (0.25 lb (AI)/acre) on 30 Jul; Methyl parathion 4E, (0.33 lb (AI)/acre) + Orthene 90S, (0.33 lb (AI)/acre) on 6 Aug; Methyl parathion 4E, (0.33 lb (AI)/acre) + Dimethoate 4E. (0.25 lb (AI)/acre) on 13 Aug; Baythroid 2E, (0.045 lb (AI)/acre) on 11 Sep. In addition to the overspray treatments listed above, the DP 5415 and NuCOTN 33B spray strategies (treatments 2 and 4) received the following insecticide treatments: Karate IE, (0.03 lb (AI)/acre) on 22 Jul; Karate IE, (0.03 lb (AI)/acre) on 25 Jul; Karate IE, (0.03 lb (AI)/acre) on 30 Jul; Karate IE, (0.03 lb (AI)/acre) on 5 Aug; Karate IE, (0.03 lb (AI)/acre) on 8 Aug. Cu-racron 8E, (1.0 lb (AI)/acre) + Pirate 3E, (0.2 lb (AI)/acre) + Vydate 3.77CLV, (0.25 lb (AI)/acre) on 15 Aug and Curacron 8E, (1.0 lb (AI)/acre) + Pi-rate 3 SC, (0.2 lb (AI)/acre) + Methyl parathion 4E (0.33 lb (AI)/acre on 26 Aug. Bollgard® threshold treatments 2% and 5% were sprayed with Karate IE, (0.033 lb (AI)/acre) on 8 Aug and Curacron 8E (1.0 lb (AI)/acre) + Pirate 3 SC (0.2 lb (AI)/acre) + Vydate 3.77 CLV, (0.25 lb (AI)/acre) on 15 Aug. All NuCOTN 33B threshold treatments were sprayed with Baythroid 2E (0.045 lb (AI)/acre), on 11 Sep. Plant terminals and squares were examined for BW/TBW eggs, larvae, damage and boll weevil damaged squares on 11, 24, 30 Jul, and 2, 8, 13 and 19 Aug. Terminals were examined on all dates except 19 Aug. The center four rows of the plots were harvested on 14 Oct to determine seedcotton yield. Plots were harvested using a John Deere spindle type picker. Yields were converted to lb seedcotton/acre.

scholarly journals Impact of Soil Saturation on the Performance of At-Planting Insecticides, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 246-247
Author(s):  
D. R. Cook ◽  
E. Burris ◽  
B. R. Leonard ◽  
J. B. Graves
Keyword(s):  
Cotton Seed ◽  
Clay Soil ◽  
Soil Conditions ◽  
Seeding Rate ◽  
Spray System ◽  
Whole Plant ◽  
The Press ◽  
Spray Irrigation ◽  
Major Pest ◽  
Plot Design

Abstract Plots were replicated four times in a split plot design and were four rows (40 inch spacing) X45 ft. Stoneville LA 887 cotton seed of the same seed lot was planted on 6 May on a Sharkey clay soil which was fertilized with 90 lb N/acre. Cotton seed was planted with a John Deere 7100 series planter which was equipped with 10 inch seed cones mounted to replace the seed hoppers. The seeding rate was 4 seed/row ft. Granular in-furrow treatments were applied with 8 inch belt cone applicators mounted to replace the standard granular applicators. In-furrow spray treatments were applied with a CO2 charged spray system through 25015 nozzles (1/row) mounted in front of the press wheels. The spray tips were turned to spray across the furrow and calibrated to deliver 5 gpa finished spray. Irrigation treatments consisted of no irrigation and the equivalent of 4 inches of rainfall 4 days after emergence, simulating excess rainfall and saturated soil conditions. Control of thrips was assessed by randomly selecting 5 plants per plot on 20, 24, 28, and 31 May and 5 and 9 Jun. Plant samples were processed by using whole plant washing procedures to remove insects. Major pest and/or secondary pest control was initiated in Jun and continued on an “as needed” basis through Aug. Plots were harvested on 7 Oct. The two center rows were mechanically harvested using a John Deere spindle type picker. Yields were converted to lbs seed cotton/acre.

