scholarly journals Laboratory Evaluation of Insecticides for Control of Tarnished Plant Bug in Mississippi, II, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 406-408
Author(s):  
Jack T. Reed ◽  
C. S. Jackson
Keyword(s):  
Block Design ◽  
Laboratory Evaluation ◽  
Mississippi State University ◽  
State University ◽  
Hollow Cone ◽  
Tarnished Plant Bug ◽  
Randomized Complete Block Design ◽  
Initial Ph ◽  
Filter Papers ◽  
Leaf Disks

Abstract Insecticides were evaluated at Mississippi State University in a randomized complete block design with 4 replications. Insecticides were applied on 31 May in a spray chamber equipped with a single Spraying Systems TX3 hollow cone nozzle and calibrated for 5 gpa at a pressure of 28 psi and a speed of 3 mph. Carrier of the insecticides was water, with an initial pH of 8.0. Plant bugs were collected the morning of application by sweeping wild flowers with a 15 inch diameter sweep net. Leaves were collected in the field and transported to the lab where leaf disks 48 mm in diameter were cut and placed in 50 x 11 mm Petri dishes with two filter papers moistened with four drops of water to keep the leaf turgid. The leaf disks were then sprayed and allowed to dry before being infested. Four leaf disks with five plant bugs each were used per treatment and replicate. The bioassay was maintained in darkness at 80° F for 24 h prior to evaluation.

scholarly journals Nitrogen Application in Arugula Culture

2019 ◽  
Vol 11 (2) ◽  
pp. 385
Author(s):  
Katiane Santiago Silva Benett ◽  
Ricardo Caldas Xavier ◽  
Cleiton Gredson Sabin Benett ◽  
Leandro Caixeta Salomão ◽  
Alexsander Seleguini ◽  
...  
Keyword(s):  
Vegetative Growth ◽  
Block Design ◽  
Nitrogen Sources ◽  
State University ◽  
Nitrogen Application ◽  
Leaf Quality ◽  
Randomized Complete Block Design ◽  
Coated Urea ◽  
Nutrient Amounts ◽  
Culture Development

Vegetable development and productivity are influenced by several factors, including the nutrient amounts available. Providing adequate nitrogen favours vegetative growth and promotes increased productivity, in addition to providing greater succulence and improving leaf quality. This work evaluated the effect of nitrogen doses and sources on arugula culture development and productivity. The experiment was conducted on the experimental farm at the State University of Goiás, Ipameri campus, in the municipality of Ipameri, Goiás state (GO). The experiment used a 2 × 5 factorial randomized complete block design, with two sources (normal urea and coated urea), five nitrogen doses (0, 60, 120, 180 and 240 kg ha-1 of N) and four replicates. Plant height, stem diameter, leaf number, fresh shoot matter, dry shoot matter and productivity were evaluated. The results obtained here suggest that nitrogen sources do not influence arugula culture development, but nitrogen doses influence the arugula culture’s productive characteristics.

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 Control of Imported Cabbageworm on Late Season Cabbage, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 67-67
Author(s):  
Donald J. Prostak
Keyword(s):  
Cultural Practices ◽  
Block Design ◽  
Hollow Cone ◽  
Late Season ◽  
Randomized Complete Block Design

Abstract Cabbage was transplanted on 9 Aug at the Snyder Research and Extension Farm, Pittstown, NJ. Treatment plots were replicated 4 times in a randomized complete block design and consisted of single rows, 30 ft long on 5 ft centers with 3 ft between plants. Buffers were 5 ft between rows and 12 ft between plots within rows. Standard cultural practices were used throughout the trial. Treatments were applied on 15, 18 Sep, and 1 Oct with a COz-pressurized single hollow-cone nozzle, hand-held sprayer that delivered 73.5 gal/acre directed at the upper surface of all leaves. Activator 90, a spreader-sticker, was added at the rate of 1 pt/100 gal to all treatments. Plots were evaluated on 28 Sep and 5 Oct by examining 5 plants from the middle of each replicate. All ICW larvae on the leaves were identified and counted.

scholarly journals An Assessment of Genetic Variability in Contrasting Castor Seedlings

