Green Peach Aphid Control with Foliar Sprays, 1997

Robert L. Stoltz; Nancy A. Matteson

doi:10.1093/amt/23.1.134

Green Peach Aphid Control With Foliar Sprays, 1995

Arthropod Management Tests ◽

10.1093/amt/21.1.171 ◽

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.

Download Full-text

Colorado Potato Beetle and Green Peach Aphid Control with Soil Applied Insecticides and Foliar Sprays, 1996

Arthropod Management Tests ◽

10.1093/amt/22.1.162 ◽

1997 ◽

Vol 22 (1) ◽

pp. 162-163

Author(s):

Robert L. Stoltz ◽

Nancy A. Matteson

Keyword(s):

Seed Piece ◽

Foliar Application ◽

Green Peach Aphid ◽

Sweet Pepper ◽

Row Spacing ◽

Potato Beetle ◽

Whole Plant ◽

Aphid Control ◽

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. Eight treatments and one untreated check plot were replicated four times in a RCB design. Individual 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 on 27 Jun and again on 8 Jul. A total of four heavily infested plants were released per plot. On a weekly basis, adults, large larvae (3-4 instar), small larvae (1 -2 instar), and egg masses of CPB were counted and percent defoliation assessed from whole plant inspections of the center 5 hills of the middle 2 plot rows. GPA counts were made on 20 leaves chosen at random from the top, middle and bottom sections of plants in the center two rows of each plot. Admire treatments were applied at plant in-furrow over the seed piece on 25 Apr. Temik and Thimet were applied in-furrow with the seed piece also at planting. Furadan was applied in a six-inch banded S over the plants at 4-inch rosette stage of plant growth on 4 Jun using a CO2 pressurized backpack sprayer. All foliar treatments were broadcast on 29 Jun using the backpack CO2 sprayer at a rate of 20 gpa (30 psi, with 4, 10X hollow cone nozzles). On 11 Jul, a second foliar application of Metasystox-R + Asana, Monitor and Alert was made. Data were analyzed using ANOVA and Newman-Keuls multiple means comparison.

Download Full-text

Colorado Potato Beetle Control With Foliar Sprays, 1995

Arthropod Management Tests ◽

10.1093/amt/21.1.168 ◽

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.

Download Full-text

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

Arthropod Management Tests ◽

10.1093/amt/20.1.128 ◽

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.

Download Full-text

Azadirachtin (Align) to Control CPB on Potatoes, 1994

Arthropod Management Tests ◽

10.1093/amt/20.1.126 ◽

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.

Download Full-text

At Planting and Foliar Insecticides to Control Cucumber Beetles in Fall Cucumbers, 1994

Arthropod Management Tests ◽

10.1093/amt/20.1.92 ◽

1995 ◽

Vol 20 (1) ◽

pp. 92-92

Author(s):

John Speese

Keyword(s):

Agricultural Research ◽

Block Design ◽

Evaluation Criteria ◽

Foliar Spray ◽

Row Spacing ◽

Randomized Complete Block Design ◽

Cucumber Beetles ◽

Cucumber Beetle ◽

Marketable Fruit ◽

Extension Center

Abstract Cucumbers were planted on 12 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a 25 ft long row planted on 5 ft row spacing, replicated four times in a randomized, complete block design. An untreated guard row separated each plot. Furadan 4F was applied in furrow at planting using a single nozzle boom backpack sprayer. The Payload 15G in furrow at planting treatments were applied using a hand-held shaker. Foliar sprays were applied using a 3 hollow cone nozzle boom backpack sprayer delivering 45 gal water/acre at 40 psi. Foliar spray dates were 31 Aug and 6 and 13 Sep. On 31 Aug, the Furadan 4F at planting plots were less defoliated than the other plots and dead and dying cucumber beetles were observed. These plots were, therefore, not sprayed on this date. Dead and dying beetles were also observed in the Payload 15G plots on 31 Aug. These plots were treated with a low rate of Asana on this date, since actively feeding beetles were also observed. Evaluation criteria consisted of counts of both species of cucumber beetle on a randomly chosen 6 ft (30 sq ft) section of row in each plot and estimation of percent defoliation in each plot on the dates indicated in the table. The marketable fruit in each plot was harvested on 4, 11, and 20 Oct and the total yields for the season are indicated in the table.

Download Full-text

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

Arthropod Management Tests ◽

10.1093/amt/20.1.66 ◽

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.

Download Full-text

EFFECTS OF BELT SPEED, PRESSURE AND GRIT SIZE ON THE SANDING OF Pinus elliottii WOOD

CERNE ◽

10.1590/01047760201521011216 ◽

2015 ◽

Vol 21 (1) ◽

pp. 45-50 ◽

Cited By ~ 3

Author(s):

Manoel Cléber de Sampaio Alves ◽

Luiz Fernando Frezzatti Santiago ◽

Marcos Tadeu Tiburcio Gonçalves ◽

Ivaldo De Domênico Valarelli ◽

Francisco Mateus Faria de Almeida Varasquim

Keyword(s):

Surface Roughness ◽

Analysis Of Variance ◽

Block Design ◽

Pinus Elliottii ◽

Grit Size ◽

Significance Level ◽

Belt Speed ◽

Randomized Complete Block Design ◽

Four Levels ◽

Temperature Levels

The present paper aims to evaluate the influence of the factors (belt speed, pressure and grit size) on the output parameters (temperature and surface roughness) for Pinus elliottii wood sanding, processed parallel to the fibers. Three levels of belt speed, three levels of pressure and four levels of grit size were employed, with six replicates for each process, totaling 216 observations. The experiment conducted under a randomized complete block design (RCBD). The results were analyzed employing the analysis of variance (ANOVA) with 5% of significance level. Only grit sizes were significant to different temperature levels. The same outcome was observed for roughness, where only grits sizes were significant. No interaction between the pressure and belt speed factors were observed for all the results analyzed.