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.

scholarly journals Efficacy of two entomopathogenic nematodes strains Steinernema siamkayai and S. abbasi against the 3rd instar larvae of Chiloloba acuta

2018 ◽  
Vol 17 ◽  
pp. 73-81
Author(s):  
M Pokhrel ◽  
RB Thapa ◽  
YD Gharty Chhetry ◽  
M Sporleder
Keyword(s):  
Organic Matter ◽  
Dose Response ◽  
Entomopathogenic Nematodes ◽  
Silt Loam ◽  
Silt Loam Soil ◽  
Major Pest ◽  
Loam Soil ◽  
Ld50 Value ◽  
Time Dose

Larvae of scarabaeid beetle Chiloloba acuta (Coleoptera: Cetoninae) was found high densities in Khulekhani VDC, Makawanpur district. These insects are major pest of flower. The efficacy of two species of entomopathogenic nematodes, Steinernema siamkayai (CD1) and S. abbasi (CS1) was tested against third instar of Chiloloba acuta. In a dose response experiments, 0, 125, 250, 500, 1000, 2000 and 4000 infective juveniles (IJs) were inoculated in 50 ml plastic vial containing 40g silt loam soil (45.3% sand, 33.5% silt, 12.2% clay 4.913 organic matter and 5.5pH) and a single C. acuta larva. Mortality of C. acuta exposed to series of increase dose of two nematodes strains was analysed two days intervals upto 14th days after the inoculation by time dose mortality regression. Between these strains, S. abbasi found more effective (LD50 44.9IJs/ml) as compared to S. siamkayai (LD50 98.1IJ/ml) after 14th days. At initial days both strains had high LD50 value and it was gradually decreased with increase time.

scholarly journals The Effect of Adjuvants on Foliar Insecticide Efficacy Against Thrips in Cotton, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 250-250
Author(s):  
J. H. Fife ◽  
B. R. Leonard ◽  
K. D. Torrey
Keyword(s):  
Delivery System ◽  
Cotton Seed ◽  
Compressed Air ◽  
Research Station ◽  
Silt Loam ◽  
Seedling Disease ◽  
Insecticide Efficacy ◽  
Whole Plant

Abstract Cotton seed was planted in a Gigger silt loam on 11 May at the Macon Ridge location of the Northeast Research Station. The seed was treated with Orthene 80S (8 oz form/cwt seed) and Terraclor Super X (10 lb form/acre) was applied at planting to reduce seedling disease problems. Plots in this test consisted of 2 rows (40 inch centers) X 25 ft. Treatments were arranged in a RCB with 4 replications. Insecticides were applied with a tractor mounted boom equipped with compressed air delivery system calibrated to deliver 10 gpa through Teejet TVS 8001 flat fan nozzles (2/row) at 38 psi. Plots were treated on 25 May and sampled on 28 May (3 DAT), 30 May (5 DAT) and 1 Jun (7 DAT). Treatments were evaluated by randomly collecting 10 plants in each plot and processing samples with whole plant washing procedures. These plots received 0.23 inches of rainfall on 31 May and 0.58 inch of rainfall on 1 Jun. Data were analyzed with ANOVA, and means were separated according to DMRT.

Dissipation of Fluometuron and Trifluralin Residues After Long-term Use

Weed Science ◽  
1994 ◽  
Vol 42 (3) ◽  
pp. 438-445 ◽  
Author(s):  
Billy R. Corbin ◽  
Marilyn McClelland ◽  
Robert E. Frans ◽  
Ronald E. Talbert ◽  
Diana Horton
Keyword(s):  
Silty Clay ◽  
Silt Loam ◽  
Seed Cotton ◽  
Silt Loam Soil ◽  
Loam Soil ◽  
Herbicide Use ◽  
Continuous Use ◽  
Silty Clay Soil ◽  
Herbicide Programs

Existing long-term cotton experiments established in 1976 with minimum and intensive herbicide programs were subdivided in 1985 and 1986 to determine the longevity of fluometuron and trifluralin soil residues after discontinuing herbicide application. In monoculture cotton, seed cotton yield increased when herbicide use was discontinued in 1985 and 1986 after 9 and 10 yr of continuous use, respectively, on a Sharkey silty clay and a Dundee silt loam soil. Yield increases coincided with reductions of fluometuron and trifluralin soil residues. Fluometuron dissipated from the Dundee silt loam soil by 10 mo after the last application but was present in the Sharkey silty clay soil at 0.20 ppmw after 28 mo. Trifluralin did not totally dissipate from either soil, and low levels were present in the Dundee (0.05 ppmw) and Sharkey (0.13 ppmw) soils 30 mo after the last application. Visual injury to fall-seeded wheat and vetch decreased as herbicide residues dissipated. Fall tillage had no significant effect on the rate of fluometuron or trifluralin dissipation from either soil but reduced seed cotton yields.

scholarly journals Granular and Liquid Insecticide Performance Against Corn Rootworm, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 198-198
Author(s):  
A. M. Journey ◽  
K. R. Ostlie
Keyword(s):  
Agricultural Research ◽  
Row Spacing ◽  
Research Station ◽  
Corn Rootworm ◽  
Silt Loam ◽  
University Of Minnesota ◽  
The Press ◽  
Loam Soil ◽  
The University ◽  
Higher Sensitivity

