scholarly journals Control of Southern Armyworm with Bacillus Thuringiensis in Staked Tomato, Fall 1994

1996 ◽  
Vol 21 (1) ◽  
pp. 191-191
Author(s):  
P. A. Stansly ◽  
J. M. Conner
Keyword(s):  
Bacillus Thuringiensis ◽  
Disease Control ◽  
Methyl Bromide ◽  
Natural Populations ◽  
Beet Armyworm ◽  
Hollow Cone ◽  
Southern Armyworm ◽  
Pump Pressure ◽  
Marketable Size ◽  
High Clearance

Abstract Greenhouse raised tomato seedings “Florasette” were planted 8 Sep. 1994, 18 inches within the row on six subirrigated beds, 240 ft long, 32 ft wide on 6 ft centers. Beds had been fumigated with methyl bromide + chloropicrin 67/33 at a rate of 2201b/acre and mulched with whiteside polyethylene. Each of 4, 125 ft blocks was divided into 4, 3-row plots 25 ft long plus 2.5 ft walkways. Plants were sprayed weekly with an alternating combination of Maneb 80 WP at 1 lb/acre plus Kocide 101 at 31b/acre and Bravo 720 at 1.5 pt/acre for disease control. Plants were inoculated on 5 Oct with beet armyworm and on 19 Oct with SAW on 19 Oct to supplement natural populations by applying 2-3 neonates (2-3 per plant) in Grito-O-Cobs (20-40 mesh) to foliage with a “bazooka” gun. Treatments and spray schedules are given in Tables 1 and 2. Spray was delivered weekly for 7 weeks starting in 21 Oct using a high clearance sprayer equipped with yellow hollow cone Albuz nozzles at 200 psi pump pressure. Configuration for the first 4 applications was 9 nozzles per row, one overhead and four each side calibrated to deliver 89 GPA. An additional nozzle per side drop was added for the last 3 applications to deliver 110 GPA. Larval populations were evaluated weekly from 21 Oct to 29 Nov on 6 ft of row from the center of each 3-row plot in two-plant (between-stake) units. Larvae were counted in 3 size categories: small, medium and large but only medium and large are reported. Fruit of marketable size was harvested on 21 Nov & 02 Dec and graded on a commercial table with weights and numbers recorded.

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.

Toxicity of Bacillus Thuringiensis Products Against Budworm and Bollworm in Cotton, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 236-236
Author(s):  
W. J. Moar ◽  
R. McCollum ◽  
R. Smith
Keyword(s):  
Bacillus Thuringiensis ◽  
Hollow Cone ◽  
Water Ph ◽  
Microbial Treatments ◽  
High Clearance

Abstract Cotton was planted 23 Apr at the Wiregrass Experiment Substation in Headland, AL, in 8 row plots (36 inch centers) × 75 ft long with 25 ft alleys. Treatments were arranged in a RCBD with 4 replications. Applications were made with a high-clearance sprayer to deliver 8 gal/acre using TeeJet TX10 hollow cone tip nozzles on 18-inch spacing at 55 psi at 5 mph. Water pH was 7.2-7.4 and Prime Oil was used as a spreader/sticker at recommended rates. Foliar treatments were applied 4 times (16, 22 Jun and 9, 13 Jul) followed by 6 weekly applications of Karate starting 21 Jul in order to preserve the results of the microbial treatments. Treatments were evaluated 4 times (21, 25 Jun and 12, 16 Jul) at 3-5 DAT for the presence of eggs, larvae, and terminal damage by sampling 25 terminals in the middle 4 rows/plot. Yields were taken by mechanically harvesting the middle 2 rows/plot on 22 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 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 Impact of Insecticides Alone and in Rotation on Tomato Pinworm, Leafminer and Beneficial Arthro-Pods on Staked Tomato, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 162-165 ◽  
Author(s):  
P. A. Stansly ◽  
J. M. Conner
Keyword(s):  
Disease Control ◽  
Methyl Bromide ◽  
Polyethylene Film ◽  
Trap Catch ◽  
Hollow Cone ◽  
Sticky Traps ◽  
Untreated Check ◽  
Pre Treatment ◽  
Marketable Fruit ◽  
Tomato Pinworm

