scholarly journals Evaluation of Insecticides for Control of Aphids on Non-Transgenic Cotton, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 238-239
Author(s):  
Michael S. Howell ◽  
Jack T. Reed
Keyword(s):  
Water Samples ◽  
Growing Season ◽  
Transgenic Cotton ◽  
Row Spacing ◽  
Seed Cotton ◽  
Hollow Cone ◽  
Plot Size ◽  
Crop Development ◽  
Extension Center ◽  
High Clearance

Abstract Insecticides were evaluated at North Mississippi Research and Extension Center, Verona, MS, in a RCB design with 4 replications. Plot size was 4 rows wide (38-inch row spacing) by 50 ft long with 4 untreated rows between plots and a 10-ft planted buffer at the end of each plot. Insecticides were applied on 8 and 11 Jul with a high-clearance spray tractor equipped with two Spraying Systems TX4 hollow-cone nozzles per row and calibrated for 5 gpa at a pressure of 40 psi at 4 mph. Carrier of the insecticide was water. Samples were taken from 10 leaves per plot at each of two levels on the plant: upper (first fully expanded leaf), and mid (mainstem leaf located one-third down the plant). Aphids were counted on the underside of each leaf. Throughout the growing season, there was ad-equate rainfall for crop development. Yield (lb of seed cotton per acre) was determined by mechanically harvesting the center two rows of each plot, and measuring the actual area picked.

scholarly journals Evaluation of In-Furrow Insecticides for Control of Thrips on Cotton, 1997A

1998 ◽  
Vol 23 (1) ◽  
pp. 233-234
Author(s):  
Michael S. Howell ◽  
Jack T. Reed
Keyword(s):  
Filter Paper ◽  
Ground Level ◽  
Growing Season ◽  
Row Spacing ◽  
Seed Cotton ◽  
Liquid Fertilizer ◽  
Plot Size ◽  
The North ◽  
Extension Center

Abstract Insecticides were evaluated at the North Mississippi Research and Extension Center in Verona, Mississippi, in a RCB design with 4 replications. Plot size was 4 rows wide (38-inch row spacing) by fifty feet long. Insecticides applied in-furrow at planting on 12 May were applied with belt-cone applicators (Temik, Orthene, and Thimet treatments). On 15 Jul CGA-293343 5 FS was mixed with liquid fertilizer for one treatment, and knifed into the soil approximately 2 inches from the row. Five plants/plot were collected at random by cutting plants at ground level with scissors and gently placing them into Ziploc bags for transport to the lab. Thrips were than washed off the samples onto filter paper and were counted. Adults were identified to species under dissection microscope. During the evaluation, there was a total of 10.81 inches of rainfall, and adequate rainfall continued throughout the growing season. Yield (lb seed cotton/acre) was determined by mechanically harvesting the center 2 rows of each plot, and calculating yield based on measurement of the actual area picked.

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 Green Peach Aphid Control With Foliar Sprays, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 171-171
Author(s):  
Robert L. Stoltz ◽  
Nancy A. Matteson
Keyword(s):  
Green Peach Aphid ◽  
Sweet Pepper ◽  
Individual Treatment ◽  
Row Spacing ◽  
Silt Loam ◽  
Hollow Cone ◽  
Aphid Control ◽  
Untreated Check ◽  
Extension Center ◽  
Pepper Plants

Abstract Experimental plots were established on the UI Research and Extension Center, Kimberly, Idaho. Potatoes were planted on 25 Apr and irrigated by solid set sprinkler. The soil type was Portneuf silt loam. Four treatments and one untreated check plot were replicated four times in a RCB design. Individual treatment plots were 4 rows (36 inch row spacing) wide by 25 ft long with 5 ft alleyways separating the plots. Green peach aphids were mass reared on greenhouse sweet pepper plants (California Wonder) for release into individual plots. Aphid releases were made into test plots the last wk in Jun and again in the first wk of Jul. A total of four heavily infested pepper plants was released per plot. Treatment sprays were broadcast applied using a CO2 pressurized backpack sprayer (30 psi) and delivering 20 gal finished spray per acre (four, 10X hollow cone nozzles). Aphid counts were made from non-destructively examining 10 randomly selected leaves in the center two rows of each plot. Leaves were sampled from the top, middle, and bottom sections of the plants. The data collected and presented are the total number of aphids per 20 leaves. On 19 Jul a pre-count was taken and on 21 Jul all treatment applications were made. Data were analyzed using ANOVA and Student-Newman-Keuls multiple means comparison.

scholarly journals Foliar Sprays to Control Insects in Fall Peppers, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 136-137
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Plant Spacing ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Foliar Sprays ◽  
Marketable Fruit ◽  
Extension Center

Abstract Peppers were transplanted on 31 Jul at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25ft long rows with 3ft between row spacing and 1ft between plant spacing. Each plot was bordered on each side by an untreated guard row and replicated 4 times in a RCB design. Treatments were applied on the dates indicated in the table with a backpack sprayer using 3 hollow cone nozzles/row and delivering 60 gal water/acre at 40 psi. Evaluation criteria consisted of hand-harvest of marketable fruit on 10 healthy, uniform-sized plants/row (.00062 acre) and GPA counts on 5 randomly picked leaves/plot on 06 Oct. Harvesting was done in this manner due to uneven stands in some plots due to the drought.

