scholarly journals Evaluation of Insecticides Against Scarab Grub Complex on Blueberries, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 60-61
Author(s):  
S. Polavarapu
Keyword(s):  
Species Composition ◽  
Soil Type ◽  
Treatment Effects ◽  
Sandy Loam ◽  
Block Design ◽  
Randomized Complete Block Design ◽  
Before And After ◽  
Full Production ◽  
Spray Field

Abstract This trial was conducted in a 5-year-old ‘Duke’ blueberry field in full production, near Hammonton, NJ. Blueberry bushes were approximately 4-5 ft tall and spaced 9 X 4 ft apart and were irrigated season long with overhead sprinklers. Soil type at this location was sandy loam with a pH of 4.0. Treatments were replicated 5 times in a randomized complete block design with each replicate consisting of 40-ft long row of 10 bushes. Treatments were separated by 18-ft between blocks and 20-ft between treatments within a block. Insecticides were applied as a 2-ft band on both sides of the plant for a total of 160 ft2 per replicate. Treatments were applied on 13 Aug with a CO2 pressurized Model T backpack sprayer (R & D sprayers) equipped with a single TeeJet nozzle (8002VS). The sprayer was operated at 40 PSI and calibrated to deliver 150 gpa of finished spray. Field was irrigated with approximately 0.5 and 1.0 inches of water before and after spraying, respectively. Treatment effects were assessed by examining soil and roots in 12-inches-diam. by 16-inches deep areas around each of 4 randomly selected plants per replication for scarab grubs. Plants were sampled between 20-25 September. At the time of sampling, species composition of grubs (n = 2,015) was 92.8% OB, 6.7% AGB and 0.5% M-JB.

scholarly journals Evaluation of Admire 2F and an Entomopathogenic Nematode to Manage Oriental Beetle Popula-Tions on Blueberries, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 51-51 ◽  
Author(s):  
S. Polavarapu ◽  
H. Peng ◽  
R. J. Stuart
Keyword(s):  
Soil Type ◽  
Sandy Loam ◽  
Entomopathogenic Nematode ◽  
Application Time ◽  
Single Row ◽  
Popula Tions ◽  
Before And After ◽  
Full Production ◽  
Oriental Beetle ◽  
Spray Field

Abstract The effect of application time of Admire 2F (imidacloprid) and an entomopathogenic nematode, Heterorhabditis bacteriophora (CruiserTM), on their efficacy against scarab grubs was assessed in blueberries. This trial was conducted in a 6-year-old ‘Elliott’ blueberry field in full production, near Hammonton, NJ. Blueberry bushes were approximately 4-5 ft tall and spaced 9 X 4 ft apart and were irrigated season long with overhead sprinklers. Soil type at this location was sandy loam with a pH of 4.0. Treatments were replicated 4 times in a RCB design with each replicate consisting of 36-ft long row of 8-9 bushes. Treatments were separated by a single row between blocks and 15-ft between treatments within a block. Three application timings of Admire (11 June, 8 July, 14 August) and two timings of Cruiser (8 July and 14 August) were evaluated. These dates approximately represent the beginning, peak, and completion of adult flight of OB in New Jersey. Insecticides were applied as a 1.5-ft band on both sides of the plant for a total of 108 ft2 per replicate. Insectides were applied with a CO2 pressurized Model T backpack sprayer (R & D sprayers) equipped with a single TeeJet nozzle (1105 VS) operated at 40 PSI and calibrated to deliver 100 gal/acre of finished spray. Field was irrigated for approximately 2 and 4 hours before and after spraying, respectively. Treatment effects were assessed by sampling soil and roots in 12-inches-diameter by 10-inches-deep areas around each of 4 randomly selected plants per replication for OB grubs. Plants were sampled between 23 September-3 October. Data were transformed to x + 0.5 before analysis of variance.

scholarly journals Potato Insect Control, 1992

1994 ◽  
Vol 19 (1) ◽  
pp. 127-127
Author(s):  
A. C. Slocombe ◽  
D. N. Ferro
Keyword(s):  
Soil Type ◽  
Second Generation ◽  
Sandy Loam ◽  
Block Design ◽  
Insect Control ◽  
Egg Hatch ◽  
Egg Masses ◽  
Fine Sandy Loam ◽  
Randomized Complete Block Design ◽  
Potato Insect