2020 ◽  
Vol 2 (6) ◽  
Author(s):  
G. I. Ilo ◽  
I. A. Nweke ◽  
S. I. Ijearu
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Flowering Plant ◽  
State University ◽  
Randomized Complete Block Design ◽  
Region Length ◽  
Number Of Leaves ◽  
Enugu State ◽  
Cropping Seasons ◽  
Better Than

Nine genotypes of castor oil bean (Ricinus cumunis) were evaluated in 2011 and 2012 cropping seasons to determine their consistency of performance at the Enugu State University of Science and Technology, Enugu State. Eight (8) accessions were selected from various locations in the south east, while a standard check was obtained from Ahmadu Bello University Zaria. The study was carried out using a randomized complete block design with four replications. Data was collected on number of days to germination, days to 50% flowering, plant height at maturity, length of primary raceme, length of pistillate region, length of staminate region and number of leaves. The findings from the study showed that Zaria accession flowers within 80 days and significantly (P < 0.05) different from the other eight (8) accessions studied, except Udi for plant height at maturity the significant and comparable large genotypes for all the characters except number of days to germination; number of nodes and length of staminate region implies that there would be adequate gains in selecting the characters. The phenotypic coefficient of variation was found to be higher than the genotypic coefficient of variance for all the character studied indicating the influence of environment towards the total variance. The short height recorded in Zaria and Udi accessions which are at par is of a desirable trait for shorter plants are easier to manage agronomical and it also withstands lodging better than all plants. These accessions based on the agronomic characters studied were found to perform very well in Enugu south-east, Nigeria and is therefore, recommended to be grown in this region.

scholarly journals Competative Behaviour of Groundnut in Sesame-Groundnut Intercropping System under Varying Poultry Manure Rates and Planting Arrangement

2013 ◽  
Vol 2 (3) ◽  
pp. 22
Author(s):  
Haruna I. M. ◽  
Aliyu L. ◽  
Maunde S. M.
Keyword(s):  
Field Experiment ◽  
Competitive Ratio ◽  
Block Design ◽  
Poultry Manure ◽  
State University ◽  
Land Equivalent Ratio ◽  
Equivalent Ratio ◽  
Randomized Complete Block Design ◽  
Competitive Behaviour ◽  
Competition Indices

<p>Field experiment was conducted during the rainy seasons of 2011 and 2012 at the Teaching and Research Farm of the Faculty of Agriculture, Nasarawa State University, Keffi-Lafia Campus to study the competitive behaviour of groundnut in Sesame-groundnut intercropping system. The experiment consisted of four rates of poultry manure (0, 3.0, 6.0 and 9 t ha<sup>-1</sup>) and two planting arrangement (single alternate row and double alternate row planting arrangement). The eight treatment combinations were laid out in a randomized complete block design with four replications. The results obtained in both the years showed that sesame when grown with groundnut under different rates of poultry manure and planting arrangement appeared to be a dominant crop as indicated by its higher values of Land equivalent ratio, competitive ratio, higher and positive values for aggressivity and area time equivalent ratio. Application of 6 t ha<sup>-1</sup> of poultry manure and double alternate row planting arrangement produced the highest values for all the competition indices measured respectively.</p>

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 Época e intensidade de poda no desenvolvimento e produção de amoreira-preta cv. Xavante cultivada em sistema orgânico

2015 ◽  
Vol 6 (3) ◽  
pp. 326
Author(s):  
Thiago Marchi ◽  
Doglas Broetto ◽  
Alessandro Jefferson Sato ◽  
Aline José Maia ◽  
Renato Vasconcelos Botelho ◽  
...  
Keyword(s):  
Block Design ◽  
Great Influence ◽  
Fruit Weight ◽  
Organic Production ◽  
Soluble Solids ◽  
State University ◽  
Good Strategy ◽  
Randomized Complete Block Design ◽  
Early Harvest ◽  
Time Of Harvest

