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 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 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.

scholarly journals Evaluation of Selected Bacillus Thuringiensis Insecticides for Control of Soybean Looper in North Louisiana, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 238-238 ◽  
Author(s):  
Rosanne N. Mascarenhas ◽  
Alan T. Wier ◽  
David J. Boethel ◽  
P. Scott Lingren ◽  
B. Rogers Leonard
Keyword(s):  
Block Design ◽  
Experimental Period ◽  
Compressed Air ◽  
Row Spacing ◽  
Research Station ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Period Data ◽  
Soybean Looper ◽  
North Louisiana

Abstract A field study was conducted at the Macon Ridge Branch, Northeast Research Station, located near Winnsboro (Franklin Parish), Louisiana, to evaluate the efficacy of several B. thuringiensis insecticides for soybean looper control. Test plots were 50 ft long by 5 rows with a 40 inch row spacing and were arranged in a randomized complete block design with four replications. Insecticides were applied with a tractor and compressed air sprayer calibrated to deliver 10 gpa at 38 psi through TX8 hollow cone nozzles (2 per row). Insecticide treatments were applied to soybeans in the R5 stage of growth (beginning seed) on 25 Aug. Posttreatment counts, consisting of 25 sweeps per plot, were taken with a 15 inch diameter muslin net at 2, 5, and 7 DAT. No rainfall occurred and the plots were not irrigated during the experimental period. Data were analyzed using analysis of variance followed by means separation according to DMRT.

scholarly journals Evaluation of Soybean Looper and Stink Bug Control on Soybean, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 312-313
Author(s):  
B. J. Fitzpatrick ◽  
C. G. Clemens ◽  
D. J. Boethel ◽  
S. Micinski
Keyword(s):  
Red River ◽  
Research Station ◽  
Stink Bug ◽  
Sample Plot ◽  
Hollow Cone ◽  
Small Plot ◽  
Soybean Looper ◽  
Sweep Net ◽  
High Clearance

Abstract Efficacy of standard and experimental in secticides was evaluated in two small plot trials conducted at the Red River Research Station located near Bossier City, LA (Bossier Parish). Treatments were applied to ‘Hutcheson’ soybeans with a high clearance, CO2-pressurized sprayer calibrated to deliver 5.9 gpa at 40 psi through TXVS6 hollow cone nozzles (2/row). Plots were 50 ft X 4 rows (40 inch centers) and arranged in a RCBD with 4 replications. Treatments were applied on 20 and 22 Aug in Tests 1 and 2, respectively. One 25-sweep sample/plot was taken with a standard 15-inch diam sweep net at 2, 5, and 9 DAT in Test 1 and 3 and 7 DAT in Test 2. On 27, 28, and 29 Aug both tests received 0.17,0.92, and 0.27 inches of rainfall, respectively. Data were analyzed with ANOVA and means sep arated by DNMRT.

scholarly journals Efficacy of Selected Commercial and Experimental Insecticides Against Late Season Populations of Beet Armyworm, Soybean Looper, and Tobacco Budworm, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 197-197 ◽  
Author(s):  
J. B. Graves ◽  
B. R. Leonard ◽  
C. A. White
Keyword(s):  
Treatment Efficacy ◽  
Tobacco Budworm ◽  
Beet Armyworm ◽  
Research Station ◽  
Hollow Cone ◽  
Late Season ◽  
Soybean Looper ◽  
High Clearance

Abstract Three tests, each consisting of 4-5 insecticide treatments were replicated 4 times in a RCBD at the Macon Ridge Branch of the Northeast Research Station, Winnsboro, LA. Cotton was planted 1 Jul into plots 4 rows (40 inch centers) by 30 ft. Treatments for Tests 1, 2 and 3 were applied on 2, 13 and 14 Sep, respectively, with a high clearance sprayer calibrated to deliver 11.5 gal total spray/acre through Teejet X-8 hollow cone nozzles (2/row) at 46 psi. Treatment efficacy was determined by taking a 10 sweep (standard 15 inch diam net) sample from each plot. Sweep samples were usually taken 2, 4-5 and 6-7 DAT on rows 1, 2 or 3, respectively. The test areas received 0.20, 0.67 and 1.1 inches rainfall on 6, 15 and 16 Sep, respectively.

Velvetbean Caterpillar Control on Louisiana Soybean, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 271-272
Author(s):  
J. D. Thomas ◽  
A. T. Wier ◽  
M. L. Boyd ◽  
S. Lingren ◽  
D. J. Boethel
Keyword(s):  
Growth Stage ◽  
Compressed Air ◽  
Row Spacing ◽  
Research Station ◽  
Velvetbean Caterpillar ◽  
Small Plot ◽  
Sweep Net

Abstract The efficacy of selected insecticides for control of VBC was evaluated in 3 small plot insecticide trials at the St. Gabriel Research Station near St. Gabriel, LA. Treatments in all 3 tests were applied to ‘Buckshot 723’ soybean in the R5 growth stage using a tractor and compressed air sprayer calibrated to deliver 93.5 1/ha at 2.66 kg/cm2 through 8002 flat fan nozzles. Plots in all tests were 5 rows wide (0.91 m row spacing) by 15.2 m, arranged in a RCBD with 4 replications. At 2 and 7 DAT in each test, one 25 sweep sample was taken from each plot with a standard 38.2 cm diam sweep net. Test 1 was applied 6 Sep, Test 2 was applied 8 Sep, and Tesi 3 was applied 14 Sep.