Abstract Potatoes were planted on 1 May in South Deerfield, Massachusetts. Fertilizer (600 lbs 10N:10P:10K/ acre) was banded into the furrow at planting. Soil type was a fine sandy loam with a pH of 5.6. Manzate (fungicide) was applied at 1 lb. Al/acre on 1 Jul. CPB densities on 4 Jun were 1.2 adults, 50 eggs, 0.3 early instars per plant, and CPB densities on 15 Jun were 3.3 adults, 167 eggs, 6 early instars and 1.7 late instars per plant. Treatments were replicated 4 times in a randomized complete block design. Each plot consisted of two 30 ft. rows with a 6 ft. fallow area between plots. Treatments were applied with CO2-pressurized sprayers at 40 psi, delivering 70 gal/acre. Novodor and Foil OF were applied on 5 (first hatch), 15 (30% hatch) and 22 (50% hatch and 4th instar observed) Jun. All other applications were made on 15, 22, and 29 Jun. For second generation larvae, percentage egg hatch was based on flagging 10 egg masses at the beginning of the ovipositional period, using the percentage hatch based on these eggs. For second generation, Novodor and Foil OF were applied on 6 (first hatch), 8 (30% hatch) and 10 (50% hatch) Jul. All other treatments were applied on 13 (observed 3rd instars) and 24 Jul.

scholarly journals Potato Insect Control, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 120-121
Author(s):  
Andrew C. Slocombe ◽  
David N. Ferro
Keyword(s):  
Soil Type ◽  
Sandy Loam ◽  
Block Design ◽  
Insect Control ◽  
Population Densities ◽  
Fine Sandy Loam ◽  
Randomized Complete Block Design ◽  
Separate Treatment ◽  
Potato Insect

Abstract Potatoes were planted on 30 Apr in South Deerfield, Massachusetts. Fertilizer (600 lbs 1 ON: 10P:1 OK/acre) was banded into the furrow at planting, and an additional 200 lbs was applied at hilling on 30 Jun. Soil type was a fine sandy loam with a pH of 5.6. Manzate (fungicide) was applied at 1 lb. Al/acre on 30 Jun and 25 Jul. Treatments were replicated 4 times in a randomized complete block design. Each plot consisted of two 30 ft. rows with a 6 ft. fallow area separating each plot. Treatments were applied with CO2-pressurized sprayers at 40 psi, delivering about 70 gal/acre. CPB population densities were determined by counting larvae on 5 plants or whole stalks in each plot. The number of early instars (first and second) or late instars (third and fourth) were recorded. Admire was applied in the furrow at planting (136 g AI/A), and in a separate treatment it was applied to the base of the plants on 8 Jun (91 g AI/A). All foliar treatments were first applied on 15 Jun, and the 7 day treatments were applied again on 22, 29 Jun, 6, 13, 20 and 27 Jul. The 14 day treatments were applied on 15, 29 Jun, 13 and 27 Jul.

scholarly journals Potato Insect Control, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 122-122
Author(s):  
Andrew C. Slocombe ◽  
David N. Ferro
Keyword(s):  
Soil Type ◽  
Sandy Loam ◽  
Block Design ◽  
Insect Control ◽  
Single Application ◽  
Population Densities ◽  
Fine Sandy Loam ◽  
Randomized Complete Block Design ◽  
Potato Insect ◽  
Whole Plants

Abstract Potatoes were planted on 30 Apr in South Deerfield, Massachusetts. Fertilizer (600 lbs 10N:10P:10K/acre) was banded into the furrow at planting, and an additional 200 lbs was applied at hilling on 30 Jun. Soil type was a fine sandy loam with a pH of 5.6. Manzate (fungicide) was applied at 1 lb. Al/acre on 30 Jun and 25 Jul. Treatments were replicated 4 times in a randomized complete block design. Each plot consisted of two 30 ft. rows with a 6 ft. fallow area separating each plot. All samples were taken from the center two rows. Treatments were applied with CO2-pressurized sprayers at 40 psi, delivering about 70 gal/acre. CPB population densities were determined by counting larvae on 5 whole plants or stalks in each plot. The number of early instars (first and second) or late instars (third and fourth) were recorded. Admire was applied to the base of plants on 8 Jun; plants were about 8” tall. The foliar treatments were first applied on 15 Jun, and then again on 22, 29 Jun, 6, 13, 20 and 27 Jul. The first two abamectin treatments were treated with Novodor at 2.5 qt/acre on 15 and 22 Jun followed by a single application of abamectin on 29 Jun, while the last two abamectin treatments were treated with Novodor at 2.5 qt/acre weekly from 15 Jun through 13 Jul and then on 20 Jul received a single application of abamectin. Fipronil treatments were applied on 15, 29 Jun, 13 and 27 Jul.

