Tobacco Aphid Control in Flue-Cured Tobacco, 1996

Bert D. Crowe; J. Delano Taylor; Robert M. McPherson; M. Leonard Wells

doi:10.1093/amt/22.1.325a

Tobacco Aphid Control on Flue-Cured Tobacco with Foliar Insecticides, 1994

Arthropod Management Tests ◽

10.1093/amt/20.1.263 ◽

1995 ◽

Vol 20 (1) ◽

pp. 263-263

Author(s):

Paul J. Semtner ◽

Surendra K. Dara ◽

William B. Wilkinson III

Keyword(s):

Aphid Control ◽

Tobacco Aphid

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Tobacco Aphid Control on Flue-Cured Tobacco with Foliar Insecticides, 1993

Arthropod Management Tests ◽

10.1093/amt/19.1.285 ◽

1994 ◽

Vol 19 (1) ◽

pp. 285-285

Author(s):

Paul J. Semtner ◽

William B. Wilkinson III

Keyword(s):

Agricultural Research ◽

Cooperative Extension Service ◽

Market Prices ◽

Production Methods ◽

Tobacco Production ◽

Aphid Control ◽

Extension Center ◽

Experimental Plots ◽

Aphid Populations ◽

Tobacco Aphid

Abstract This experiment was conducted at the VPI and SU Southern Piedmont Agricultural Research and Extension Center, Blackstone, VA, to evaluate various insecticides applied as foliar treatments for tobacco aphid control on flue-cured tobacco. Tobacco was transplanted into experimental plots on 12 May. Fourteen treatments and an untreated control were established in a RCBD with 4 replications. Plots, 4 × 40 ft (1 row × 24 plants), were separated by single untreated guard rows. Foliar treatments were applied with a CO2-pressurized backpack sprayer that delivered 26 gpa at 60 psi through 3 TX-lO nozzles/row on 9 Jul and 16 Aug. Tobacco aphid populations were estimated on the upper 4 leaves of 10 plants per plot before treatment and at 3, 6, 12, and 20 DAT. Except for insect control, flue-cured tobacco production methods followed recommendations by the Virginia Cooperative Extension Service. Tobacco was harvested as it ripened. It was cured, weighed, and graded by a USDA/AMS inspector, and yield and price were calculated. Price was based on 1993 market prices for the assigned grades. Data were analyzed by ANOVA and significantly different means were separated using DMRT. Aphid counts were transformed to Log10 (x + 1) before ANOVA. Actual means are presented in the table.

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Tobacco Aphid Control on Burley Tobacco with Transplant Water and Foliar Treatments, 1995

Arthropod Management Tests ◽

10.1093/amt/21.1.312 ◽

1996 ◽

Vol 21 (1) ◽

pp. 312-312

Author(s):

Paul J. Semtner ◽

Surendra K. Dara ◽

William B. Wilkinson

Keyword(s):

Burley Tobacco ◽

Aphid Control ◽

Tobacco Aphid

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Evaluation of Admire for Tobacco Aphid Control on Connecticut Broadleaf Tobacco, 1994

Arthropod Management Tests ◽

10.1093/amt/21.1.304a ◽

1996 ◽

Vol 21 (1) ◽

pp. 304-305

Author(s):

James A. LaMondia ◽

Thomas M. Rathier

Keyword(s):

Aphid Control ◽

Tobacco Aphid

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Tobacco Aphid Control on Flue-Cured Tobacco with Foliar Insecticides, 1996

Arthropod Management Tests ◽

10.1093/amt/22.1.329 ◽

1997 ◽

Vol 22 (1) ◽

pp. 329-329

Author(s):

P. Sterling Southern ◽

Micou M. Browne

Keyword(s):