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 Control of Lepidopterous Larvae on Spring Cabbage, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 95-95
Author(s):  
M. R. Peters ◽  
J. V. Edelson
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Larval Feeding ◽  
Feeding Damage ◽  
Hollow Cone ◽  
Extension Center ◽  
Direct Counts

Abstract Cabbage plants were transplanted on 6 Apr at the Wes Watkins Agricultural Research and Extension Center, Lane, OK. Each plot consisted of two 15 ft-long rows bordered on each side by an unplanted row. Cabbage was transplanted with 18-inch plant and 36-inch row spacing. Treatments were replicated 4 times in a RCB design. Sprays were applied with a back-pack sprayer using 2 TXVS-26 hollow cone nozzles/row and delivering 36 gal/acre at 40 psi. Applications were made on 10, 16, and 23 May and on 2 and 9 Jun. Evaluation criteria consisted of direct counts of all lepidopterous larvae on 5 randomly selected plants until 22 May and then 3 randomly chosen plants/treatment for the rest of the experiment. On 13 Jun damage ratings were determined. A head was considered marketable if no visible evidence of larval feeding damage was observed on the head or wrapper leaves.

scholarly journals Evaluation of Insecticides for Control of Aphids on Cotton in Mississippi, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 263-263
Author(s):  
Jack T. Reed ◽  
C. S. Jackson
Keyword(s):  
Science Research ◽  
Plant Science ◽  
Hollow Cone ◽  
Plot Size ◽  
True Leaf ◽  
Initial Ph ◽  
High Clearance

Abstract Insecticides were evaluated at the Plant Science Research Farm, Mississippi State, MS, in a RCB design with 4 replications. Plot size was 4 rows wide (38 inch spacing) by 50 ft long with 4 unsprayed buffer rows between plots. Insecticides were applied on 12 Jul with a high clearance spray tractor equipped with two Spraying Systems TX4 hollow cone nozzles spaced at 19 inches and calibrated for 5 gpa at a pressure of 40 psi and a speed of 3.5 mph. Carrier of the insecticides was water, with an initial pH of 8.0. Samples were taken from 10 leaves per plot at each of 3 levels on the plant: upper (4th true leaf), mid (mainstem leaf located a third down the plant), and lower (leaf on the bottom of the plant). Aphids were counted on one side of the leaf midvein (1/2 leaf) only.

scholarly journals Evaluation of Insecticides for Aphid Control (Trial 1), 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 265-265
Author(s):  
Jack T. Reed ◽  
Michael S. Howell ◽  
C. S. Jackson
Keyword(s):  
Growing Season ◽  
Hollow Cone ◽  
Aphid Control ◽  
High Clearance

Abstract This test was designed to evaluate the effectiveness of insecticides for control of cotton aphids in Mississippi. Plots were 4 rows wide and 50 ft long with four untreated rows or a 10 ft planted buffer between plots. Plants in each plot were sampled on a three to four day interval early in the growing season for cotton aphids by selecting ten random plants in each plot. One leaf from the terminal and one leaf four nodes below the terminal (mid level) were sampled on each plant. The total number of aphids on the top leaves and mid leaves was recorded. Treatment was initiated when population levels were rapidly increasing. Insecticide applications were applied on 23 Jun and 10 Jul with a high clearance spray tractor equipped with two TX4 hollow cone nozzles per row traveling 4 mph and delivering 5 gpa. Plots within a replicate were sprayed sequentially to maintain true replicate integrity. Yield was estimated by mechanically harvesting the center two rows of each plot.

scholarly journals Colorado Potato Beetle Control With Foliar Sprays, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 168-169
Author(s):  
Robert L. Stoltz ◽  
Nancy A. Matteson
Keyword(s):  
Colorado Potato Beetle ◽  
Individual Treatment ◽  
Row Spacing ◽  
Silt Loam ◽  
Hollow Cone ◽  
Weekly Basis ◽  
Potato Beetle ◽  
Whole Plant ◽  
Untreated Check ◽  
Extension Center

Abstract Experimental plots were established on the UI Research and Extension Center, Kimberly, Idaho. Potatoes were planted on 25 Apr and irrigated by solid set sprinkler. The soil type was Portneuf silt loam. Six treatments and one untreated check plot were replicated four times in a RCB design. Individual treatment plots were 4 rows (36 inch row spacing) wide by 25 ft long with 5 ft alleyways separating the plots. Treatment sprays were broadcast applied using a CO2 pressurized backpack sprayer (30 psi) and delivering 20 gal finished spray per acre (four, 10X hollow cone nozzles). On a weekly basis, egg masses, small larvae (1-2 instar), large larvae (3-4instar) and adult beetles were counted, and percent defoliation estimates were made from whole plant inspections of the center 5 hills of the middle 2 plot rows. On 5 Jul a pre-count of all Colorado potato beetle (CPB) life stages was taken and all treatment applications were made. A second application of both Spinosad rates was made on 12 Jul. Data were analyzed using ANOVA and Student-Newman-Keuls multiple means comparison.

scholarly journals Comparison of Viral, Bacteriological, and Standard Insecticides for Control of the Fruitworm Complex in Fall Tomatoes, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 189-190
Author(s):  
John Speese
Keyword(s):  
Disease Control ◽  
Agricultural Research ◽  
Row Spacing ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Extension Center

Abstract Tomatoes were transplanted into two fields on 27 Jul at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single 25ft row with 5ft between row spacing. Plots were replicated 3 times in a RCB design and separated from each other by untreated guard rows. The design in both fields was the same except for the number of treatments. Treatments were applied with a backpack sprayer using 3 hollow cone nozzles/row and delivering 45 gal waterlacre at 40 psi. Application dates for each field are indicated in the tables. Bravo 720 at 1.5pVacre was added to each treatment and the checks on 26 Sep and 02 Oct for disease control. On 9 Oct (Field I) and 16 Oct (Field 11). 25 green fruits were randomly picked from each plot and examined for worm damage.

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