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 Bollworm and Tobacco Budworm Control with Selected Insecticides, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 241-242
Author(s):  
S. Micinski ◽  
R. G. Scarborough ◽  
F. D. Forrester ◽  
J. B. Graves
Keyword(s):  
Experimental Design ◽  
Boll Weevil ◽  
Red River ◽  
Tobacco Budworm ◽  
Research Station ◽  
Hollow Cone ◽  
Spray Solution ◽  
Small Plot ◽  
Test Materials ◽  
High Clearance

Abstract A small-plot trial was conducted at the Red River Research Station, Bossier City, LA, to determine the efficacy of selected insecticides in controlling the bollworm/tobacco budworm (BW/TBW) complex on cotton. The experimental design was a RCB with 4 replications. Plots were planted 9 May and were 4 rows X 100 ft on 40-inch centers. All plots had Temik 15 G (0.5 lb [AI]/acre) applied in-furrow at planting. Prior to trial initiation, plots were oversprayed for cutworms on 6 Jun (Karate 1 EC at 0.025 lb [AI]/acre); boll weevils on 9, 13, 18 Jun and 3 Jul (Vydate C-LV at 0.25 lb [AI]/acre); BW/TBW on 27 Jun (Baythroid 2 EC at 0.03 lb |AI]/acre), and 11 Jul (Karate 1 EC at 0.03 lb [AI]/acre); and for aphids on 17 Jul (Provado 1.6°F at 0.047 lb [AI]/acre). Insecticide test materials were applied on 14, 21, 28 Jul, 5 and 14 Aug in 5.9 gal total spray solution/acre at 60 psi with TX-3 hollow-cone nozzles spaced 20 inches apart (2 noz-zles/row). Treatments were applied with a high-clearance sprayer equipped with a CO2 system for spraying small plots. Infestations of BW/TBW larvae and square damage were monitored on 17, 24, 31 Jul, and 7 Aug by examining 25 squares/plot. Following the trial, all plots were oversprayed for BW/TBW on 22 Aug with Karate 1 EC plus Curacron 8 EC at 0.028 + 0.75 lb [AI]/acre. Boll weevil eradication sprays with weekly applications of ULV Malathion (12 oz product/acre) were begun the week of 18 Aug. Yields were determined by mechanically harvesting the center 2 rows of each plot on 7 Oct.

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 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.

scholarly journals Efficacy of Selected Insecticide Mixtures for Bollworm and Tobacco Budworm Control, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 239-241
Author(s):  
S. Micinski ◽  
R. G. Scarborough ◽  
F. D. Forrester ◽  
J. B. Graves
Keyword(s):  
Experimental Design ◽  
Boll Weevil ◽  
Red River ◽  
Tobacco Budworm ◽  
Research Station ◽  
Hollow Cone ◽  
Insecticide Mixtures ◽  
Test Materials ◽  
High Clearance

Abstract Thirteen treatments were evaluated at the Red River Research Station, Bossier City, LA, to determine their efficacy in controlling the bollworm/tobacco budworm (BW/TBW) complex on cotton. Plots were planted 9 May and were 4 rows X 100 ft on 40-inch centers. All plots had Temik 15 G (0.5 lb (AI)/acre) applied in-furrow at planting. The experimental design was a RCB with 4 replications. Prior to trial initiation, plots were oversprayed for cutworms on 6 Jun (Karate 1 EC at 0.025 lb (AI)/acre); boll weevils on 9, 13, 18 Jun and 3 Jul (Vydate C-LV at 0.25 lb (AI)/acre); BW/TBW on 27 Jun (Baythroid 2 EC at 0.03 lb (AI)/acre), and 11 Jul (Karate 1 EC at 0.03 lb (AI)/acre); and for aphids on 17 Jul (Provado 1.6°F at 0.047 lb (AI)/acre). Test materials were applied with a high-clearance sprayer equipped with a CO2 system for spraying small plots. Insecticide treatments were applied on 15, 22, 29 Jul, 5 and 14 Aug in 5.9 gpa at 60 psi with TX-3 hollow-cone nozzles spaced 20 inches apart (2 nozzles/row). Infestations of BW and TBW larvae and square damage were monitored on 18, 25 Jul, 1 and 11 Aug by examining 25 squares/plot. Following the trial, all plots were oversprayed for BW/TBW on 22 Aug with Karate 1 EC plus Curacron 8 EC at 0.028 + 0.75 lb (AI)/acre. Boll weevil eradication sprays with weekly applications of ULV Malathion (12 oz product/acre) were begun the week of 18 Aug. Yields were determined by mechanically harvesting the center 2 rows of each plot on 7 Oct.

scholarly journals Efficacy of Selected Insecticide Mixtures for Bollworm/Tobacco Budworm Control, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 261-262
Author(s):  
S. Micinski ◽  
R. G. Scarborough ◽  
F. D. Forrester ◽  
J. B. Graves
Keyword(s):  
Experimental Design ◽  
Methyl Parathion ◽  
Red River ◽  
Tobacco Budworm ◽  
Research Station ◽  
Hollow Cone ◽  
Insecticide Mixtures ◽  
High Clearance