Analysis Of Variance ◽

Air Temperature ◽

Quality Index ◽

T Test ◽

Square Root ◽

Hollow Cone ◽

Roller Pump ◽

Aphid Infestation ◽

Aphid Control ◽

Tobacco Aphid

Abstract Flue-cured tobacco was planted on the Casey farm in Johnston Co., NC on 3 May. Plots of 0.02 acre (4 rows X 57 ft) were separated laterally by a vacant 5th row and on each end by turn alleys of 16 ft. Treatments were established in a RCB design with 4 replications. Treatments were applied 21 Jun using a tractor mounted sprayer pressurized by a PTO-powered roller pump. Spray was delivered through 3 hollow-cone nozzles (TX-12) per row at 60 psi and 36.5 gpa. Treatments were applied between 9:30 am and 11:30 am EDT. Air temperature was 80-84° F and winds were light (3-5 mph). All plants (excluding the first and last) in rows 1 and 3 were checked for aphid infestation on the day of treatment and 5 and 12 DAT. Individual plants were rated for degree of aphid infestation as follows: 0 = no aphids on plant; 1 = 1-10 aphids on most infested leaf (MIL); 2 = 11-50 aphids MIL; 3 = 51-200 aphids MIL; 4 = 201-500 aphids MIL; 5 = 500+ aphids MIL. Average infestation ratings were calculated by plot. The proportion of plants infested (rated 3 or above) was also calculated. After harvest and curing, tobacco from each plot was weighed and graded by a government grader. Grades were converted to a quality index (1-100, 100 high). All variables were subjected to analysis of variance and treatment means were compared (where appropriate) using the LSD t-test. Before analysis, the proportion of plants infested was transformed to the arcsine of the square root of the proportion. Data shown in the tables are not transformed and proportion of plants infested is presented as the percentage of plants infested.

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Tobacco Aphid Control on Flue-Cured Tobacco with Foliar Insecticides, 1995

Arthropod Management Tests ◽

10.1093/amt/21.1.310 ◽

1996 ◽

Vol 21 (1) ◽

pp. 310-311

Author(s):

Paul J. Semtner ◽

Surendra K. Dara ◽

William B. Wilkinson

Keyword(s):

Aphid Control ◽

Tobacco Aphid

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Evaluation of Application Method for Aphid Control by Imidacloprid on Connecticut Broadleaf Tobacco, 1997

Arthropod Management Tests ◽

10.1093/amt/23.1.289a ◽

1998 ◽

Vol 23 (1) ◽

pp. 289-290

Author(s):

James A. LaMondia ◽

Thomas M. Rathier

Keyword(s):

Cottonseed Meal ◽

Application Method ◽

Soil Drench ◽

Aphid Control ◽

Bonferroni Test ◽

Tobacco Aphid

Abstract Preplant broadcast, transplant, or band application at cultivation of Admire 2°F (imidacloprid) treatments were evaluated for tobacco aphid control at the CT Agricultural Expt. Station Valley Laboratory in Windsor CT. Admire 2°F was applied at 0.11 lb (AI)/acre (1 oz per 1000 plants based on 6,800 plants/acre) for all treatments. The soil was an Entic Haplorthod (71.8% sand, 23.0% silt, 5.2% clay, pH = 6.0 and OM = 4.0%). On 29 May, plots were fertilized with 145 lb N/acre of cottonseed meal-based 10-8-10. On 2 Jun, plots were treated with Lorsban 4 E at 1.5 lb (AI)/acre and Ridomil 2 E at 1 lb (AI)/acre and spiked. On 9 Jun, preplant Admire was broadcast to appropriate plots in a 39-inch swath using a TeeJet 8004 E nozzle at 18 to 20 psi and spiked to incorporate. Tobacco was transplanted on 10 Jun to rows 39 in apart with a 2-ft spacing within rows. There were 6 replicates of 2-row plots for each treatment (10 by 20-ft). Plots were separated by an umplanted border row. Plots were irrigated 10 Jun and 15 Jun with 0.5 and 0.4 inches water. Admire 2°F was applied on 11 Jun as a soil drench using a backpack sprayer with a TeeJet TG-3 nozzle at 15 psi to apply 20 ml/plant in 2 10-ml applications 2 cm to either side of plants. Admire 2°F was band applied at sidedress at 70 gpa to appropriate plots on 20 Jun (with 59 lb N/acre) or 30 Jun (with 69 lb N/acre) to 6 inches on either side of rows using a backpack sprayer with a TeeJet 8004-E nozzle and incorporated by mechanical cultivation. One leaf each from 10 plants per row was rated for apterous tobacco aphids on 23 Jul, 29 Jul, 7 Aug, and 14 Aug (scale: 0 = no aphids or winged only; 1 = 1 aphid per leaf; 2 = 2-10 aphids 3 = 11-100 aphids and 4 = more than 100 aphids per leaf). Treatments were compared within dates by the nonparametric Kruskal-Wallis Test and the Bonferroni Test. Ten plants per plot were stalk cut and weighed on 19 Aug.

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