scholarly journals Lepidopterous Larvae Control with Insecticides, Pasquotank Co., N.C., 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 99-99
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
Hollow Cone ◽  
Single Row ◽  
Foliar Damage ◽  
Direct Seeded

Abstract ‘Gourmet’ cabbage was direct seeded in early Mar near Weeksville, NC. Single row plots 10 ft. long on 42 inch centers were replicated 4 times in a RCB design. Alleys of 5 ft. were used between replicates. Treatments were applied with a CO2 pressurized backpack sprayer using a single hollow cone nozzle (18X) operating at 60 psi to deliver 54.5 gal/acre. Applications with Triton AG-98 (spreader) were made with all treatments 2, 9, 16 and 23 May. Visual estimates of foliar damage and insect counts were made 9, 16, 23 and 30 May. No CL were present on 9 and 16 May.

scholarly journals Control of Lepidopterous Larvae with Insecticides, Pasquotank Co., NC, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 78-78
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
Block Design ◽  
Hollow Cone ◽  
Single Row ◽  
Randomized Complete Block Design ◽  
Foliar Damage

Abstract ‘Blue Vantage’ cabbage was transplanted in late Jul near Weeksville, NC. Single row plots, 10 ft long on 42 inch centers were replicated 4 times in a randomized complete block design. Alleys of 5 ft were used between replicates. Treatments were applied with a CO2 pressurized backsprayer using a single hollow cone nozzle (18X) operating at 60 psi to deliver 54.5 gpa. Applications with Trigard AG-98 (spreader) were made with all treatments 22 Aug and 13, 20, and 27 Sep. No applications were applied between 22 Aug and 13 Sep. Counts were extremely low, and we allowed the DBM and CL populations to increase. A slight increase occurred and we applied treatments on 13 Sep. Visual estimates of foliar damage and insect counts were made 20 and 27 Sep and 3 Oct. No insects were present on 3 Oct.

scholarly journals Insecticidal Control of Fall Armyworm, Corn Earworm, and Corn Silkfly on Sweetcorn, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 103-103
Author(s):  
P. A. Stansly ◽  
J. M. Conner
Keyword(s):  
Fall Armyworm ◽  
Corn Earworm ◽  
Total Loss ◽  
Total Weight ◽  
Hollow Cone ◽  
Single Row ◽  
Foliar Damage ◽  
Delivery Pressure ◽  
Pre Treatment ◽  
Polyethylene Mulch

Abstract Six raised beds, 32 inches wide and 240 ft long on 6 ft centers, were prepared in a semiclosed subirrigated field: They were fumigated with 67/33% methyl bro-mide/chloropicrin at 220 lbs/acre, fertilized with a bottom mix of 700 lb/acre 5-16-8 and 250 lb/acre at 19-0-19 lb/acre top mix laid in 2 bands 4 inches in from the edge on each side of the bed and covered with black polyethylene mulch. An additional 40 lb of N/acre of 6-2-6 was injected on 16 May. Beds were divided into two, 3-row sets separated by a 15-ft roadway. The center row of each 3-row set was planted on 10 Mar to provide pest inoculum. The remaining 4 rows were each divided into 5 single row plots in a RCB design with 4 replications and planted 23 Apr by hand at 10 inch spacing. Five weekly applications were initiated 20 May using a high clearance sprayer equipped with 2 overhead nozzles fitted with ceramic Albuz “yellow” hollow cone noz-zles per row with delivery pressure of 200 psi at a rate of 22 gpa. A pre-treatment sample of 100 plants per block and 60 ears per inoculum row on 16 May showed that 24% plants were damaged (primarily by FAW) and 85% ears had CEW and 33% FAW. Foliar damage was evaluated weekly for 3 weeks on 20 randomly selected plants per plot after the initiation of the treatments. Damage was assessed as a percentage of the total loss from the top three leaves in the whorl. The number and size (in 3 categories) of larvae in each whorl was noted. Ears were harvested on 20 and 26 Jun from the same 20 plants in the center of each plot. Ears were evaluated for marketability noting total weight of ears in each category. Nonmarketable ears were further examined and any larvae present identified to species.

scholarly journals Comparison of Pymetrozine (Cga 215944) and Imidacloprid (Provado) Foliar Sprays to Control Aphids in Tomatoes, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 185-185
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Test Field ◽  
Single Application ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Potato Aphid ◽  
Single Row ◽  
Foliar Sprays ◽  
Extension Center ◽  
Aphid Populations