Download Full-text

The Effect of Season of Picloram and Chlorsulfuron Application on Dalmatian Toadflax (Linaria genistifolia) on Prescribed Burns

Weed Technology ◽

10.1614/wt-04-108r ◽

2005 ◽

Vol 19 (2) ◽

pp. 319-324 ◽

Cited By ~ 3

Author(s):

James S. Jacobs ◽

Roger L. Sheley

Keyword(s):

Prescribed Fire ◽

Prescribed Burning ◽

Block Design ◽

Prescribed Burn ◽

Prescribed Burns ◽

Randomized Complete Block Design ◽

Untreated Check ◽

Dalmatian Toadflax ◽

Density And Biomass ◽

Cover Density

Herbicides are an important tool for managing weeds where prescribed fire is used for rangeland improvement. Understanding how the season of herbicide application relates to prescribed burning is important. Our objective was to determine the effect of picloram and chlorsulfuron on Dalmatian toadflax cover, density, and biomass, where these herbicides were applied in the fall before burning or in the spring before or after burning. Six herbicide treatments and an untreated check were applied in a randomized complete block design with four replications to a prescribed burn at two sites infested with Dalmatian toadflax in Montana, United States. Herbicides were applied in the fall preburn, spring preburn, and spring postburn. Site 1 was treated in 1999 and 2000, and site 2 was treated in 2000 and 2001. Cover, biomass, and density of Dalmatian toadflax were sampled in September 2000, 2001, and 2002 at site 1 and September 2001 and 2002 at site 2. At site 1, cover, biomass, and density of Dalmatian toadflax were at least 76% lower compared with the check in both spring-applied picloram treatments, whereas the fall picloram treatment had similar Dalmatian toadflax cover, biomass, and density compared with the check 3 yr after application. By 2002, chlorsulfuron reduced Dalmatian toadflax cover, biomass, and density by at least 79% compared with the check in all timings of application at site 1. At site 2, Dalmatian toadflax cover, biomass, and density were reduced by at least 86% for all picloram and chlorsulfuron treatments in 2002, 2 yr after application. Chlorsulfuron applied in the fall or the spring and picloram applied in the spring effectively suppressed Dalmatian toadflax cover, biomass, and density for up to 3 yr.

Download Full-text

Length of Efficacy for Control of Curly Top in Sugar Beet With Seed and Foliar Insecticides

Plant Disease ◽

10.1094/pdis-02-16-0142-re ◽

2016 ◽

Vol 100 (7) ◽

pp. 1364-1370 ◽

Cited By ~ 2

Author(s):

Carl A. Strausbaugh ◽

Erik J. Wenninger ◽

Imad A. Eujayl

Keyword(s):

Sugar Beet ◽

Host Resistance ◽

Seed Treatment ◽

Field Experiments ◽

Block Design ◽

Root Yield ◽

Pyrethroid Insecticides ◽

Beet Curly Top Virus ◽

Randomized Complete Block Design ◽

Untreated Check

Curly top in sugar beet caused by Beet curly top virus (BCTV) is an important yield-limiting disease that can be reduced via neonicotinoid and pyrethroid insecticides. The length of efficacy of these insecticides is poorly understood; therefore, field experiments were conducted with the seed treatment Poncho Beta (clothianidin at 60 g a.i. + beta-cyfluthrin at 8 g a.i. per 100,000 seed) and foliar treatment Asana (esfenvalerate at 55.48 g a.i./ha). A series of four experiments at different locations in the same field were conducted in 2014 and repeated in a neighboring field in 2015, with four treatments (untreated check, Poncho Beta, Asana, and Poncho Beta + Asana) which were arranged in a randomized complete block design with eight replications. To evaluate efficacy, viruliferous (contain BCTV strains) beet leafhoppers were released 8, 9, 10, or 11weeks after planting for each experiment, which corresponded to 1, 2, 3, and 4 weeks after Asana application. Over both years, in 30 of 32 observation dates for treatments with Poncho Beta and 14 of 16 observation dates for Asana, visual curly top ratings decreased an average of 41 and 24%, respectively, with insecticide treatments compared with the untreated check. Over both years, in eight of eight experiments for treatments with Poncho Beta and six of eight experiments for Asana, root yields increased an average of 39 and 32%, respectively, with treatment compared with the untreated check. Over both years, the Poncho Beta treatments increased estimated recoverable sucrose (ERS) yield by 75% compared with the untreated check for weeks 8 and 9. By week 10, only the Poncho Beta + Asana treatment led to increases in ERS in both years, while the influence of increasing host resistance may have made other treatments more difficult to separate. When considering curly top symptoms, root yield, and ERS among all weeks and years, there was a tendency for the insecticides in the Poncho Beta + Asana treatment to complement each other to improve efficacy.

Download Full-text