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

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.

scholarly journals Management of the Tobacco Aphid and Tobacco Budworm on Flue-Cured Tobacco, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 289-289
Author(s):  
Paul J. Semtner ◽  
W. B. Wilkinson
Keyword(s):  
Count Data ◽  
Agricultural Research ◽  
Block Design ◽  
Cooperative Extension Service ◽  
Tobacco Budworm ◽  
Extension Service ◽  
Randomized Complete Block Design ◽  
Production Practices ◽  
Extension Center ◽  
Experimental Plots

Abstract This experiment was conducted at the VPI and SU Southern Piedmont Agricultural Research and Extension Center, Blackstone, VA, to evaluate TA and TBW control on flue-cured tobacco with various combinations of foliar and soil-applied systemic insecticides. Tobacco was transplanted into experimental plots, 8 X 40 ft (2 rows × 24 plants), 12 May. Ten treatments were established in a randomized complete block design with 4 replications. The Temik soil treatments were applied in 14-inch bands using a tractor-mounted Gandy granular applicator and immediately covered with 6 inches of soil during bed formation on 11 May. Foliar treatments were applied on 9 and 30 Jul using a CO2-pressurized backpack sprayer that delivered 27 gpa at 60 psi through 3, TX-10 nozzles/row. Production practices followed Virginia Cooperative Extension Service recommendations except for insect control. TA populations were estimated on the upper 4 leaves of 10 plants per plot before foliar treatments were applied and at 3, 7, 12, and 20 d after the first application and 4 and 11 d after the second application. TBW were reared in the laboratory on artificial media for 7 d and released at one BW/plant on 20 consecutive plants in the second row of each plot on 6 Jul. TBW on the infested plants were counted on the d before treatment and at 3, 6, and 12 DAT. Leaves were harvested, cured, weighed, and graded by a USDA/AMS inspector. This information was used to calculated tobacco yield and price. Data were analyzed by ANOVA and significantly different means were separated by DMRT. TA count data were transformed to Log10 (x + 1) and TBW counts were transformed to SQRT (x + 0.5) before ANOVA.

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.

Foliar Sprays to Control European Corn Borer in Spring and Fall Peppers, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 119-120
Author(s):  
John Speese ◽  
Brian A. Nault
Keyword(s):  
European Corn Borer ◽  
Agricultural Research ◽  
Corn Borer ◽  
Spring Crop ◽  
Harvest Dates ◽  
Plant Stand ◽  
Crop Harvest ◽  
Marketable Fruit ◽  
Extension Center ◽  
Plant Basis

Abstract Peppers were transplanted on 23 May (spring crop) and 1 Aug (fall crop) at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 20-ft-rows with 3-ft spacing between rows. Plots were separated from each other by an untreated guard row. Each treatment was replicated 4 times in a RCBD for both plantings. Sprays were applied with a propane-powered backpack sprayer using 6 flat-fan nozzles/2 rows and delivering 46 gal of spray/acre at 40 psi. Latron CS-7 was used with each application at 0.12% vol./vol. Weekly applications were made on both crops beginning when fruit was ≥2 inches in diameter. The spring crop was sprayed from 31 Jul-10 Sep (6 sprays), and the fall crop was sprayed from 17 Sep-8 Oct (4 sprays). To evaluate efficacy of the treatments, the market-sized fruit was harvested from the most uniform row and examined for ECB damage. The number and weight of undamaged (marketable) fruit, and the number of ECB damaged fruit, were recorded for each crop. Harvest dates are indicated in the tables. Plant stand counts were taken in all harvested rows, and yields and % damaged fruit were adjusted to a per plant basis.

scholarly journals Evaluation of New Foliar Materials to Control Insects on Potatoes, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 128-129
Author(s):  
Brian A. Nault ◽  
John Speese
Keyword(s):  
Agricultural Research ◽  
Visual Estimation ◽  
Eastern Shore ◽  
Bare Ground ◽  
Egg Masses ◽  
Insecticide Application ◽  
Untreated Check ◽  
Extension Center

Abstract Potatoes were planted on 3 Apr at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of four 20-ft-long rows. Plots were separated across rows by 3 ft and within rows by 6 ft of bare ground. The experiment had 5 treatments plus an untreated check arranged in a RCB design replicated 4 times. Insecticide application timings were targeted for control of CPB, not ECB. Initial applications were made on 29 May when small (LI + L2) and large (L3 + L4) CPB larvae were present and many of the egg masses in the field had hatched. One additional application of each treatment was made on 12 Jun. Insecticides were applied using a propane-powered backpack sprayer equipped with 6 flat-fan nozzles/2 rows calibrated to deliver 46 gpa at 40 psi. On 13 Jun and 1 Jul, potato leafhoppers, Empoascafabae, were controlled with Dimethoate 4EC at 0.25 lb (AI)/acre using a tractor-mounted sprayer that deliv-ered 40 gal. of spray/acre at 100 psi. Data were taken weekly from 3 through 30 Jun from the center 2 rows of each plot and included the following: the number of CPB adults, egg masses, small and large larvae/10 randomly selected stems in each plot, the number of ECB damaged stems/20 randomly chosen stems per plot, and a visual estimation of percent defoliation within each plot. The center 2 rows of each plot were harvested on 10 Jul and tubers were graded and weighed.

