scholarly journals Evaluation of Insecticides for Management of Sorghum Midge in Sorghum, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 278-278
Author(s):  
B. A. Castro ◽  
T. J. Riley ◽  
B. R. Leonard
Keyword(s):  
Grain Sorghum ◽  
Research Station ◽  
Silt Loam ◽  
Hollow Cone ◽  
Sorghum Midge ◽  
Damage Data ◽  
Charged System ◽  
Seed Yields ◽  
High Clearance

Abstract Selected insecticides were evaluated for control of sorghum midge in grain sorghum at the Macon Ridge location of the Northeast Research Station near Winnsboro, LA. Grain sorghum was planted in a Gigger-Gilbert silt loam on 6 Jun in 4-row plots (40-inch centers) X 60 ft. Treatments were arranged in a RCB design with four replications. In-secticide treatments were applied with a high clearance sprayer equipped with a CO2 charged system calibrated to deliver 6 gpa at 47 psi through TX-8 hollow-cone nozzles (2/row). All insecticides were applied on 5 Aug when an average of 25% of sorghum plants in the field were at some stage of yellow flowering. Sorghum midge damage to seed heads was evaluated in the field on 5 Sep by visually estimating the percent blasted kernels on each of 20 randomly selected panicles from the 2 center rows per plot. Sorghum seed yields were obtained on 10 Sep by mechanically harvesting the 2 center rows in each plot. Sorghum midge damage data were transformed [arcsin (x/100)] prior to ANOVA and DNMRT. Actual means are presented in the table.

scholarly journals Evaluation of Insecticide Application Timing on Sorghum Midge Injury to Grain Sorghum, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 286-286
Author(s):  
B. A. Castro ◽  
T. J. Riley ◽  
O. I. Rodriguez ◽  
B. R. Leonard
Keyword(s):  
Grain Sorghum ◽  
Research Station ◽  
Silt Loam ◽  
Hollow Cone ◽  
Application Timing ◽  
Insecticide Application ◽  
Sorghum Midge ◽  
Charged System ◽  
Seed Yields ◽  
High Clearance

Abstract The test was conducted at the Macon Ridge Location of the Northeast Research Station in Franklin Parish, LA. Plots (28 ft X 8 rows) were planted on a Gigger-Gilbert silt loam on 15 Jun in a RCB design with 5 replications. Karate 1EC at 0.02 lb (AI)/acre was applied with a high clearance sprayer equipped with a CO2 charged system calibrated to deliver 9.3 gpa at 46 psi and 3.3 mph through TX-8 hollow-cone nozzles (2/row). Application timing for each treatment was determined by selecting and tagging 20 plants from the 2 center rows before spraying. For the 50% and 90% panicle emergence treatments, 10 and 18 plants, respectively, had panicles completely emerged with no open flowers. For the 20, 50 and 90% flowering treatments, 4, 10 and 18 of 20 tagged plants per plot, respectively, had flowering panicles. A panicle was considered to be flowering when the upper 25% portion had open spikelets. Treatments were applied on 28 Jul for the 50 and 90% panicle emergence and on 31 Jul for the 20, 50 and 90% panicle flowering. Sorghum midge damage to seed heads was evaluated on 24 Aug by estimating percent blasted kernels on each tagged plant. Sorghum seed yields were obtained on 8 Sep by manually harvesting panicles from the 20 tagged plants and by mechanically harvesting the entire 2 center rows in each plot.

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.

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 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 Insecticides for Suppression of Sorghum Midge on Sorghum, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 231-231
Author(s):  
R. M. Anderson ◽  
G. L. Teetes
Keyword(s):  
Grain Yield ◽  
Grain Sorghum ◽  
Agricultural Experiment Station ◽  
Hollow Cone ◽  
Yield Data ◽  
Sorghum Midge ◽  
Plastic Bags ◽  
Agricultural Experiment ◽  
Clear Plastic ◽  
Spray Volume

Abstract Selected insecticides were evaluated for sorghum midge control at the Texas Agricultural Experiment Station Research Farm near College Station, TX. Hybrid grain sorghum (ATx399 × RTx430) was planted 20 May in rows spaced 30 inches apart. Insecticide treatments were compared in plots, 8 rows × 40 ft long, arranged in a RCB design with 4 replications. Insecticides were applied to the middle 2 rows of plots. Insecticides were applied between 0800 and 0900 hours CDT by using a hand-held backpack sprayer with TX-3 hollow cone nozzles at 35 psi, producing a finished spray volume of 5.6 gpa. Application began when 10-30% of the panicles were flowering; insecticides were applied 10, 13, and 16 Jul. Adult sorghum midge abundance was determined just prior to each application by counting the number of sorghum midges on 10 individual sorghum panicles enclosed in clear plastic bags. The panicles were cut from the plant and returned to the laboratory for examination and sorghum midge counts. Grain yield data were collected from the 2 middle rows per plot. Panicles were hand harvested from selected 8.75 ft sections of row/plot and mechanically threshed. Data were statistically analyzed by using ANOVA and LSD.

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.

Sign in / Sign up

Export Citation Format

Share Document