Abstract Experimental plots measuring 2 rows (30-inch row spacing) by 50 ft were planted on 12 May in a Waukegan silt loam soil at the University of Minnesota Agricultural Research Station, Rosemount. Treatments were arranged in a RCBD with 4 replications. Granular insecticides were applied with a modified Noble applicator at planting, either banded ahead of the press wheel or in furrow. Postemergence (25 Jun) sidedress applications of liquid insecticides were made with a CO2-powered backpack sprayer at 20 gpa. Percent lodging was determined on 16 Aug. On 25 Aug, 5 roots from each plot were dug, washed, and rated using the Iowa 1-6 scale (with half-point increments for higher sensitivity).

scholarly journals Evaluations Of Square Damage On Bollgard (Bt) Cotton, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 422-423
Author(s):  
Gene Burris ◽  
Don Cook ◽  
B. R. Leonard ◽  
J. B. Graves ◽  
J. Pankey
Keyword(s):  
Plant Height ◽  
Cotton Seed ◽  
Methyl Parathion ◽  
Boll Weevil ◽  
Compressed Air ◽  
Bt Cotton ◽  
Silt Loam ◽  
Population Densities ◽  
Loam Soil ◽  
Height Data

Abstract Plots were four rows (40-inch spacing) wide X 30 feet long and consisted of a randomized complete design with 4 replications. Cotton seed was planted on 15 May on a Commerce silt loam soil which was sidedress fertilized with 90 lb N/acre. Cotton seed was planted with a John Deere model 7100 series planter equipped with 10 inch seed cones mounted to replace the seed hoppers. The seed rate was 4 seeds/row ft. The granular in-furrow treatment (Temik 15G, 0.5 lb Al/acre) was applied with 8 inch belt cone applicators mounted to replace the standard granular applicators. Terraclor Super-X 2E, 2 quarts formulated/acre, was applied with a compressed air sprayer system attached to 2501 nozzles on the planter. The spray tips were positioned to thoroughly cover the sides and bottom of the seed furrow and were calibrated to deliver 5 GPA finished spray. Stand and plant height data were taken on 16 Jun (data not shown). BWTBW treatments (H. spp.) were applied to Coker 312 (Spray/H. spp.) and Bollgard­ (Spray/8%) on 17 Jul and 2, 10, 17, 24, and 31 Aug. Square and terminal infestation ratings were taken (larvae/25) on 3, 12, 17, 20, 24, 26 Jul and 1, 3, 9, and 14 Aug. Boll damage and foliage damage ratings were taken on 29 Aug. The test was conducted in the presence of high boll weevil population densities. Eight overspray treatments were used to control aphids, plant bugs, and boll weevils in all plots as follows: Provado 1.6F + Vydate 3.77L, 0.04 + 0.25 lb Al/acre, (20 June); Bidrin 8E + Ovasyn 1.5E, 0.4 + 0.25 lb Al/acre, (28 June); Guthion 2L, 0.25 lb Al/acre, (10 July); andMethyl parathion 4E, 0.33 lb Al/acre, (12 July); Methyl parathion 4E, 0.33 lb Al/acre, (28 July and 12, 18 August). Bollgard­ threshold treatments 2% and 5% were sprayed with Karate IE + Larvin 3.2F at 0.033 + 0.25 lb Al/acre on 10 August. Bollgard­ threshold treatments 2%, 5% and 8% were sprayed wit Baythroid 2E + Curacron 8E + Larvin 3.2Fat 0.04 + 1.0 + 0.4 lb Al/acre respectively (17 Aug). All Bollgard­ threshold treatments were sprayed with Methyl parathion 4E + Pirate 3SC + Curacron 8E at 0.33 + 0.25 + 1.0 lb Al/acre on 24 Aug.

A Water-Spray System for Removing Seed from Soil

1988 ◽  
Vol 2 (3) ◽  
pp. 338-341 ◽  
Author(s):  
David A. Kovach ◽  
Donald C. Thill ◽  
Frank L. Young
Keyword(s):  
Soil Sample ◽  
Silt Loam ◽  
Water Spray ◽  
Downy Brome ◽  
Wild Oats ◽  
Spray System ◽  
Silt Loam Soil ◽  
Weed Seeds ◽  
Loam Soil ◽  
Mesh Sieve

A seed remover using a modified water-spray system was constructed to separate weed seeds rapidly and effectively from a silt loam soil A 1-kg soil sample can be washed through the seed remover in 6 min. Using a 500-μ mesh sieve, only 70% of small shepherdspurse seeds were recovered, while 100% of larger seeds of henbit, curly dock, wild oats, and downy brome were recovered. The modified seed remover system reduced the required man-hours by more than 50% compared to previous systems.

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