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 Evaluation of Insecticide Combinations Against Boll Worm/Tobacco Budworm During Late Season in Louisiana, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 271-272
Author(s):  
K. D. Torrey ◽  
B. R. Leonard ◽  
J. H. Fife ◽  
J. H. Pankey ◽  
J. B. Graves
Keyword(s):  
Test Data ◽  
Treatment Efficacy ◽  
Test Area ◽  
Tobacco Budworm ◽  
Research Station ◽  
Hollow Cone ◽  
Flower Buds ◽  
Late Season ◽  
High Clearance ◽  
Overhead Sprinkler

Abstract This test was conducted at the Macon Ridge location of the Northeast Research Station. Cotton was planted 12 Jun in plots consisting of 4 rows (40 inch centers) X 50 ft. Treatments were arranged in a RCB design, replicated 4 times. Applications were made with a high clearance sprayer calibrated to deliver 6 gpa through Teejet TX-8 hollow cone nozzles (2/row) at 46 psi. Insecticides were applied on 8, 11, 14, 18 Aug and 11 Sep. Treatments were evaluated by examining 50 flower buds (squares) per plot for evidence of BW/TBW damage. The plots were mechanically harvested on 16 Oct to determine seedcotton yields. The test area was irrigated by an overhead sprinkler “as needed” during the season, but not within 48 h of treatment applications. Rainfall was not a factor influencing treatment efficacy in this test. Data were analyzed with ANOVA, and means were separated according to DMRT.

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 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 Evaluation of Selected Insecticide Combinations Against Boll Worm/Tobacco Budworm in Louisiana, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 271-271
Author(s):  
K. D. Torrey ◽  
B. R. Leonard ◽  
J. H. Fife ◽  
J. B. Graves
Keyword(s):  
Cotton Seed ◽  
Boll Weevil ◽  
Test Area ◽  
Tobacco Budworm ◽  
Research Station ◽  
Seed Cotton ◽  
Hollow Cone ◽  
Flower Buds ◽  
Damage Data ◽  
High Clearance

Abstract The efficacy of selected insecticides was evaluated against BW/TBW at the Macon Ridge location of the Northeast Research Station. Cotton seed was planted 12 Jun in plots consisting of 4 rows (40 inch centers) X 50 ft. Treatments were arranged in a RCB design and replicated 4 times. Applications were made with a high clearance sprayer calibrated to deliver 6 gpa through Teejet TX-8 hollow cone nozzles (2/row) at 46 psi. Insecticides were applied on 8, 11, 14, 18 Aug and 11 Sep. Treatments were evaluated by examining 50 flower buds (squares) per plot on 11, 14, 22 Aug for evidence of BW/TBW and boll weevil damage. Data reported for boll weevil represent a mean across all sample dates. The plots were mechanically harvested on 16 Oct to determine seed cotton yields. The test area was irrigated by an overhead sprinkler “as needed” during the season, but not within 48 h of treatment applications. Rainfall did not influence the effects of these treatments. Data were analyzed with ANOVA, and means were separated 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 Pirate 3Sc Tank Mixtures Against Bollworm/Tobacco Budworm (Bw/Tbw) in Cotton, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 253-254
Author(s):  
J. H. Fife ◽  
B. R. Leonard ◽  
K. D. Torrey ◽  
J. B. Graves ◽  
J. W. Holloway
Keyword(s):  
Cotton Seed ◽  
Tobacco Budworm ◽  
Research Station ◽  
Hollow Cone ◽  
Flower Buds ◽  
High Clearance ◽  
Overhead Sprinkler

Abstract The efficacy of Pirate tank mixtures was evaluated against BW/TBW at the Macon Ridge (LA) location of the Northeast Research Station. Cotton seed was planted 21 May in plots consisting of 4 rows (40 inch centers) X 50 ft. Treatments were arranged in a RCB design and replicated 4 times. Applications were made with a high clearance sprayer calibrated to deliver 6 gpa through Teejet TX-8 hollow cone nozzles (2/row) at 42 psi. Insecticides were applied on 7, 9, 12, 14 and 27 Aug. Treatments were evaluated by examining 50 flower buds (squares) per plot on 9, 12, 14, 19 Aug, and 4 Sep for evidence of BW/TBW damage and squares infested with larvae. The plots were mechanically harvested on 14 Oct to determine seedcotton yields. The test was irrigated by an overhead sprinkler “as needed” during the season, but not within 48 h of treatment applications. Rainfall did not influence the efficacy of these treatments. Data were analyzed with ANOVA, and means were separated according to DMRT.

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 Efficacy of Selected Insecticides Against Field Populations of Beet Armyworm, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 255-256
Author(s):  
V. J. Mascarenhas ◽  
J. B. Graves ◽  
B. R. Leonard ◽  
E. Burris ◽  
D. Cook ◽  
...  
Keyword(s):  
Treatment Efficacy ◽  
Field Tests ◽  
Experimental Period ◽  
Beet Armyworm ◽  
Hollow Cone ◽  
Insecticide Efficacy ◽  
High Clearance

Abstract Field tests were conducted at the Northeast Research Stations located at St. Joseph and Winnsboro, LA to evaluate the efficacy of 3 registered and 3 experimental insecticides against beet armyworms on cotton. Each test was arranged in a RCBD and replicated 4 times with plots of 4 rows (40 inch centers) by 50 ft. In Test I, cotton (‘Stoneville LA 887’) was planted on 16 May. In Test I cotton (‘DPL 5690’) was planted on 20 Jun. Treatments for Tests I and II were applied with a high clearance sprayer on 15 and 30 Aug, respectively. In Test I, the sprayer was calibrated to deliver 10 gpa through Teejet X-12 hollow cone nozzles (2/row) at 52 psi. In Test II, the sprayer was calibrated to deliver 11.3 gpa through Teejet X-8 hollow cone nozzles (2/row) at 44 psi. Treatment efficacy was determined by taking 2 drop-cloth 3 ft2 samples of a single treated row. Samples were taken at 3, 5, 7 and 10 DAT on rows 1, 2, 3 and 4, respectively. Data were analyzed using ANOVA followed by means separation according to Fischer’s Protected LSD. No rainfall occurred during the experimental period in Test I. Only a trace (< 0.05 inches) of rainfall was recorded during the experimental period in Test II at 7 DAT and it was not considered sufficient to affect insecticide efficacy.

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.

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