scholarly journals Colorado Potato Beetle and European Corn Borer Control with Insecticides, Pasquotank Co., Nc, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 131-131
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
European Corn Borer ◽  
Block Design ◽  
Fourth Instar ◽  
Row Spacing ◽  
Hollow Cone ◽  
Corn Borer ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Hill Plots ◽  
Low Rate

Abstract ‘Atlantic’ potatoes were planted in early Mar for Tests 1 and 2 near Elizabeth City, N.C. on 42 inch centers. Plots in Test 1 were 14 ft long and in Test 2 20 ft long, with single row spacing replicated 4 times in a randomized complete block design. Alleys of 5 ft were used between replicates within rows. Treatments in Test 1 and Test 2 were applied with a CO2 pressurized backpack sprayer with a single hollow cone nozzle (18X) operated at 60 psi to deliver 54.5 gal/acre. In Test 1 all treatments were applied on 5, 11 and 18 May. All treatments were applied to Test 2 on 5 May, with the exception of the 1/6 lb rate of Trigard 75WP in combination with Trigard 75WP at 1/3 lb rate which received the combination low rate (1/6 lb) 6 days later. On 11 May applications were applied to all treatments except for Trigard 75WP at the 1/3 lb, 2/3 lb (egg only) and Trigard 75WP 1/3 lb (egg only) plus Trigard 75WP at the 1/6 lb rate. At this time the low rate of the combination Trigard 75WP 1/6 lb rate was applied. Imidan 50WP at 2 lbs and Imidan 50WP at 2 lbs plus Butacide 8EC at 0.5 lbs was applied on 5, 11 and 18 May. Test 1 and Test 2 counts of CPB on 3/hill plots were made 11 and 18 May. Small larvae were assumed to be first and second instar, and large larvae, third and fourth instar. Visual CPB damage ratings were made 18 May and 15 Jun. Visual ECB ratings were made and potatoes harvested and yields recorded 15 Jun.

scholarly journals Evaluation of Selected Bacillus Thuringiensis Insecticides for Control of Soybean Looper in North Louisiana, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 238-238 ◽  
Author(s):  
Rosanne N. Mascarenhas ◽  
Alan T. Wier ◽  
David J. Boethel ◽  
P. Scott Lingren ◽  
B. Rogers Leonard
Keyword(s):  
Block Design ◽  
Experimental Period ◽  
Compressed Air ◽  
Row Spacing ◽  
Research Station ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Period Data ◽  
Soybean Looper ◽  
North Louisiana

Abstract A field study was conducted at the Macon Ridge Branch, Northeast Research Station, located near Winnsboro (Franklin Parish), Louisiana, to evaluate the efficacy of several B. thuringiensis insecticides for soybean looper control. Test plots were 50 ft long by 5 rows with a 40 inch row spacing and were arranged in a randomized complete block design with four replications. Insecticides were applied with a tractor and compressed air sprayer calibrated to deliver 10 gpa at 38 psi through TX8 hollow cone nozzles (2 per row). Insecticide treatments were applied to soybeans in the R5 stage of growth (beginning seed) on 25 Aug. Posttreatment counts, consisting of 25 sweeps per plot, were taken with a 15 inch diameter muslin net at 2, 5, and 7 DAT. No rainfall occurred and the plots were not irrigated during the experimental period. Data were analyzed using analysis of variance followed by means separation according to DMRT.

scholarly journals Colorado Potato Beetle Control, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 110-110
Author(s):  
Casey W. Hoy ◽  
Michael J. Dunlap
Keyword(s):  
Seed Piece ◽  
Colorado Potato Beetle ◽  
First Generation ◽  
Block Design ◽  
Plant Spacing ◽  
Single Application ◽  
Hollow Cone ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Vine Killer