Abstract Thirteen treatments (insecticides and mixtures) were evaluated at the Red River Research Station, Bossier City, LA, to determine their efficacy in controlling the BW/TBW complex on cotton. Plots were planted 3 May and were 4 rows X 100 ft on 40-inch centers. All plots had Temik 15G (0.5 lb [AI]/acre) applied m-furrow at planting. The experimental design was a RCB with 4 replications. Prior to trial initiation, plots were oversprayed for boll weevils on 4 Jun and 12 Jul (Vydate C-LV at 0.25 lb [AI]/acre); for BW/TBW on 14 Jun (Orthene 90SP at 1.0 lb [AI]/acre), 29 Jun and 18 Jul (Baythroid 2EC at 0.03 and 0.033 lb [AI]/acre, respectively); and for aphids on 29 Jun and 9 Jul with Lorsban 4EC at 0.5 lb [AI]/acre and Provado 1.6F at 0.047 lb [AI]/acre, respectively. Insecticide treatments were applied in 5.9 gpa at 60 psi with TX-3 hollow-cone nozzles spaced 20 inches apart (2 nozzles/row). Treatment were applied with a high-clearance sprayer equipped with a CO2 system for spraying small plots. Insecticide treatments were applied on 23, 30 Jul and 6 Aug. During and after the trial, all plots were oversprayed for boll weevils with methyl parathion 4EC at 0.33 lb [AI]/acre on 2, 19, 21, 30 Aug and 6 Sep and for BW/TBW on 21 Aug with Baythroid at 0.033 lb [AI]/acre. Infestations of larvae and square damage were monitored on 26 Jul, 1 and 8 Aug by examining 25 squares/plot. Yields were determined by mechanically harvesting the center 2 rows of each plot on 30 Oct.

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 Efficacy of Selected Insecticides Against the Southern Green Stink Bug on Soybean in Louisiana, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 236-237
Author(s):  
P. S. Lingren ◽  
A. T. Wier ◽  
D. J. Boethel
Keyword(s):  
Growth Stage ◽  
Compressed Air ◽  
Row Spacing ◽  
Growth Stages ◽  
Research Station ◽  
Stink Bug ◽  
Southern Green Stink Bug ◽  
Small Plot ◽  
Green Stink Bug ◽  
Sweep Net

Abstract Several insecticides were tested for efficacy of control against southern green stink bug in 3 small plot trials at the St. Gabriel Research Station in Iberville Parish, LA. Test 1 was conducted on 17 Aug on ‘Ring Around 452’ in the R6 growth stage. Tests 2 and 3 were conducted on 3 Sep on ‘Delta Pine 415’ in the R6 and R5 growth stages, respectively. Treatments in all tests were arranged in a RCBD with 4 replications. Plots were 50 ft by 5 rows (36 inch row spacing). Treatments were applied with a tractor using a compressed air sprayer calibrated to deliver 10 gpa at 44 psi with 8002 flat fan nozzles. At 2 and 7 DAT, one 25 sweep sample was taken from each plot using a 15 inch diameter sweep net. Nymph and adult SGSB were counted. No rainfall was recorded during any of the tests.

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 Evaluation of Insecticide Combinations Against Late Season Populations of Bollworms, Tobacco Budworms and Boll Weevils, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 198-198
Author(s):  
J. B. Graves ◽  
J. H. Pankey ◽  
B. R. Leonard ◽  
C. A. White
Keyword(s):  
Test Area ◽  
Tobacco Budworm ◽  
Research Station ◽  
Feeding Damage ◽  
Seed Cotton ◽  
Hollow Cone ◽  
Late Season ◽  
High Clearance

Abstract Six insecticide treatments were evaluated at the Macon Ridge Branch of the Northeast Research Station, Winnsboro, LA, to determine their efficacy in controlling the bollworm/tobacco budworm complex and boll weevils. Cotton was planted 18 Jun in plots consisting of 4 rows (40 inch centers) × 50 ft. Treatments were arranged in a RCBD with 4 replications. Treatments were applied 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 22, 26 Aug and 1 Sep against established populations of bollworms, tobacco budworms (primarily tobacco budworms) and boll weevils. Efficacy of the various treatments against these species was determined on 25, 31 Aug and 7 Sep by examining 50 squares/plot for evidence of feeding damage. Also numbers of larvae per 50 squares were recorded for the bollworm/tobacco budworm complex. The plots were mechanically harvested on 25 Oct to determine seed cotton yields. The test area received 0.57 and 0.20 inches rainfall on 1 and 6 Sep, respectively.

scholarly journals Evaluation of an Insecticide Rescue Treatment Against Bollworm, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 227-228
Author(s):  
J. H. Fife ◽  
B. R. Leonard ◽  
K. D. Torrey ◽  
J. B. Graves
Keyword(s):  
Cotton Seed ◽  
Research Station ◽  
Hollow Cone ◽  
Field Sample ◽  
Rescue Treatment ◽  
Charged System ◽  
Second Procedure ◽  
High Clearance

Abstract The efficacy of selected insecticide treatments was evaluated against an established infestation of BW at the Macon Ridge location of the Northeast Research Station. Cotton seed was planted 29 May in plots consisting of 4 rows (40-inch centers) X 50 ft. Treatments were arranged in a RCB design and replicated 6 times. Applications were made with a high-clearance sprayer and CO2-charged system calibrated to deliver 6 gpa through Teejet TX-8 hollow-cone nozzles (2/row) at 47 psi. Insecticides were applied on 6 Aug. Treatments were evaluated using two methods. In the first, 5 BW larval infested bolls were removed from each plot 2 h after treatment, placed in 20-ml plastic vials, and transported to the laboratory. Mortality of BW larvae was determined at 2 DAT and 4 DAT. In the second procedure, a field sample of 100 random bolls was taken from each plot and examined for damage and live larvae at 5 DAT. Rainfall did not influence the efficacy of these treatments. Data were analyzed with ANOVA and means were separated according to DMRT.

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