The practice of winter pruning, held in temperate fruit, has great influence on the development and production of these crops. Changes in pruning system may result in significant changes in the time of harvest, yield and fruit quality.This study aimed to evaluate the effects of time and intensity of pruning in the development and production of blackberry cv. Xavante in organic production system. The experiment was conducted during the crop year 2009/2010 and 2010/2011 in the experimental orchard of the State University of Centro-Oeste (Unicentro)Guarapuava - PR. The experimental design was a randomized complete block design with five replications in a 2x2 factorial design, with two pruning times: early and late, and two intensities of pruning side branches: short and long, a total of four treatments. The variables analyzed were: budding percentage (%), percentage of flowering (%), average fruit weight (g), number of fruits, total soluble solids (°brix), yield (kg), estimated yield (kg ha-1) and early yield (kg plant-1 and %). The time and intensity of pruning did not influence the average fruit weight and soluble solids. Early pruning can be a good strategy to obtain higher yields in early harvest. Early and long pruning is recommended in the most productive terms.

scholarly journals EFFECT OF COW DUNGS RATE AND SASAKAWA TECHNOLOGY ON THE PERFORMANCE OF MAIZE (ZEA MAYS) IN MUBI GUINEA SAVANNAH OF NIGERIA

2020 ◽  
Vol 8 (4) ◽  
pp. 230-242
Author(s):  
Dahiru Toungos
Keyword(s):  
Crop Production ◽  
Block Design ◽  
Grain Weight ◽  
Cow Dung ◽  
State University ◽  
Positive Correlation ◽  
Cropping Season ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Number Of Leaves

This experiment was carried out during 2019 cropping season to evaluate the effect of cow dung rates and Sasakawa technology on the performance of maize in Mubi, Northern Guinea Savannah at Food and Agricultural Organization Tree/Crop production farm Adamawa State University, Mubi. The trial was laid out in Randomized Complete Block Design replicated three times. Data was collected on fifteen characters namely: Number of leaves at 3,6 and 9 weeks after sowing also Plant height at 3,6 and 9 weeks after sowing, Cob length, Number of row per cob, Number of seed per row, Cob diameter, Cob yield, Shelling percentage, Grain weight, Grain yield and 100 Grain weight. Results showed a non-significant difference for all the fifteen (15) traits of maize T1 but T4 have better performance. Also, NL3 and NL6, T3, T4 and T5 outperformed in terms of yield, NL3 showed a highly significant positive correlation with NL6, NL9, PH3 and PH6. Cob yield also has slightly and significantly correlation with NL6, CL and NS/R. The treatments respond to variations in the rates of cow dung application during the trial period. As highly significant and positive correlation was observed for NL3, NL6, NL9, PH3, PH6, and PH9 indicating differences in the treatments applied. The experiment revealed that treatment T1, T4 and T1, T4 for NL3, and NL6 gave highest performance than other treatments, followed by T1 and T4 for NL9 which also did well in that order respectively. Cob yield was observed to performed better in T3, T4 and T5. That translates to a very good grain yields in T3 (27kg/ha-1), T4 (16.20kg/ha-1) and T5 (20kg/ha-1). This might be due to the rates of cow dung applied on these treatments. Hence, it is therefore recommended based on the results of the study to use these range of cow dung in the study area.  Further research is also recommended to be done in this area for adoption by farmers.

scholarly journals Control of Lepidopterous Larvae in Sweet Corn, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 85-85
Author(s):  
R. E. Foster ◽  
W. G. Buhler
Keyword(s):  
Sweet Corn ◽  
Block Design ◽  
Insect Damage ◽  
Feeding Damage ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Over The Top ◽  
High Clearance

Abstract This test was conducted at the O’Neall Memorial Farm, Lafayette, Indiana. The sweet corn variety ‘Bodacious’ was planted 1 Jul in 30 inch rows. Each plot consisted of four rows by 50 feet long, arranged in a randomized complete block design with four replications. Insecticides were applied on 15, 22, 26, and 29 Aug. Treatments on the first two dates coincided with the occurrence of row tassel and the beginning of silk, respectively. Insecticides were applied with a high clearance sprayer operating at 40 psi and delivering 12 gal/acre of finished spray. There were three hollow cone nozzles per row, with one nozzle over the top of the row and one nozzle on each side of the row directed toward the ear zone. Evaluations were made at harvest on 12 Sep by examining twenty-five ears from each plot for the presence of larvae and feeding damage. Each ear was rated as clean (no insect damage), marketable (damage limited to terminal one inch of the ear), or unmarketable (damage extended beyond the terminal inch of the ear).

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