scholarly journals Control of Cypermethrin Treatment-History Thrips in Onions, FT. Morgan, Co, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 98-98
Author(s):  
Whitney S. Cranshaw
Keyword(s):  
Block Design ◽  
Compressed Air ◽  
Treatment History ◽  
Whole Plant ◽  
Randomized Complete Block Design

Abstract Plots were established 10 Jun at a production field of transplanted onions south of Ft. Morgan, CO. The field had previously been treated with cypermethrin (Ammo 2.5E), but thrips populations remained in excess of 30/plant one week after applications. Plots consisted of single two-row beds, 50-ft in length arranged in a randomized complete block design with four replications. Treatments were applied with a hand-operated compressed air sprayer delivering 50 gal/acre. Evaluations were made 14 Jun, using whole plant counts on six consecutive plants in the center of each plot.

scholarly journals Onion Thrips Control, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 140-140
Author(s):  
Whitney Cranshaw ◽  
Janson Bishop
Keyword(s):  
Block Design ◽  
Compressed Air ◽  
Onion Thrips ◽  
Randomized Complete Block Design ◽  
Neck Area

Abstract Trials conducted in Fruita, CO, using seeded onions (cv. Brown Beauty) in single rows at 30-in spacing Plots were 20-ft in length arranged in a randomized complete block design with 4 replications. Treatments were applied 20 Jun and 11 Jul using a CO compressed air sprayer delivering 19.2 gpa at 40 psi in two passes directed along the sides of the planting. Evaluations were made by examining 10 plants per plot and counting all thrips present in the neck area of the onions.

scholarly journals Colorado Potato Beetle Control on Potatoes with In-Furrow Treatments, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 115-115
Author(s):  
James J. Linduska ◽  
Marylee Ross ◽  
Karen Mulford ◽  
John Nottingham
Keyword(s):  
Colorado Potato Beetle ◽  
Rating Scale ◽  
Block Design ◽  
Compressed Air ◽  
Single Treatment ◽  
Egg Masses ◽  
Row Crop ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Direct Counts

Abstract ‘Kennebec’ potatoes were planted in 20 foot rows on 25 Apr, ‘94. Plots consisted of a single treatment row. The distance between rows was 64 inches and the distance between plants within the row was 10 inches. Plots were arranged in a randomized complete block design with 4 replications. The soil was a Norfolk "A" loamy sand. Initial furrow treatments were applied to the seed at the rate of 20 gal per acre with a small watering can. Admire foliar treatments were applied at a rate of 50 gal per acre on 8, 23 and 29 Jun with a custom built compressed air row crop sprayer with each row being covered by 6 drop nozzles delivering 50 gal/acre at 30 psi. In evaluating the treatments, direct counts of the number of Colorado potato beetle adults, larvae and egg masses/10 plants and the % defoliation were recorded. Defoliation categories were assigned using a pretransformed defoliation rating scale, based on dividing 90° into 13 steps corresponding to arcsin transformation values (Little & Hills 1978). Yields were taken on 20 Jul from 20-ft of row.

scholarly journals Onion Thrips Control, Trial 1 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 141-141
Author(s):  
Whitney Cranshaw ◽  
D. Casey Sclar ◽  
D. Gerace ◽  
A. Tupy
Keyword(s):  
Block Design ◽  
Compressed Air ◽  
Onion Thrips ◽  
Randomized Complete Block Design ◽  
Neck Area

Abstract Trials were conducted in Ft. Collins, CO, using transplanted onions (cv. Vega) in single rows at 30-in spacing. Plots were 25-ft in length arranged in a randomized complete block design with 4 replications. Treatments were applied using a CO2 compressed air sprayer delivering 18.4 gpa at 40 psi in two passes directed along the sides of the planting. An organosilicant spreader (Kinetic, 6 fl oz/acre) was added to all treatments except the garlic solution (Guardian). Application dates varied among treatments. Evaluations were made by examining 10 plants per plot and counting all thrips present in the neck area of the onions.

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 Effect of Growth Retardants on Production of Containerized `Barbara Karst' Bougainvillea

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 679b-679
Author(s):  
James H. Aldrich ◽  
Jeffrey G. Norcini
Keyword(s):  
Growth Habit ◽  
Maleic Hydrazide ◽  
Block Design ◽  
Foliar Spray ◽  
Compressed Air ◽  
Growth Retardants ◽  
Bacterial Spot ◽  
Randomized Complete Block Design ◽  
Soilless Substrate ◽  
Bougainvillea Glabra

