scholarly journals Control of Soybean Insect Pests in the Macon Ridge Region of Louisiana, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 270-270
Author(s):  
B. R. Leonard ◽  
P. A. Clay ◽  
D. J. Boethel ◽  
J. Thomas ◽  
A. T. Weir
Keyword(s):  
Insect Pests ◽  
Test Area ◽  
Compressed Air ◽  
Hollow Cone ◽  
Insecticide Efficacy ◽  
Air System ◽  
Sweep Net

Abstract Two tests were conducted to evaluate insecticide efficacy against foliage feeding insect pests of soybean. Plots consisted of 5 rows (40 inch centers) × 50 ft, were planted on 7 Jun. Treatments in both tests were arranged in a RCBD with 4 replications. Insecticides were applied with a tractor-mounted boom and compressed air system calibrated to deliver 10 gal total spray/acre through Teejet X-12 hollow cone nozzles (2/row) at 30 psi. Treatments were applied on 18 Aug and 20 Aug in Test 1 and Test 2, respectively. Insecticide efficacy was evaluated at 2 and 7 DAT using two 25-sweep samples/plot with a standard 15 inch diam sweep net. Rows 2 and 3 were sampled 2 DAT and rows 4 and 5 were sampled 7 DAT. On 20 Aug. 0.5 inches rainfall was recorded over the test area. However, the treatments in Test 2 were not applied until after the rainfall had occurred.

scholarly journals Control of Soybean Looper in the Macon Ridge Region of Louisiana, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 236-236
Author(s):  
B. R. Leonard ◽  
C. A. White ◽  
A. T. Wier ◽  
P. S. Lingren
Keyword(s):  
Compressed Air ◽  
Research Station ◽  
Hollow Cone ◽  
Insecticide Efficacy ◽  
Air System ◽  
Soybean Looper ◽  
Sweep Net

Abstract Insecticide efficacy against soybean looper was evaluated at the Macon Ridge Branch of the Northeast Research Station. Plots consisted of 4 rows (40 inch centers) × 50 ft, planted 3 Jun. Treatments in both tests were arranged in a RCB with 4 replications. Insecticides were applied on 23 Aug with a tractor-mounted boom and compressed air system calibrated to deliver 10 gal total spray/acre through Teejet X-8 hollow cone nozzles (2/row) at 38 psi. Treatments were evaluated at 3 and 7 DAT using two 25-sweep samples/plot with a standard 15 inch diameter sweep net. Rows 2 and 3 were sampled 3 DAT and rows 4 and 5 were sampled 7 DAT. No rainfall occurred during the test.

scholarly journals Evaluation of Selected Foliar Applied Insecticides on Potato Leafhopper in Virginia-Type Peanut, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 253-254
Author(s):  
D. A. Herbert
Keyword(s):  
Test Area ◽  
Potato Leafhopper ◽  
Row Spacing ◽  
Hollow Cone ◽  
Isle Of Wight ◽  
Full Coverage ◽  
Pre Treatment ◽  
Over The Top ◽  
Sweep Net ◽  
Area Data

Abstract Selected foliar applied insecticides were evaluated against PLH in Virginia-type peanut. ‘VA-C 92R’ peanut was planted on a producer’s farm in Isle of Wight County, VA using 36-inch row spacing. Foliar treatments were applied on 31 Jul as a full-coverage spray with a CO2-pressurized backpack sprayer calibrated to deliver 14.5 gpa at 50 psi through three D2-13 hollow-cone nozzles per row, one over the top and one on each side of each row. A RCB design was used with 4 replicates. Plots were 4 rows by 40 ft. PLH were sampled by making 5 sweeps per plot with a 15-cm-diameter sweep net and counting numbers of captured adults and nymphs. The pre-treatment sample was not taken on each plot, but was comprised of 20 random 5-sweep samples distributed throughout the planned test area. Data were analyzed using ANOVA and LSD procedures.

scholarly journals Evaluation of Scout X-Tra and Decis Formulations Against Bollworm and Tobacco Budworm, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 206-206
Author(s):  
B. R. Leonard ◽  
C. A. White ◽  
J. B. Graves ◽  
J. H. Pankey
Keyword(s):  
Delivery System ◽  
Treatment Efficacy ◽  
Methyl Parathion ◽  
Boll Weevil ◽  
Test Area ◽  
Compressed Air ◽  
Tobacco Budworm ◽  
Control Treatment ◽  
Hollow Cone ◽  
Supplemental Irrigation

Abstract Cotton was planted 2 Jun into plots consisting of 4 rows (40 inch centers) × 50 ft. Treatments were arranged in an RCB design with 4 replications. Applications were made with a high clearance sprayer and compressed air delivery system calibrated to deliver 6 gal total spray/acre through Teejet X- 8 hollow cone nozzles (2/row) at 46 psi. Insecticide treatments were applied on 12, 15, 22 Aug. Methyl parathion 4 EC (0.33 lb (AI)/acre) was applied on an “as needed” basis for boll weevil control. Treatment efficacy was determined by examining 50 squares for evidence of damage. The center two rows of each plot were mechanically harvested on 12 Oct to estimate seedcotton yields. The test area received 0.11, 1.9 and 0.13 inches rainfall on 13, 20, 21 Aug, respectively. Supplemental irrigation was provided by an overhead system sprinkler “as needed” during the season, but not within 48 h of treatment applications.

