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 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 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 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 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 Pirate 3 SC Against Boll Worm-Tobacco Budworm in Louisiana, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 231-231
Author(s):  
B. R. Leonard ◽  
P. A. Clay ◽  
E. Burris ◽  
J. B. Graves ◽  
C. A. White
Keyword(s):  
Methyl Parathion ◽  
Sprinkler Irrigation ◽  
Boll Weevil ◽  
Test Area ◽  
Tobacco Budworm ◽  
Beet Armyworm ◽  
Feeding Damage ◽  
Seed Cotton ◽  
Hollow Cone ◽  
Soybean Looper

Abstract Cotton was planted 2 Jun with plots consisting of 4 rows (40 in centers) × 50 ft. Treatments were arranged in a RCBD and 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 45 psi. Insecticide treatments were applied on 4, 9, 20, 31 Aug. Methyl parathion 4 EC (0.33 lb [AI]/acre) was applied to all plots on 24 and 28 Aug to reduce boll weevil infestations. Efficacy was determined by examining 50 plant terminals and squares per plot on 6, 13, 23 Aug and 2 Sep for evidence of damage and the presence of bollworm-tobacco budworm larvae. The data reported for bollworm-tobacco budworm and boll weevil damage are a summary of trial means across sample dates. High numbers of soybean looper and beet armyworm larvae were observed in the plots during Sep and visual defoliation ratings were estimated to evaluate differences among treatments. 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 Vi and middle Vi of the plant) or 3 (feeding damage throughout the plant). The plots were mechanically harvested on 17 and 24 Oct to estimate seed cotton yields. The test area received 2.0 inches rainfall on 6 Aug, 0.5 inch on 20 Aug, and 0.3 inch on 28 Aug. Supplemental moisture was provided by sprinkler irrigation "as needed" during the season but not within 48 h of treatment applications.

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 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 Evaluation of Selected Insecticides and Insecticide Combinations Against Boll Weevil, Bollworm and Tobacco Budworm, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 224-224
Author(s):  
J. B. Graves ◽  
B. R. Leonard ◽  
P. A. Clay ◽  
E. Burris
Keyword(s):  
Soil Moisture ◽  
Delivery System ◽  
Methyl Parathion ◽  
Cultural Practices ◽  
Boll Weevil ◽  
Tobacco Budworm ◽  
Silt Loam ◽  
Seed Cotton ◽  
Hollow Cone ◽  
High Clearance

Abstract Cotton was planted in a Gigger-Gilbert silt loam on 2 Jun. Plots consisted of 4 rows on 1.02 m centers × 15.2 m. Treatments were arranged in a RCBD with 4 replications. Field preparation and plot maintenance followed conventional cultural practices. Plots were irrigated to maintain satisfactory soil moisture. All treatments were applied with a high clearance sprayer equipped with a CO2 charged delivery system calibrated to deliver 56.1 liters total spray/ha through TX-8 hollow cone nozzles (2/row) at 3.2 kg/cm2. Treatments were applied on 2, 5 and 16 Aug and evaluated on 5, 9 and 20 Aug (3, 4 and 4 DAT respectively) by visually examining 25 terminals per plot (randomly selected from middle 2 rows of each plot) for eggs, damage and live larvae and 25 squares per plot for live larvae and bollworm-tobacco budworm and boll weevil damage. The center 2 rows of each plot were mechanically harvested on 8 Oct to estimate seed cotton yields. The plots received 5.3 cm rainfall on 6 Aug and a trace of rainfall on 18, 19 and 20 Aug. Methyl parathion 4E (0.37 kg [AI]/ha) was applied on 23 Jul and 10, 24 and 28 Aug to all plots for boll weevil suppression.

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