scholarly journals Potato Insect Control, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 128-128
Author(s):  
A. C. Slocombe ◽  
D. N. Ferro
Keyword(s):  
Soil Type ◽  
Sandy Loam ◽  
Block Design ◽  
Insect Control ◽  
Population Densities ◽  
Egg Masses ◽  
Fine Sandy Loam ◽  
Randomized Complete Block Design ◽  
Potato Insect

Abstract Potatoes were planted on 5 May in South Deerfield, Massachusetts. Fertilizer (600 lbs 10N:10P:10K/ acre) was banded into the furrow at planting. Soil type was a fine sandy loam with a pH of 5.6. Manzate (fungicide) was applied at 1 lb Al/acre on 24 Jun and 6 Jul. CPB densities on 15 Jun were 1.4 adults, 3.3 egg masses and 2.9 early instars per plant. Treatments were replicated 4 times in a randomized complete block design. Each plot consisted of two 30 ft. rows with a 6 ft. fallow area separating each plot. All samples were taken from the center plants in each plot. Treatments were applied with CO2-pressurized sprayers at 40 psi, delivering about 70 gal/acre. CPB population densities were determined by counting larvae on 5 whole stalks in each plot. The number of early instars (first and second) or late instars (third and fourth) were recorded. All treatments were first applied on 16 Jun, and again on 23 and 30 Jun, and 7 and 14 Jul.

Effect of Bio and Organic Fertilizers on Pumpkin's (Cucurbita pepo L.) Leave Content of N, P, and K

2020 ◽  
Vol 10 (1) ◽  
pp. 241-245
Author(s):  
Ammar Hameed Madi ◽  
Jawad A. Kamal Al-Shibani
Keyword(s):  
Cucurbita Pepo ◽  
Sandy Loam ◽  
Block Design ◽  
Organic Fertilizers ◽  
Flowering Stage ◽  
College Of Agriculture ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Loam Soil ◽  
Four Levels

This study was conducted to investigate the effect of bacterial bio-fertilization A. chroococcum and P. putide and four levels of compost (0, 1, 2, 3) tons.h-1 on the leaves content of N.P.K elements. The experiment was carried out in one of the greenhouses of the College of Agriculture - University of Al-Qadisiyah during fall season 2018-2019. It designed in accordance with the Randomized Complete Block Design (RCBD) with three replicates in sandy loam soil. The means of treatments were compared with the least significant difference (LSD) at (5)% probability level. The results present that the treatments of A. chroococcum, P. putide and compost at (3) tons.kg-1 significantly increases the leaves content of K.P.K compared to all other treatments in the flowering stage (4.970, 0.5000, and 4.930) mg.kg-1, respectively. This treatment was followed by the effect of the treatment of A. chroococcum and compost at (3) tons.kg-1, which increases the values of all traits except the leaf content of (P). Bio-fertilizer with P. putide + A. chroococcum significantly increases the leaves' content of P.

scholarly journals Physical Bean Quality of Arabica Coffee (Coffea Arabica) Cultivated at High and Medium Altitude

2016 ◽  
Vol 32 (3) ◽  
pp. 151-161
Author(s):  
Dwi Nugroho ◽  
Panjisakti Basunanda ◽  
Suryadi Mw
Keyword(s):  
Coffea Arabica ◽  
Block Design ◽  
Research Station ◽  
Physical Quality ◽  
Arabica Coffee ◽  
Randomized Complete Block Design ◽  
Before And After ◽  
Coffee Cultivation ◽  
Cup Quality

Reducing productivity, outbreak of insects and diseases, and decreasingin physical and cup quality are major problems for Arabica coffee cultivation inmedium altitude. The aim of this study was to investigate the effect of altitude onphysical quality in eight genotypes of Arabica coffee. This research was conductedat two locations i.e. Andungsari Research Station-Bondowoso (1250 m asl. ashigh altitude) and Kalibendo Estate-Banyuwangi (700 m asl. as medium altitude).Randomized complete block design was used with three replications. Collecteddata consisted of outturn, weight of 100 beans, shape bean normality, apparentswelling, bulk density before and after roasting. Combined analysis on the physicalquality traits of green bean showed genotype x altitude interactions on weight of100 beans, percentage of normal beans and percentage of empty bean. Altitudesignificantly influenced coffee outturn. Decreasing in altitude from 1.250 m asl.to 700 m asl. caused declining in the outturn as much 32.9%. BP 700A, K 29, K34, K 79, and K 99 were genotypes that stable to produce normal bean and emptybeans at high and medium altidute, while K 8, K 130, and SIG were genotypeswith high normal beans at high altitude but not stable. Genotype x altitude interactiondid not occur for physical quality of other variables of outturn, bulk densitybefore and after roasting, apparent swelling, percentage of round beans,percentage of elephant beans, and percentage of triage beans. Altitude showedsignificant effect on all of physical quality of bean variables.