scholarly journals Control of a Sharpshooter with Exp 80698A and Karate, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 273-273
Author(s):  
M. O. Way ◽  
R. G. Wallace
Keyword(s):  
Relative Humidity ◽  
Plant Density ◽  
Agricultural Research ◽  
Experimental Unit ◽  
Seeding Rate ◽  
Plastic Cylinder ◽  
Spray Volume ◽  
Extension Center ◽  
Sweep Net

Abstract The experiment was conducted in a greenhouse at the TAMU Agricultural Research and Extension Center at Beaumont and was designed as a RCB with 6 treatments and 4 replications. The greenhouse was maintained at 31° C, 70% relative humidity, and 12 h light:12 h dark. Each experimental unit was a pot (6 inch diam X 6 inch deep) filled with sifted League soil. On 30 Sep, selected pots were planted with 8 untreated or EXP 80698A 75 FS-treated seeds. Seeds were treated at the rates shown in the table using the “Le Sak” method developed by Rhone-Poulenc Ag Company. On the same day, selected pots were sprayed with EXP 80698A 75 FS at the rates shown in the table using a 4 nozzle (800067 tip size, 50 mesh screens), hand-held spray rig pressurized with CO2. Final spray volume was 9.0 gpa. On the same day, pots were fertilized with urea at 51 lb nitrogen/acre. Immediately following planting, and spraying, soil in each pot was “raked” with forceps to simulate incorporation. On 5 Oct, rice emerged through soil. On 21 Oct, selected pots were treated with Karate at the rate shown in the table using the same spray rig and final spray volume as before. Immediately after spraying Karate, a plastic cylinder was placed over 2 plants in each pot. Cylinders were 3 inch in diam so that the plant density within a cylinder was equal to a seeding rate of 90 lb/acre, given 100% emergence and survival of seeds. The cylinders were ventilated with screen windows and tops. After securing the cylinders, which served as cages, each was infested on 21 (Oct 17 d after emergence of rice through soil) with 5 adult sharpshooters. Insects were collected from untreated rice using a sweep net. Two d later, cages were inspected for live and dead sharpshooters. Data were expressed as % mortality which was transformed using arcsine. Transformed data were then analyzed by 2-way ANOVA and means separated by DMRT.

scholarly journals Tobacco Aphid Control in Flue-Cured Tobacco, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 325-326
Author(s):  
Bert D. Crowe ◽  
J. Delano Taylor ◽  
Robert M. McPherson ◽  
M. Leonard Wells
Keyword(s):  
Aphid Control ◽  
Tobacco Aphid

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

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

scholarly journals Control of Rice Water Weevil with Karate 1Ec, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 282-283
Author(s):  
M. O. Way ◽  
R. G. Wallace
Keyword(s):  
Rice Plant ◽  
Agricultural Research ◽  
Soil Cores ◽  
Deep Soil ◽  
Flood Depth ◽  
Mesh Screen ◽  
Spray Volume ◽  
Rice Water ◽  
Extension Center ◽  
Metal Barrier

Abstract The experiments were conducted at the TAMU Agricultural Research and Extension Center at Beaumont. Experiment I was water-seeded rice with continuous flood. The experiment was designed as a RCB with 6 treatments and 4 replications. Each plot was 15 ft X 8 ft and was surrounded by a metal barrier to prevent movement of insecticide. On 12 May plots were treated with Ordram 1 at 27 lb/acre and fertilized with urea at 110.5 lb N/acre followed by a light incorporation into dry, cloddy soil (League) with a rake. Plots were then flooded and sown (12 May) with presprouted Gulfmont seed at 130 lb dry seed/acre. To prepare presprouted seed, dry seed was soaked in water for 24 h then drained and allowed to air dry for 24 h before planting. Flood depth was about 4 inches and rice emerged through water 18 May–6 d after planting. Karate treatments were applied with a 4 nozzle (tip size 800067, 50 mesh screen), hand-held, CO2 pressurized spray rig. Final spray volume was 30 gpa. Furadan was applied with a hand-held shaker jar at the rate and time shown in Table 1. On 12 Jun (25 d after emergence of rice through water) 5, 4 inch diam X 4 inch deep soil cores (each core contained at least 1 rice plant) were removed from each plot, washed, and immature RWW recovered. At maturity (24 Aug) plots were harvested with a small combine and yields adjusted to 12% moisture. Insect counts were transformed using x+0.5 and all data analyzed by 2 way ANOVA and, where appropriate, DMRT.

scholarly journals Insect Control on Flue-Cured Tobacco with Systemic Insecticides, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 258-259
Author(s):  
Paul J. Semtner ◽  
William B. Wilkinson III
Keyword(s):  
Agricultural Research ◽  
Sandy Loam ◽  
Block Design ◽  
Calculated Data ◽  
Sooty Mold ◽  
Systemic Insecticides ◽  
Loam Soil ◽  
Extension Center ◽  
Water Treatments ◽  
The Impact