Abstract ‘Gemchip’ potatoes were planted 26 May at the Fry Farm, OARDC, Wooster, OH. Plant spacing was 36 inches between rows and 9 inches between plants. Three Admire 2F seed piece treatments were applied at planting using a CO2 compression sprayer at 40 psi with an 8004 flat fan nozzle delivering the insecticide into the seed furrow. The field was treated on 16 Jun with 0.75 lb/ acre of Sencor DF. Fungicide, Dithane at 2.0 lb/acre, was applied 9 Aug. Paraquat, 1 pt/acre, was applied 7 Sep as a vine killer. Plots were two rows wide and 40 ft in length, with 10 ft alleys separating plots and 6 ft alleys separating blocks. Treatments were arranged in a randomized complete block design. Foliar treatments were initiated when the first generation larvae were increasing in the plots in early Jul. Foliar applications were made 3 and 12 Jul and 3 and 12 Aug. The Trigard single application treatment was applied only on 3 Jul and 3 Aug. Foliar treatments were applied with a tractor mounted drop nozzle boom sprayer delivering 50 gal/acre at 50 psi with three D-4 hollow cone nozzles/row. Bond spreader sticker was added at 4 oz/ 100 gal solution to all rates of the following insecticides: Prokill Cryolite 96, AC303,630, M-Trak, and Novodor. Number of eggs, small larvae (instar 1-2), large larvae (instar 3-4), and adults were counted, and percent defoliation was visually estimated, in five 1-m lengths of row per plot approximately five days after each application.

scholarly journals Comparison of Cyromazine (Trigard) and Bacillus Thuringiensis (Novodor) Foliar Sprays for CPB Control on Potatoes, Painter, VA

1995 ◽  
Vol 20 (1) ◽  
pp. 128-128
Author(s):  
John Speese
Keyword(s):  
First Generation ◽  
Agricultural Research ◽  
Block Design ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Life Stages ◽  
Hollow Cone ◽  
Egg Hatch ◽  
Randomized Complete Block Design ◽  
Extension Center

Abstract Potatoes were planted on 8 April at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of six 30 ft long rows on 3 ft row spacing, replicated 4 times in a randomized, complete block design. Sprays were applied using either a tractor-mounted sprayer or a 3-hollow cone nozzle boom backpack sprayer if the ground was too wet for the tractor. Sprays were applied in 40 gal/acre water. Spray dates are indicated in the tables. The entire test was sprayed out on 20 Jun with Vydate L at 0.5 lb (AI)/acre and Furadan 4F at 1.0 lb (AI)/acre to control first generation CPB adults. Evaluation criteria consisted of weekly counts of all CPB life stages present on 10 randomly chosen plants/plot, and the first sprays were applied at peak CPB egg hatch. Percent defoliation for each plot was rated on 20 Jun, and the center two rows of each plot were harvested and graded on 1 Jul to determine yields.

scholarly journals Colorado Potato Beetle Control, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 113-113
Author(s):  
K. Kearns ◽  
E. Grafius ◽  
M. Bommarito ◽  
C. Brunt ◽  
J. Ferrigan ◽  
...  
Keyword(s):  
Colorado Potato Beetle ◽  
Block Design ◽  
Piperonyl Butoxide ◽  
Row Spacing ◽  
Potato Seed ◽  
Bare Ground ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Foliar Treatment

Abstract ‘Snowdon’ variety potatoes were used to test nineteen insecticides for control of Colorado potato beetle (CPB) at the MSU Montcalm Research Farm in Entrican, MI. Potatoes were planted 12 inches apart with a 34 inch row spacing on 4 May. Plots were 40 feet long by three rows wide and arranged in a randomized complete block design with four replications. Plots were separated by at least 5 feet of bare ground. Fosthiazate in-furrow treatments were incorporated into the soil through rototill on 3 May. An Admire treatment was applied in furrow on the potato seed with a CO2 backpack sprayer (8005 flat fan single nozzle, 30 psi) on 4 May. Foliar treatment applications were applied on 16, 23 Jun, 1 and 7 Jul using a tractor-mounted sprayer (30 gal/acre, 40 psi). Preplant Fosthiazate treated plots also received foliar treatments of Asana and piperonyl butoxide (PBO). Rain occurred on 24 Jun and 7 Jul within hours after spraying. Insecticide effectiveness was determined through postspray counts for all stages of CPB (small larvae = 1 st and 2nd instar, large larvae = 3rd and 4th instar) by searching two randomly selected plants from the middle row of each plot on 21, 28 Jun, 5 and 12 Jul. Plots were assessed for percent defoliation on 28 Jun, 5, 8 and 12 Jul. Plots were sprayed 13 Jul with Imidan and PBO (except for two of the Agrimek plots) to control summer adults emerging from poor treatments and migrating toward other research plots. All plots were sprayed for the same reason with Agrimek on 23 Jul and 11 Aug. Potatoes in the middle row of each plot were harvested on 2 Sept. Potatoes were separated by size.