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.

scholarly journals Control of Soybean Looper and Beet Armyworm on Soybean in North Louisiana, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 274-274
Author(s):  
Alan T. Wier ◽  
David J. Boethel ◽  
James D. Thomas ◽  
B. Roger Leonard ◽  
Eugene Burris
Keyword(s):  
Growth Stage ◽  
Methyl Parathion ◽  
Field Experiments ◽  
Beet Armyworm ◽  
Research Station ◽  
Hollow Cone ◽  
Spray Volume ◽  
Experimental Treatments ◽  
Soybean Looper ◽  
North Louisiana

Abstract Two field experiments were conducted to evaluate control of soybean looper and beet armyworm on soybean with several insecticides. In Test 1, insecticides were applied to plots measuring 15.2 m long × 8 rows (0.5 m spacing) located at the Northeast Research Station near St. Joseph (Tensas Parish), LA. Plots were arranged in a RCBD with 4 replication blocks. Insecticides were applied with a tractor and compressed air sprayer calibrated to deliver 93.5 liters/ha at 3.8 kg/cm2 through TX12 hollow cone nozzles (2 per row). Insecticides were applied on 24 Aug to ‘Davis’ soybeans in the R5 growth stage. In Test 2, experimental design, number of replications, nozzle size and type, and spray volume per hectare were identical to Test 1. Plots that measured 12.2 m long by 4 rows (1 m spacing) were located at the Macon Ridge Research Station near Winnsboro (Franklin Parish), LA. Sprayer pressure was 2.8 kg/cm2. Insecticides were applied on 25 Aug to ‘Buckshot 723’ soybeans in the R3 growth stage. Posttreatment samples consisted of one set of 25 sweeps per plot (0.38 m diam muslin net), taken 2 and 6 DAT, or 2 and 7 DAT in Tests 1 or 2, respectively. Precipitation did not occur throughout the duration of both tests and plots were not irrigated. Both test areas were treated with methyl parathion before the experiments. Test 1 was treated with 0.56 kg (AI)/ha 2 wk before experimental treatments were applied and Test 2 was treated with 0.28 kg (AI)/ha 3 wk before experimental treatments were applied.

scholarly journals Use of Labeled and Experimental Insecticides for Control of Potato Leafhoppers and Plant Bugs in Wisconsin, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 153-153
Author(s):  
John Wedberg ◽  
Bryan Jensen
Keyword(s):  
Agricultural Research ◽  
Compressed Air ◽  
Research Station ◽  
Insect Abundance ◽  
Agricultural Research Station ◽  
University Of Wisconsin ◽  
The University ◽  
Experimental Plots ◽  
Sweep Net

Abstract Experimental plots measuring 40 × 50 ft were established in a field of ‘Olds 98’ alfalfa at the University of Wisconsin Agricultural Research Station, Arlington, WI. Treatments were replicated 4 times in a RCBD and applied on 21 Jul by using a tractor-mounted compressed air sprayer equipped with 8001 TeeJet flat fan nozzles delivering 17 gal/acre of finished spray at 40 psi when driven at 2.6 mph. Insect abundance was estimated by taking 20 consecutive pendulum sweeps in each plot with a 15 inch diam sweep net at 7, 11 and 15 DAT.

scholarly journals Insecticide Efficacy Against Dbm, 1995

1997 ◽  
Vol 22 (1) ◽  
pp. 97-98
Author(s):  
R. F. L Mau ◽  
L. R. Gusukuma-Minuto ◽  
R. S. Shimabuku ◽  
K. W. Dunster
Keyword(s):  
Field Size ◽  
Row Spacing ◽  
Research Station ◽  
Plant Spacing ◽  
Total Field ◽  
Hollow Cone ◽  
Single Row ◽  
Insecticide Efficacy ◽  
Set Up

Abstract Three insecticides were evaluated at the Kula Research Station, Maui Agricultural Park, from July to September. The field was set up in a RCB design with five treatments and four replications (blocks). Each treatment plot consisted of a single row of cabbage planted at 18 inch between plant spacing. Treatment plots in each block were separated by a 24 inch row spacing. Blocks were separated by a 36 inch spacing. Total field size was 68 ft. by 70 ft. Treatments were applied using a CO2 backpack sprayer set at 60 psi with an output of 100 gpa. One hollow cone nozzle (TX-26) was used per row. The first treatment was applied one week after transplanting into the field on 18 Jul. Subsequently, six applications were made weekly until the week before harvest on the following dates: 25 Jul, 1, 8, 15, 22, and 29 Aug.

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