The effect of four PGRs on production of `Barbara Karst' bougainvillea [Bougainvillea × buttiana (Bougainvillea glabra Choicy × Bougainvillea peruviana Humb. & Bonpl.) was determined. Liners were transplanted into 3.8-L containers with a soilless substrate on 6 Apr. 1995 and were pruned on 15 May (mean height and width 23.6 and 34.5 cm, respectively). Uniconazole (10 ppm), maleic hydrazide (2808 ppm), daminozide (5000 ppm), and paclobutrazol (50, 100, or 200 ppm) were applied as a foliar spray (to wet) by a compressed air backpack sprayer on 16 May (0 weeks after treatment [WAT]). Daminozide (5000 ppm) was reapplied 31 May and 13 June as described above. Soil drenches of 5, 10, or 20 ppm paclobutrazol were additional treatments. Two nonPGR-treated controls were included: pruned at 0 WAT, and pruned at 0 and 4 WAT. There were eight replications per treatment placed in a randomized complete block design on a container bed under full sun and drip irrigation. At 6, 9, and 12 WAT, growth, flowering, growth habit, number of structural branches (>15 cm long), and level of bacterial spot infection by Pseudomonas andropogonis were recorded. Marketability was recorded 12 WAT and phytotoxicity noted 1, 4, 5, 6, 9, and 12 WAT. No PGR treatment effectively suppressed growth, or enhanced quality or marketability of `Barbara Karst' bougainvillea grown in 3.8-L containers. Furthermore, daminozide reduced the number of structural branches and maleic hydrazide was phytotoxic.

scholarly journals Flea Beetle Control in Broccoli, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 86-86
Author(s):  
Mohammed Al-Doghairi ◽  
Whitney Cranshaw ◽  
D. Casey Sclar ◽  
Dan Gerace ◽  
Andrea Tupy
Keyword(s):  
Block Design ◽  
Flea Beetle ◽  
Field Research ◽  
Compressed Air ◽  
Research Center ◽  
Row Spacing ◽  
Flea Beetles ◽  
Randomized Complete Block Design ◽  
Visual Observations

Abstract Trials were conducted on spring-transplanted (13 May) broccoli (cv. Green Comet) at the Horticulture Field Research Center in Ft. Collins, CO. Individual plots consisted 20 ft long single rows with 15-in in-row spacing, arranged in a randomized complete block design with four replications. Insecticide applications were made 3 Jun and 21 Jun using a CO2 compressed air sprayer delivering 15 gpa at 30 psi in two passes directed along the sides of the planting. An organosilicant spreader (Kinetic, 6 fl oz/A) was added to all treatments. Evaluations were made by visual observations of flea beetles on six plants/plot.

Plant and seed nutrient uptake in common bean in seven organic and conventional production systems

2011 ◽  
Vol 91 (6) ◽  
pp. 1089-1099 ◽  
Author(s):  
Dale Westermann ◽  
Henry Terán ◽  
Carlos Muñoz-Perea ◽  
Shree Singh
Keyword(s):  
Common Bean ◽  
Nutrient Uptake ◽  
Production Systems ◽  
Block Design ◽  
Dry Bean ◽  
Whole Plant ◽  
Randomized Complete Block Design ◽  
Conventional Production ◽  
On Farm ◽  
Uptake Of Nutrients

Westermann, D. T., Terán, H., Muñoz-Perea, C. G. and Singh, S. P. 2011. Plant and seed nutrient uptake in common bean in seven organic and conventional production systems. Can. J. Plant Sci. 91: 1089–1099. Knowledge of plant and seed nutrient uptake by crop cultivars in organic and conventional production systems (PS) is essential for breeding the most appropriate genotypes for each PS. The objective was to determine the plant and seed uptake of nitrogen (N), phosphorus (P), potassium (K), copper (Cu), manganese (Mn), and zinc (Zn) by 16 common bean genotypes. We also identified genotypes efficient in plant and seed nutrient uptake across seven organic and conventional PS. A randomized complete block design with four replicates (one plot per replicate) was used for evaluation in each of seven organic and conventional PS in 2003 and 2004. The effects of plant and seed uptake of nutrients, genotypes, PS, and the genotype × PS interaction were significant (P≤0.05). Plant and seed uptake of nutrients decreased in on-station continual dry bean and drought-stressed and on-farm organic low-input compared with on-station conventional irrigated and on-farm organic high-input PS. Common bean genotypes with higher biomass yield, in general, also had higher nutrient uptake, regardless of PS. In general, N and P uptakes were high and that for Mn was markedly low among common bean genotypes. Pinto CO46348, Bill Z, and Othello and Mexican red NW-63 and UI 239 were high-yielding and used nutrients more efficiently across seven organic and conventional PS and years. Other cultivars either had low biomass and seed yield (e.g., Common Pinto, Topaz, Common Red Mexican, UI 59) or were more efficient at whole-plant uptake or seed uptake of nutrients, but not both (e.g., Matterhorn, UI 465). Use of the above five genotypes should be maximized for production in both organic and conventional PS, and for breeding high-yielding broadly adapted cultivars efficient in plant and seed nutrient uptake in organic and conventional PS.

