scholarly journals Evaluation of Soil Insecticides on Continuous Corn, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 234-234
Author(s):  
H. R. Willson ◽  
J. B. Eisley ◽  
C. E. Young ◽  
J. R. Jasinski
Keyword(s):  
Root Systems ◽  
Reduced Tillage ◽  
Row Spacing ◽  
Planting Time ◽  
Continuous Corn ◽  
The Press ◽  
Untreated Check ◽  
Wide Row Spacing ◽  
Soil Insecticides ◽  
Worm Control

Abstract Soil insecticides were evaluated for stand protection and root-worm control at the OARDC Northwestern Branch Station near Hoytville, OH. The test included six treatments compared with an untreated check on reduced tillage plots that were 61 m (200 ft) in length and 4-row wide. Row spacing was at 76.2 cm (30 inches). A RCBD was applied with 4 replicates. Treatments were applied 5 Jun at planting time using a 4-row John Deere 7000 planter equipped Noble granular applicators. All treatments were applied as a band prior to closure by the press wheel. Stand counts on 30.5 m (100 ft) of row and root ratings of 5 root systems per plot using the Iowa 1-6 scale were taken 26 Jul. On 29 Oct, plots were machine harvested to determine yield.

scholarly journals Evaluation of Soil Insecticides on Continuous Corn in Ohio, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 233-233
Author(s):  
H. R. Willson ◽  
J. B. Eisley
Keyword(s):  
Reduced Tillage ◽  
Row Spacing ◽  
Field Station ◽  
Planting Time ◽  
Grain Yields ◽  
Leaf Stage ◽  
Continuous Corn ◽  
The Press ◽  
Untreated Check ◽  
Soil Insecticides

Abstract Soil insecticides were evaluated for stand protection and rootworm control at the OARDC Western Branch Field Station near South Charleston. The test included 19 treatments compared to an untreated check treatment on reduced tillage plots that were 18.2 m (60 ft) in length and 2 rows wide for granular treatments and 4 rows wide for liquid treatments. Row spacing was 76.2 cm (30 inches). A RCBD was applied with 4 replicates. Planting time granular applications were applied as a band prior to closure by the press wheel or in-furrow using a 2 row John Deere 7000 planter equipped with Noble granular applicators. Post-emergence applications of liquid formulations were applied as a banded or broadcasted treatment with a boom sprayer equipped with flat spray nozzles and calibrated to deliver desired dosages at 3 mph. Granular treatments were applied 22 May at planting, and post-emergence treatments were applied 5 Jun to coincide with rootworm hatch. Treatments were evaluated 14 Jun for stand loss with counts of the total and injured plants per 15.1 m (50 ft) of row when corn was predominantly at the 4th or 5th leaf stage. Root ratings were conducted 5 Jul on 5 plants per plot using the Iowa 1-6 scale. Grain yields were determined by machine harvest of total plots on 12 Oct.

Interference of Three Annual Grasses with Grain Sorghum (Sorghum bicolor)

1990 ◽  
Vol 4 (2) ◽  
pp. 245-249 ◽  
Author(s):  
Brenda S. Smith ◽  
Don S. Murray ◽  
J. D. Green ◽  
Wan M. Wanyahaya ◽  
David L. Weeks
Keyword(s):  
Linear Regression ◽  
Grain Yield ◽  
Field Experiments ◽  
Grain Sorghum ◽  
Grass Species ◽  
Row Spacing ◽  
Yield Data ◽  
Weed Density ◽  
Annual Grasses ◽  
Wide Row Spacing

Barnyardgrass, large crabgrass, and Texas panicum were evaluated in field experiments over 3 yr to measure their duration of interference and density on grain sorghum yield. When grain yield data were converted to a percentage of the weed-free control, linear regression predicted a 3.6% yield loss for each week of weed interference regardless of year or grass species. Grain sorghum grown in a narrow (61-cm) row spacing was affected little by full-season interference; however, in wide (91-cm) rows, interference increased as grass density increased. Data from the wide-row spacing were described by linear regression following conversion of grain yield to percentages and weed density to log10. A separate nonlinear model also was derived which could predict the effect of weed density on grain sorghum yield.

scholarly journals Impact of Row Spacing and Planting Date on the Canopy Environment, Abundance of Lesser Cornstalk Borer and Other Arthropods, and Incidence of Aflatoxigenic Fungi in Peanuts

1997 ◽  
Vol 24 (1) ◽  
pp. 52-59
Author(s):  
S. D. Stewart ◽  
K. L. Boweri ◽  
T. P. Mack ◽  
J. H. Edwards
Keyword(s):  
Climatic Conditions ◽  
Planting Date ◽  
Row Spacing ◽  
Planting Dates ◽  
Canopy Development ◽  
Late Planting ◽  
Elasmopalpus Lignosellus ◽  
Soil Temperatures ◽  
Lepidoptera Pyralidae ◽  
Wide Row Spacing