Abstract Tomatoes were transplanted on 9 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single row 20 ft X 5 ft, bordered on each side by an untreated guard row. On 1 Oct, heavy potato aphid populations developed in the test field. A pre-count of live aphids on 5 randomly picked compound leaves/plot was taken on this date and followed by a single application of all treatments. Treatments were applied with a backpack sprayer equipped with a 3 hollow cone nozzle boom and delivering 46 gal water/acre at 40 psi. To evaluate efficacy, the plots were sampled as previously described for the pre-count on the dates indicated in the table.

scholarly journals Control of Aphids on Mustard in a Commercial Field, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 137-137
Author(s):  
J. V. Edelson ◽  
M. Peters
Keyword(s):  
Experimental Design ◽  
Treatment Effects ◽  
Commercial Production ◽  
Hollow Cone ◽  
Insect Populations ◽  
Direct Seeded ◽  
Commercial Field

Abstract A commercial production field of mustard was used for this trial. Plants were grown in 6 row beds on 6 ft centers. The field was direct seeded in Apr approximately 1 mile west of Webbers Falls, OK. Small plots were delimited on one edge of the field. The experimental design was a RCB with 4 replicates and 7 treatments. Insecticide applications were made on 23 and 29 May using a bicycle tire mounted sprayer with 4 hollow cone nozzles (TXVS26) per bed applying 40 gpa solution at 42 psi. Plots were 1 bed wide and 20 ft long with 5 ft alleys between plots. Insect populations were surveyed by examining 5 plants per plot on 29 May (prior to the second application of insecticides) and 3 Jun to determine treatment effects.

scholarly journals Control of Pickleworm on Squash with Selective Insecticides, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 142-143
Author(s):  
Susan E. Webb
Keyword(s):  
Analysis Of Variance ◽  
Hollow Cone ◽  
Central Florida ◽  
Lepidopterous Pest ◽  
Untreated Check ◽  
Direct Seeded ◽  
Research And Education ◽  
Selective Insecticides ◽  
Separation Test

Abstract Insecticides specific for lepidopterous pest-were compared with a standard, Thiodan, and an untreated check for control of pickleworm. Squash was direct seeded on 1 Apr at the Central Florida Research and Education Center, Leesburg, FL. Each plot consisted of four 25-ft rows, 6 ft apart with plants spaced 2.5 ft apart. Treatments were replicated four times in an RCB design. All chemicals were applied with a 2-row tractor-mounted boom sprayer with 18 Albuz (lilac) ceramic hollow-cone nozzles spaced 8 inches apart, delivering 133 gpa at 200 psi. Latron CS-7, a surfactant, was tank-mixed with Confirm and RH-2485 at a concentration of 0.12% vol:vol. Treatments were applied weekly from 14 May to 11 Jun. Fruits were harvested, separated into marketable and damaged, counted, and weighed three times per week from 12 May to 16 Jun. An analysis of variance and a mean separation test (WD) were used to determine significant differences among treatments.

scholarly journals Control of Aphids on Spinach with Imidacloprid and Other Treatments, 1996

1998 ◽  
Vol 23 (1) ◽  
pp. 138-139 ◽  
Author(s):  
David Riley
Keyword(s):  
Analysis Of Variance ◽  
Cultural Practices ◽  
Hollow Cone ◽  
Fresh Market ◽  
Foliar Sprays ◽  
Direct Seeded ◽  
Spray Volume ◽  
Spray Applications

Abstract Fresh-market type ‘Fall Green’ spinach, was direct seeded on 11 Oct 1995 in 100-cm-width beds and maintained with standard cultural practices at Weslaco, TX. Plots consisted of two rows by 10 m and were arranged in a RCB design with six treatments and four replicates. Admire (imidacloprid) was applied at planting as an 8-cm banded spray in the seed furrow. All other insecticide treatments were foliar sprays which were initiated when aphid numbers exceeded 1 per leaf. Spray applications were made on January 16, 23 and February 14 with three TX6 hollow-cone tips (Spraying Systems Company) per row. The spray volume was 284 ]/ha. Aphids were counted on one expanded leaf per plant on 5 plants per plot. An additional destructive sample was taken at harvest on 8 and 16 Feb to determine the number of gpa per 10 leaves per plot and number of root aphids per 5 mechanically extracted tap roots. Data were subjected to analysis of variance and LSD tests for separation of treatment means.

scholarly journals Corn Earworm and European Corn Borer Control with Insecticides, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 102-102
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Earworm ◽  
Hollow Cone ◽  
Corn Borer ◽  
Single Row ◽  
Untreated Area