Abstract This experiment was conducted to evaluate various systemic insecticides applied as soil or transplant water treatments followed by foliar applications of Orthene for TA and TFB control on fluecured tobacco and to determine the impact of treatment on tobacco yield and price. The experiment was conducted at the VPI & SU Southern Piedmont Agricultural Research and Extension Center, Blackstone, VA. Eleven treatments and an untreated control were established in a randomized complete block design with 4 replications. Plots, 4 × 40 ft (1 row × 24 plants), were separated by single guard rows. Pretransplant soil treatments of most liquid formulations were applied broadcast with a CO2-pressurized tractor sprayer that delivered 30.4 gal/acre at 40 psi through 8003LP tips on 29 Apr (Ambient temperature, 85-89°F, soil temperature, 75°F; soil pH, 5.8; OM, 2%). Treatments were immediately incorporated by double disking. The Furadan and Temik treatments were applied during bed formation and immediately covered with 6 to 8 inches of soil on 17 May. Furadan 4F was diluted 50:50 in water and applied in a narrow stream (< 1-inch wide) in the row using a peristaltic pump. Temik was applied in a 14 inch band using a tractor mounted- Gandy granular applicator. The soil moisture was good for both the pretransplant soil and bedding treatments. ‘K-326’ flue-cured tobacco was transplanted into experimental plots in a Chesterfield-Mayodan-Bourne sandy loam soil on 18 May. A measuring cup was used to apply transplant water (TPW) treatments of Orthene and Admire in 4 fl oz/plant (204 gal/acre) at the base of each plant in the treatment plots. Virginia Cooperative Extension recommendations were followed for production of the crop. Foliar applications of Orthene and Dipel were applied on 6 Jul with a CO2-pressurized backpack sprayer that delivered 30 gal/acre through 3 TX-12 tips at 60 psi. TA populations were estimated on the upper 4 leaves of 10 plants/plot about once a week from 5 to 11 wk after transplanting. On 25 Aug, TA damage was rated on a scale of 0 to 10 where 0 = no aphid damage or sooty mold and 10 = very severe necrosis of leaves and extensive sooty mold. TFB and TFB feeding holes in the most damaged leaf were counted on 10 plants/ plot. Tobacco was harvested as it ripened, weighed, graded by a USDA/AMS inspector, and yield and price were calculated. Data were analyzed by ANOVA and significantly different means were separated by WD (K-ratio = 100). Aphid count data were transformed to Log10(x + 1) before analysis.

scholarly journals The Effect of Applying Exogenous Salicylic Acid on Aphid Infection and its Influence on Histo-Physiological Traits and Thermal Imaging of Canola

2016 ◽  
Vol 49 (2) ◽  
pp. 67-85 ◽  
Author(s):  
M.A.M. Elhamahmy ◽  
M.F. Mahmoud ◽  
T.Y. Bayoumi
Keyword(s):  
Salicylic Acid ◽  
Foliar Application ◽  
Growth And Yield ◽  
Brassica Napus L ◽  
Aphid Infestation ◽  
Aphid Control ◽  
Xylem Tissue ◽  
Secretory Tissue ◽  
Four Levels ◽  
Aphid Populations

Abstract Insect damage in canola adversely affects its productivity andquality and is considered one of the most important degrading factors in Egypt. The effect of foliar application of salicylic acid (SA) on aphid populations, growth and yield of canola (Brassica napus, L.) cv. serw 4 was the major goal of this study. Two experiments were conducted at the farm of Faculty of Agriculture, Suez Canal University, Ismailia, Egypt, during 2014 and 2015 seasons, to achieve this target. Each experiment included four levels of SA (0, 50, 100, 200 mg 1-1). The experimental results revealed that SA, at low concentration (50 mg 1-1), was an effective treatment for reduction the number of aphid populations and colony depth on the main inflorescence, contributed with reducing the thickness of secretory tissue of flower pedicel. The level of 50 mg 1-1 of SA-treated canola had the highest number of stomata cm-2, along with the lowest width of both stoma and its aperture. Thickness of xylem tissue and the number of xylem vessels bundle-1 in leaf midrib, reducing sugars and free amino acids was increased at 50 mg 1-1 SA, but free phenolics content did not affected significantly. Under controlled conditions, changes in temperature of infected leaves allowed the discrimination between healthy and infected areas in thermo-image, even before visible symptoms of aphid infestation appeared. The detection of modifications in plants or canopies, associated with low insect severity in the early stages of infestation, was crucial for the targeted, site-specific or on demand application of integrated aphid control. Canola, which was treated with 50 mg 1-1 of SA, gave 30.5 and 27.9 kg of oil ha-1 over the control. It was concluded that spraying of SA at 50 mg 1-1 was an effective elicitor to diminish the aphid numbers on canola inflorescence and improve its yield.

Sign in / Sign up

Export Citation Format

Share Document