Abstract Greenhouse-raised tomato seedings were planted 18 inches apart on 4 sets of 3 subirrigated beds, 32 inches wide and 240 ft long, on 12 Mar. Beds were fumigated with a 67/33% mixture of methyl bromide and chloropicrin at a rate of 220 lb acre, fertilized, and covered with black polyethylene film mulch. The middle ‘inoculum’ row of each 3-bed set was left untreated. The remaining 2 beds in each set were divided into 8 plots about 30 ft long to accommodate 14 treatments and untreated check in a RCB design replicated 4 times. Plants were sprayed weekly with a combination of Maneb 80 WP at 1 lb/acre plus Kocide 101 at 3 lb/acre for disease control. Two wing-type sticky traps, baited with TPW pheromone (Scentry) lures placed in the field to monitor the pinworm population, showed peaks on four dates 3,4, 25 Apr and 2 May when the daily trap catch was 21, 26, 30, and 32, respectively. All other dates had a daily trap average of less than 10. Pre-treatment means of 20.5 LM and 3.4 PW mines/plant were recorded on 11 Apr. Seven weekly treatments were applied from 14 Apr through 30 May using a high-clearance sprayer with 2 booms fitted with “yellow” Albuz® hollow-cone nozzles operating at a pressure of 200 psi. The first 2 applications used 4 nozzles, 2 per boom, to deliver 42 gpa and the last five used 6 nozzles for 65 gpa. Three treatments con-sisted of SpinTor applied for 2 weeks followed by an application of Trigard, Agri-Mek, or Mattch. RH-2485 and Confirm were tank mixed with the adjuvant Latron CS-7 (0.12% v/v). Five weekly counts were made of dead/empty mines and live larvae of the LM and PW from one side of two plants, 4 samples per plot. Weekly vacuum samples of 4 sees from one side of 6 plants were taken beginning 17 Apr using a modified leaf blower. Catch was identified as beneficial (primarily spiders, hymenoptera exclusive of ants and predaceous hemiptera), pests and incidental (mostly flies). Fruit was harvested 3 Jun from 6 plants per plot and the marketable fruit graded on a commercial table with weights and numbers recorded. Unmarketable fruit was separated into categories of infestation with TPW, other insects and disease. Crop value was estimated based on $5,6,7,9 market per box of small, medium, large, and extra large fruit, 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 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 Efficacy of Selected Conventional and Experimental Insecticides and Bt Hybrids for Control of Corn Earworm and European Corn Borer on Sweet Corn, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 99-100
Author(s):  
J. T. Shaw ◽  
R. Weinzierl ◽  
J. W. Finger
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Earworm ◽  
Compressed Air ◽  
Hollow Cone ◽  
Corn Hybrids ◽  
Corn Borer ◽  
Chemical Treatments ◽  
Untreated Check ◽  
High Clearance

Abstract The tests were arranged in a RCB design with four replications. Each plot consisted of four rows, each being 30 inches wide and 50 ft long. Thirty-foot-wide alleys were established between the four replications. Insecticides were applied to the middle two rows of each plot, leaving two untreated rows between adjoining plots. Twelve insecticide treatments were compared with two Br-sweet corn hybrids (Heritage Bt and Bonus Bt) and their non-Bt isolines to two untreated controls. The 12 chemical treatments and the two untreated checks were planted with the Silver King variety sweet corn. Two untreated check plots were included in each replication and were averaged for the ANOVA. Treatments were applied very four to five days beginning on 8 Aug at 8% silk. All insecticide treatments were applied with a modified John Deere 6000 high-clearance vehicle (HCV) with a rear-mounted boom. Six Conejet (TX VS-8) hollow-cone nozzles (three per row) were calibrated to deliver 30.1 gpa at 40 psi and a speed of 2.5 mph, utilizing a compressed air system. Four nozzles (two per row) were attached to drops and directed the spray towards the ear zone area, a third nozzle (one per row) was mounted directly over the row with the spray being directed into the whorl (tassel) area.

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.

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