scholarly journals Use of Neem-Based and Bacillus Thuringiensis Foliar Sprays to Control Colorado Potato Beetle on Potatoes, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 133-133
Author(s):  
John Speese
Keyword(s):  
Block Design ◽  
Potato Leafhopper ◽  
Plant Spacing ◽  
Eastern Shore ◽  
Agricultural Experiment Station ◽  
Hollow Cone ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Compressed Gas ◽  
Agricultural Experiment

Abstract Potatoes were planted on 15 Apr at the Eastern Shore Agricultural Experiment Station, Painter, VA. Each plot consisted of a 25 ft row bordered on each side by an untreated guard row, replicated 4 times in a randomized complete block design. Plant spacing was 10 inches between plants with 36 inches between rows. Sprays to control CPB were applied on the dates indicated in the table. On 15 and 22 Jun, the Novodor treatment was sprayed with Asana XL (0.04 lb AI) due to the presence of CPB large larvae and Fl adults. From 15 Jun on, Cygon 400 (0.25 lb AI) was added to the ATI 720 treatments to control potato leafhopper (Empoasca fabae). Sprays were applied with a propane compressed gas backpack sprayer using a 3 nozzle hollow cone (D4—5) boom and delivering 60 gal water/acre at 40 psi.

scholarly journals Azadirachtin (Align) to Control CPB on Potatoes, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 126-126
Author(s):  
John Speese
Keyword(s):  
First Generation ◽  
Agricultural Research ◽  
Block Design ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Life Stages ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Extension Center

Abstract Potatoes were planted on 11 April at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25 ft rows on 3 ft row spacing, replicated four times in a randomized, complete block design. An untreated guard row separated each plot. Admire 2F was applied in furrow preplanting using a single hollow cone nozzle boom backpack sprayer. Foliar sprays were applied on the dates indicated in the table using a 3 hollow cone nozzle boom backpack sprayer delivering 60 gal water/acre at 40 psi. On 21 and 23 Jun, the entire test was sprayed out with Vydate L at 0.50 lb(AI)/acre and Furadan 4F at 1.00 lb (AI)/acre to control first generation CPB adults. Evaluation criteria and spray decisions were based on weekly counts of all CPB life stages present on 10 random stems/plot. Sprays were applied if the following thresholds were exceeded: 4 small larvae, 1.5 large larvae, or 0.5 adults/stem. Percent defoliation for each plot was rated on 16 Jun and both rows of each plot were harvested and graded on 20 Jul to determine yields.

scholarly journals European Corn Borer Control with Microbial and Pyrethroid Insecticides on Pre-Tassel Sweet Corn, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 90-90
Author(s):  
W. D. Hutchison ◽  
D. W. Bartels ◽  
P. C. Bolin
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Block Design ◽  
Soil Surface ◽  
University Of Minnesota ◽  
Corn Borer ◽  
Pyrethroid Insecticides ◽  
Randomized Complete Block Design ◽  
The University ◽  
Neonate Larvae

Abstract This test was conducted on the University of Minnesota, Rosemount Experiment Station in corn planted 1 Jun. Plots consisted of single rows on 30" centers, 30 ft in length, and separated by untreated border rows and 4 ft alleys between replicates. Treatments were arranged in a randomized complete block design with 4 replications. All plots were infested 27 Jul with approximately 25 neonate larvae/plant; larvae were applied to the whorl using ‘bazooka’ applicators. Plant growth stage at the time of infestation was primarily VI2-V13 and 95% pre-tassel (i.e., green tassel visible within the whorl). A single application of each treatment was made 4 Aug; the majority of larvae were second-instars. A medium-clearance Spirit sprayer was used to apply all materials. Liquid formulations were applied with one TX-10 nozzle/row at 40 psi, for a final spray volume of 30 gal/acre. Granular formulations were applied using a Gandy applicator. For all materials, applicator ground speed averaged 2 mph, wind speed 2 mph and ambient temperature 59°F. All treatments were evaluated 23 Aug by dissecting 5 plants per plot, from the tassel to the soil surface.