scholarly journals Evaluation of Pirate 3SC Against Cotton Insect Pests in Louisiana, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 205-205
Author(s):  
B. R. Leonard ◽  
C. A. White ◽  
J. B. Graves
Keyword(s):  
Insect Pests ◽  
Sprinkler Irrigation ◽  
Boll Weevil ◽  
Test Area ◽  
Tobacco Budworm ◽  
Beet Armyworm ◽  
Feeding Damage ◽  
Hollow Cone ◽  
Soybean Looper ◽  
High Clearance

Abstract Cotton was planted 2 Jun with plots consisting of 4 rows (40 inch centers) × 50 ft. Treatments were arranged in a RCBD, replicated 4 times. Applications were made with a high clearance sprayer calibrated to deliver 6 gal total spray/acre through Teejet X-8 hollow cone nozzles (2/row) at 46 psi. Insecticides were applied on 9, 12, 15, 22 Aug and 1 Sep. Treatments were evaluated by examining 50 squares per plot on 12, 15, 19, 26 Aug for evidence of bollworm-tobacco budworm and boll weevil damage. The data reported for boll weevil are a summary of across sample dates. High numbers of soybean looper and beet armyworm larvae were observed in the plots during Sep and visual defoliation ratings were used to evaluate treatments on 21 Sep. Each plot was scored as follows: 0 (no feeding damage), 1 (feeding damage within the lower Vi of the plant), 2 (feeding damage in the lower Vs and middle % of the plant) or 3 (feeding damage throughout the plant). The plots were mechanically harvested on 25 Oct to determine seedcotton yields. The test area received 0.1, 1.9, 0.6 and 0.2 inches rainfall on 14, 21 Aug, and 2, 7 Sep, respectively. Supplemental moisture was provided by sprinkler irrigation “as needed” during the season, but not within 48 h of treatment applications.

scholarly journals Control of Soybean Looper with Experimental Chemistry in Louisiana, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 252-252
Author(s):  
Alan T. Wier ◽  
David J. Boethel ◽  
P. Scott Lingren ◽  
B. Roger Leonard
Keyword(s):  
Growth Regulator ◽  
Insect Growth Regulator ◽  
Compressed Air ◽  
Research Station ◽  
Hollow Cone ◽  
Insect Growth ◽  
Small Plot ◽  
Soybean Looper ◽  
Screening Trial ◽  
Sweep Net

Abstract The efficacy of several experimental insecticides that consist of pyrrole or avermectin chemistry, or exhibit insect growth regulator activity were evaluated against the soybean looper (SBL) on soybean in a small plot insecticide screening trial at the Macon Ridge Branch of the Northeast Research Station near Winnsboro, Louisiana. Activity of these materials was compared to that of the standard recommended insecticide Larvin at 0.6 lb (AI)/acre. Plots measured 50 ft by 5 rows (40 inch spacing) and were arranged in a RCB with 4 replications. Insecticides were applied on 23 Aug (R5, beginning seed stage) with a tractor and compressed air sprayer calibrated to deliver 10 gpa at 38 psi through TX8 hollow cone nozzles. Treatments were evaluated using 25 sweeps (15 inch diameter sweep net) per plot at 2, 5, and 7 DAT. No precipitation occurred throughout the duration of this experiment.

Energy Efficiency Based Operation of Compressed Air System on Ships to Reduce Fuel 163 Consumption and CO2 Emission

2019 ◽  
Vol 161 (A2) ◽  
Keyword(s):  
Energy Efficiency ◽  
Fuel Consumption ◽  
Unit Cost ◽  
Leakage Rate ◽  
Compressed Air ◽  
Power Requirement ◽  
Important Indicator ◽  
Operating Load ◽  
Air System ◽  
Potential Energy Saving

Energy efficiency subject has been gaining importance in maritime sector. The compressed air is a valuable energy source in operational manner, by the reason of intrinsic lack of efficiency in pressurization process. Operational pressure and leakage rate are the major variables which affect operational efficiency of the system. This study aims to reveal potential energy saving for the compressed air system. To this end, several pressure ranges, 29-30 bars to 14-18 bars, and different leakage rates 2.4% to 45% are evaluated. After the data was obtained from ships, thermodynamic calculations had been carried out. Optimization of pressure saves 47.3% in daily power requirement, 58,2% in compressed air unit cost, 18.4 and 57.4 tons of reduction in fuel consumption and CO2 emissions in a year respectively. High leakage rates can cause 2.7 times more power and fuel consumption. Finally, operating load, as an important indicator of compressor, makes imperfections identifiable.

scholarly journals Asset Management Perception for Industrial Compressed Air Systems

1996 ◽  
Author(s):  
Henry L. Kemp
Keyword(s):  
Asset Management ◽  
International Market ◽  
Compressed Air ◽  
Market Place ◽  
Air System ◽  
Necessary Evil

It is widely accepted that industrial and commercial electricity users will continue to be increasingly challenged to reduce costs in order to be more competitive in their local, national and international market place. Today’s forward thinking and effective managers are viewing and managing the industrial compressed air system as an asset, not a necessary evil. Paper published with permission.

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