scholarly journals Foliar Sprays to Control Ear Invading Insects in Sweet Corn, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 87-87
Author(s):  
James J. Linduska ◽  
Marylee Ross ◽  
Karen Mulford ◽  
John Nottingham
Keyword(s):  
Soil Type ◽  
Sweet Corn ◽  
Block Design ◽  
Loamy Sand ◽  
Fresh Market ◽  
Foliar Sprays ◽  
Randomized Complete Block Design

Abstract ‘NK-199’ sweet corn was planted in 4-row plots 100 ft in length on 1 Jun ‘94. Distance between rows was 3 ft. Distance between plants within the row was 8 inches with the center 2 rows serving as record rows. Plots were replicated 4 times in a randomized complete block design. Sprays were applied with an International Harvester 770 Hi-Clear sprayer. The spray boom was adjusted to spray the silk area with each row being covered by 4 nozzles. The sprayer was equipped to treat 4 rows. All treatments were mixed in 10 gallons of water and applied at the rate of 25 gal/acre with 50 psi. Spray treatments were applied at 30% silk on 20 Jul, 24 Jul and 1 Aug. At harvest (4 Aug), 30 ears from the center 2 rows of each plot were husked and evaluated for worm damage as fresh-market (clean ears, no damage evident), processing (evidence of tip feeding but less than 3.6 cm tip damage), and culls (tip damage beyond 3.6 cm to the side and/or bottom). All worms found within the husk or ear were identified. The soil type was Norfolk “A” loamy sand.

scholarly journals Impact of Forage Fertilization with Urea and Composted Cattle Manure on Soil Fertility in Sandy Soils of South-Central Vietnam

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Keenan C. McRoberts ◽  
Quirine M. Ketterings ◽  
David Parsons ◽  
Tran Thanh Hai ◽  
Nguyen Hai Quan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Fertility ◽  
Block Design ◽  
Cattle Manure ◽  
Nutrient Balances ◽  
South Central ◽  
Central Vietnam ◽  
Randomized Complete Block Design ◽  
Before And After ◽  
Forage Management

Increased production in smallholder beef systems requires improved forage management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established toBrachiariacv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattle manure (0, 4, 8, 12, and 24 Mg DM/ha per yr) and three urea rates (0, 60, and 120 kg N/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.

scholarly journals Phytotoxicity of herbicides on Cynodon dactylon

2015 ◽  
Vol 7 (2) ◽  
pp. 832-835
Author(s):  
Siddappa Siddappa ◽  
B. L. Geeta ◽  
Raj Likhitha ◽  
K. V. Jayaprasad ◽  
Revannappa R. Bandri
Keyword(s):  
Cynodon Dactylon ◽  
Sandy Loam ◽  
Block Design ◽  
Experimental Plot ◽  
Randomized Complete Block Design ◽  
Broad Leaf ◽  
Dimethyl Amine ◽  
Phytotoxic Effect ◽  
Loam Soil ◽  
Hand Weeding

Field experiment was conducted to manage the sedge and broad leaf weeds in lawn during November to December 2013 to February to March 2014. Experimental plot was red sandy loam soil with pH 6.50.The experimental plot consisted of bermuda grass Cynodon dactylon which was established through turfing. The experimental plot was laid out in a randomized complete block design (RCBD) having 17 treatments with three replications. Herbicide treatments include 2, 4-D sodium salt 80 WP at (2, 3 and 4g/lit of water), 2, 4-D dimethyl amine salt 58% EC at (5, 7.5 and 10 ml/lit of water), carfentrozone ethyl 40 DF at (0.25, 0.5 and 1 g/lit of water), fluroxypyr meptyl 48% EC at (1.5, 3 and 6 ml/lit of water) and chlorimuron methyl + metasulfuron methyl at (0.3, 0.4 and 0.5 g/lit of water). Hand weeding was done at every 20 days interval at 20 days after application of herbicides and also maintained one unweeded control in during November to December and February to March. The phytotoxic symptoms were observed only fluroxypyr meptyl 48% EC applied at 6 ml/lit of water at 3, 7, 10, 15 and 25 days after application of herbicides (DAAH) but it recovered at later stages. However, the other herbicides did not cause any phytotoxic effect on C. dactylon.

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