scholarly journals Use of Labeled and Experimental Insecticides for Control of European Corn Borer and Corn Ear- ; Worm on Sweet Corn in Wisconsin, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 91-91
Author(s):  
John Wedberg ◽  
Bryan Jensen
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Block Design ◽  
Research Center ◽  
Corn Borer ◽  
Randomized Complete Block Design ◽  
High Clearance

Abstract ‘Jubilee’ sweet corn was planted at the Arlington Agriculture Research Center, Arlington, WI at 23,000 seeds per acre on 29 June. Each treatment was 6 rows wide and 60 feet long, arranged in a randomized complete block design, replicated four times. The first spray was applied 29 August when the crop started to pollinate. Subsequent sprays were applied 3, 9 and 16 September. All treatments were applied with a high clearance sprayer equipped with D2/23 TeeJet disc-core nozzles calibrated to deliver 10.7 gallons of finished spray per acre at 40 PSI when driven at 2.5 MPH. Plots were evaluated 26 September by removing 25 ears per treatment and recording number of damaged ears and the size of larvae present. “Early” CEW larvae were shorter than 1/2 inch, “Mid” larvae were longer than 1/2 inch but shorter than 3/4 inch and “Late” larvae were longer 3/4 inch. “Early” ECB larvae were shorter than 1/4 inch, “Mid” larvae are longer than 1/4 inch but shorter than 1/2 inch, and “Late” larvae were longer than 3/4 inch.

scholarly journals At Planting and Foliar Insecticides to Control Insects on Snap Beans, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 66-66
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Evaluation Criteria ◽  
Foliar Spray ◽  
Row Spacing ◽  
Hollow Cone ◽  
Foliar Sprays ◽  
Snap Beans ◽  
Randomized Complete Block Design ◽  
Extension Center

Abstract Snap beans were planted on 11 May at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25 ft rows planted on 3 ft row spacing and replicated four times in a randomized, complete block design. An untreated guard row separated each plot. Payload 15G treatments were applied pre planting in furrow using a hand-held shaker. Foliar sprays were applied with a 3 hollow cone nozzle boom backpack sprayer delivering 60 gal water/acre at 40 psi. Evaluation criteria consisted of counts of nymph and adult thrips on 10 trifoliate leaves/plot on the dates indicated in the table. The leaves were washed in soapy water, filtered through a Buchner funnel, and the thrips counted under a binocular dissecting microscope. A visual count of the number of PLH nymphs on 10 trifoliate leaves/plot was taken on 6 Jul. The first foliar sprays were applied on 8 Jun at prebloom and subsequent sprays were applied based on increasing thrips counts on the dates indicated in the table. When the Payload treatments required a foliar spray, they were treated with Orthene 75S at 0.50 lb (AI)/acre.

scholarly journals Colorado Potato Beetle Control, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 112-112
Author(s):  
Casey W. Hoy ◽  
Michael J. Dunlap
Keyword(s):  
Colorado Potato Beetle ◽  
First Generation ◽  
Block Design ◽  
Hollow Cone ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Vine Killer

Abstract ‘Gemchip’ potatoes were planted 12 May at the Fry Farm, OARDC, Wooster, OH. Plani spacing was 36 inches between rows and 9 inches between plants. Fertilizer was applied at planting (1750 lb/acre 10-20-20). The field was treated on 7 Jun with 0.75 lb/acre of Sencor DF. Fungicide, Dithane at 2.0 lb/acre, was applied at 12, 19, 26 Jul, 3, 18, 26 Aug, 2 Sep, and Penncozeb at 2.0 Vol acre was applied 10 Aug. Paraquat, 1 pt/acre, was applied 8 and 21 Sep as a vine killer. Plots were two rows wide and 50 ft in length, with 12 ft alleys separating plots and 6 ft alleys separating blocks. Treatments were arranged in a randomized complete block design. Foliar treatments were initiated when the first generation larvae were increasing in the plots and defoliation averaged between 21 and 25.25%. Foliar applications were applied 22 Jun, 1, 12, 19 Jul, and 10 Aug with a tractor mounted drop nozzle boom sprayer delivering 50 gal/acre at 50 psi with three D-4 hollow cone nozzles/row. Number of eggs, small (instar 1-2), large (instar 3-4) larvae, and adults were counted and percent defoliation was visually estimated in five 1-m lengths of row per plot weekly. Leafhopper nymphs and aphids were sampled by visually inspecting 5 compound leaves per plot on and after 6 Jul.

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