Abstract ‘Golden Queen’ sweet corn was seeded on 22 I Apr near Calabash, NC in Brunswick Co. Single-row plots, 10 ft long on 42-inch centers, were replicated 4 times in a RCB design. Alleys of 5 ft were used I between replicates. Treatments were applied with a CO2-pressurized backpack sprayer using a single hollow-cone nozzle (18X) operating at 60 psi to deliver 54.5 gpa. Test 1 and Test 2 were in the same field with a 75 ft spacing of untreated area between the two test sites. Applications were made to both Test 1 and Test 2 twice a week on 27 and 30 Jun, and 3, 7, 10, 14, and 17 Jul. Insect-damaged ears were assayed on 21 Jul when all ears were harvested from both tests.

scholarly journals Efficacy of Bacillus Thuringensis for Control of Lepidopterous Larvae in Lettuce, 1994

1996 ◽  
Vol 21 (1) ◽  
pp. 120-121
Author(s):  
D. L. Kerns
Keyword(s):  
Hollow Cone ◽  
Direct Seeded ◽  
Bacillus Thuringensis ◽  
All Treatment

Abstract Lettuce was direct seeded into double-rows on 42-in beds on Sep 4 at the Yuma Valley Agricultural Center, Yuma, AZ. Plots were four beds wide by 30 ft long. Each plot was bordered on each side by two blank beds. Plots were arranged in a RCB design with four replicates. Treatments were applied using a tractor-mounted sprayer with two TX-18 hollow cone nozzles per bed, calibrated to deliver 60 gal/acre at 300 psi. All treatment applications included Dyne-Amic spreader-sticker at 0.25% v/v. Treatments were applied on Sep 28, Oct 10 and Oct 17. Evaluations were made four to six days after treatment (Sep 26, Oct 3, Oct 10 and Oct 17) by randomly selecting ten plants per plot and counting the number of live large (>2nd instar) BAW and CL larvae. Data were analyzed for treatment differences using ANOVA and an F protected LSD.

scholarly journals Control of Lepidopterous Larvae in Lettuce, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 119-119
Author(s):  
D. L. Kerns
Keyword(s):  
Hollow Cone ◽  
Direct Seeded ◽  
All Treatment

Abstract Lettuce was direct seeded into double-rows on 40-in beds on 6 Sep at the Yuma Valley Agricultural Center, Yuma, AZ. Plots were four beds wide by 30 ft long. Each plot was bordered on each side by two blank beds. Plots were arranged in a RCB design with four replicates. Treatments were applied using a tractor-mounted sprayer with three TX-6 hollow cone nozzles per bed, calibrated to deliver 40 gal/acre at 200 psi. All treatment applications included Kinetic spreader-sticker at 0.05% v/v. Treatments were applied on 21 Sep, 28 Sep, 6 Oct, 14 Oct, 19 Oct and 26 Oct. Evaluations were made five days after each treatment (26 Sep, 3 Oct, 11 Oct, 19 Oct, 24 Oct and 31 Oct) by randomly selecting 25 plants per plot and counting the number of live small (1st and 2nd instar) and large (>2nd instar) BAW and CL larvae. Data were analyzed for treatment differences using ANOVA and an F protected LSD.

scholarly journals Evaluation of Insecticides for Control of Lepidopterous Larvae in Lettuce, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 93-93
Author(s):  
J. C. Palumbo
Keyword(s):  
Block Design ◽  
Hollow Cone ◽  
Double Row ◽  
Randomized Block Design ◽  
Direct Seeded

Abstract Lettuce was direct seeded into double-row beds on 12 Sep at the Yuma Valley Agricultural Center, Yuma, AZ. Plots consisted of four, 45 ft long beds spaced 42 inches apart and bordered on each side by two unplanted beds. Plots were arranged in a completely randomized block design with 4 replicates. Foliar treatments were applied on 7 and 12 Oct with a CO2-powered backpack sprayer with a two-bed boom, having one nozzle per row (TX 12 hollow cone), and delivering 20.5 gal/acre at 40 psi. Latron CS-7 spreader-sticker was applied at 0.125% v/v with all treatments. Evaluations were made on 7, 12, and 17 Oct by selecting 15 plants per replicate, removing all leaves, and counting the total number of small (1st and 2nd instars) and large (>2nd instar) BAW, CL and TBW live larvae. Data were analyzed for treatment differences using ANOVA and a protected LSD.

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