Abstract Three row spacings and two planting dates for peanuts, Arachis hypogaea L., were examined in 1993 and 1994 to determine the influence of the canopy environment on lesser cornstalk borer, Elasmopalpus lignosellus (Zeller) (Lepidoptera: Pyralidae), other arthropods, and alflatoxigenic fungi. Climatically, 1993 and 1994 were disparate years. Decreasing row spacing increased relative leaf area and light interception by the canopy but, compared to difference between planting dates or years, had a relatively small impact on soil temperatures and relative humidity within the canopy. Late planting produced smaller plants, retarded canopy development, and reduced yield in both years, but especially in 1993 when it was hot and dry. The wide row spacing did not yield as well as twin and normal row spacings in either year. Lesser cornstalk borer damage and aflatoxin concentration were higher in the late planting than in the early planting of 1993, but were unaffected by row spacing. Fewer predatory arthropods were caught as row spacing decreased in both beat and pitfall samples, but planting date had variable effects. Prevailing climatic conditions and planting date appeared to be more important in influencing the canopy environment and pest densities than was row spacing.

scholarly journals Corn Rootworm Larval Control, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 174-174
Author(s):  
J. D. Oleson ◽  
J. J. McNutt ◽  
R. D. Pruisner ◽  
J. J. Tollefson
Keyword(s):  
Experimental Tests ◽  
Row Spacing ◽  
Larval Feeding ◽  
Silty Clay ◽  
Harvest Time ◽  
Trap Crop ◽  
Planting Time ◽  
Cultivation Time ◽  
Small Plot ◽  
Yield Trials

Abstract Rootworm planting-time, soil-insecticide test plots were established at 3 IA locations in 1994. Soil types were: Ames (Chapin), silty clay loam; Nashua, loam; and Sutherland, silty clay. Plots were planted 9, 2 and 3 May, respectively, on areas that had been planted to trap crop (late-planted corn, high plant population) the previous year. A RCBD with 4 replications for the experimental and cultivation tests and 8 replications for the yield trials was used. All treatments were applied to single 50-ft length rows with 30-inch row spacing. Granular insecticide formulations were applied with modified Noble metering units mounted on a 4-row John Deere 7100 planter. Planting-time liquid formulations were applied with a compressed-air delivery system built directly into the planter; 8003E nozzles delivered 13 gpa at 23 psi. Liquid cultivation-time insecticides were applied with a small-plot bicycle sprayer. Two 8002E nozzles, 1 on each side of the corn row, were positioned to deliver either a 7 or 15-inch band width around the base of the plants; 13 gpa at 25 psi. Broadcast (30-inch band) applications of Furadan 4F were applied to single rows. A boom containing three 8002 nozzles (19-inch centers) delivered 13 gpa at 32 psi. One untreated buffer row was left on each side of a “broadcasted” row. Granular cultivation-time insecticide applications were made with electrically-driven Noble units mounted on the tool bar of a 2-row, rear-mounted cultivator. Plastic tubes, positioned directly in front of the cultivator sweeps, directed the insecticide granules to both sides of the corn row for basal treatments. Chemical phytotoxicity was checked in early Jun by taking stand counts from 1/1000 acre and measuring extended leaf heights on 10 consecutive plants (experimental tests only). Rootworm larval feeding was evaluated in Jul by digging 5 roots from each treatment row and rating them on the Iowa 1-6 scale (1 equal to no damage or only a few minor feeding scars, and a 6 rating equal to 3 or more nodes of roots completely destroyed). Lodging counts were taken at harvest time. A plant was considered lodged if the angle between the base of the plant and the ground was 45° or less. Stand counts were taken in the yield plots at harvest time. Yields were measured by hand harvesting 1/1000 acre from each treatment at Nashua and Chapin, and machine harvesting 25 row-ft at Sutherland. To determine treatment differences, data were analyzed using ANOVA and means were separated with Ryan’s Q test (REGWQ).

scholarly journals Sowing parameters influenced on proso millet quality and yielding capacity

2019 ◽  
Vol 9 (4) ◽  
pp. 607-611
Author(s):  
S. Poltoretskyi ◽  
L. Riabovol ◽  
I. Diordiieva ◽  
S. I. Riabovol ◽  
A. Yatsenko
Keyword(s):  
Row Spacing ◽  
Panicum Miliaceum ◽  
Yielding Capacity ◽  
Proso Millet ◽  
Capacity Level ◽  
Wide Row Spacing ◽  
Seed Yields ◽  
Correlation Pleiades ◽  
Multiple Factor

The aim of the research is to define optimal sowing parameters that ensure the highest yielding capacity and high quality of the proso millet seeds (Panicum miliaceum L.). To achieve a stated goal we established and analyzed multiple-factor interrelations of the formation of highly productive seed sowing of the proso millet by improving sowing methods and sowing rates as well as conditions improving sowing qualities and yielding capacity of seeds with the application of correlation pleiades. We founded that deviation from the recommended sowing rates in production results in the decline of yielding capacity level. We also suggested that the deficit of seed material caused the highest shortfalls in seed yields compared to its over-expenditure; moreover, the seed planted with wide row spacing had the best yielding capacity, while sowing with row spacing of 15 cm and sowing rate at 3.5 million seeds/ha provided the its highest yielding capacity.

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