scholarly journals Effects of fresh and digested cowdung and poultry litter on the growth and yield of cabbage (Brassica oleracea)

2013 ◽  
Vol 48 (1) ◽  
pp. 1-6 ◽  
Author(s):  
MS Shahariar ◽  
M Moniruzzaman ◽  
B Saha ◽  
G Chakraborty ◽  
M Islam ◽  
...  
Keyword(s):  
Plant Growth ◽  
Brassica Oleracea ◽  
Yield Components ◽  
Block Design ◽  
Poultry Litter ◽  
Growth And Yield ◽  
Rabi Season ◽  
Plant Weight ◽  
Whole Plant ◽  
Randomized Complete Block Design

A field experiment was conducted during Rabi season in the experimental field of BCSIR to see the effects of fresh and digested cowdung (CD) and poultry litter (PL) bio-slurry on the growth and yield of cabbage (Brassica oleracea). The experiment was laid in a Randomized Complete Block Design (CRBD) with six different treatments including control. Cabbage variety Atlas-70 was transplanted at the age of 35 days and was harvested at 120 days. Plant height, circumference, marketable weights and whole plant weight were examined to perceive the effects on the growth and yield of cabbages. The experiment revealed that both digested PL and CD bio-slurry had a significant effect (P < 0.01) on the growth and yield components of cabbage. Increased plant growth and yield were in the order of digested PL bio-slurry > digested CD bio-slurry > fresh PL > fresh CD in combination with recommended dose of fertilizers (RDF). Among the treatments, the highest head yield of cabbage (97.6 t ha-1) was obtained from RDF + 5 t ha-1 digested PL bio-slurry which was 366 % higher than the control. DOI: http://dx.doi.org/10.3329/bjsir.v48i1.15382 Bangladesh J. Sci. Ind. Res. 48(1), 1-6, 2013

Effects of Rhizobium inoculation and cropping systems on macronutrients uptake and partitioning in two legumes (Common bean and Lablab)

2017 ◽  
Vol 51 (03) ◽  
Author(s):  
Prosper I. Massawe ◽  
Kelvin M. Mtei ◽  
Linus K. Munishi ◽  
Patrick A. Ndakidemi
Keyword(s):  
Agricultural Research ◽  
Cropping Systems ◽  
Block Design ◽  
Lablab Purpureus ◽  
Rhizobium Inoculation ◽  
Plant Parts ◽  
Cropping Season ◽  
Whole Plant ◽  
Randomized Complete Block Design ◽  
Cropping Seasons

The study to investigate the effect of Rhizobium inoculation and cropping systems on the uptake of macronutrients in shoot, root and whole plant of Phaseolus vulgaris and Lablab purpureus was conducted at Selian Agricultural Research Institute (SARI) for two cropping seasons. A randomized complete block design was used in a 3-factorial arrangement with two levels of Rhizobium (with and without rhizobia), two legumes (P. vulgaris and L. purpureus) and five cropping systems (sole maize or sole legumes, 1 row maize to 1 row legumes (1:1) i.e. 0 m or 0.45 m of legume from maize row, 1 row maize to 2 rows of legumes (1:2) i.e. 0.1 m or 0.2 m of legumes from maize rows). The result showed that Rhizobium inoculation significantly (P£0.001) increased the uptake of N, P, K, Ca and Mg in the plant parts and whole plant. Similarly, cropping systems significantly (P£0.001) increased the uptake of N, K and Mg in shoots and whole plant of P. vulgaris and L. purpureus but decreased the P and Ca content in roots. Legumes significantly increased the uptake of the macronutrients in shoots and roots but more nutrients concentration in shoots than roots for both cropping seasons. There were significant (P£0.001) interaction between; Rhizobium x legumes x cropping systems on whole plant uptake of N in cropping season 1 and 2. Regardless of the type of interaction, inoculated legumes maximized the uptake of macronutrients in shoots, roots and whole plant.

scholarly journals Production and nutritional quality of black oat forage grown in different population stands under a successive cutting regime

2020 ◽  
Vol 72 (5) ◽  
pp. 1936-1946
Author(s):  
A. Dochwat ◽  
M. Neumann ◽  
V.H. Bumbieris Junior ◽  
J.C. Heker Junior ◽  
F.B. Cristo ◽  
...  
Keyword(s):  
Crude Protein ◽  
Block Design ◽  
Neutral Detergent Fiber ◽  
Dry Matter Digestibility ◽  
Whole Plant ◽  
Randomized Complete Block Design ◽  
Dry Biomass ◽  
Compensatory Effect

ABSTRACT The present study aimed to evaluate the agronomic productive and qualitative traits of forage of black oats grown in different stands of plants. The experimental design was a 2 x 2 factorial randomized complete block design consisting of four treatments, two plant stands (175 and 350 plants m2) associated with two successive cutting periods (vegetative and full vegetative) and four replications. The stand of plants did not influence the production of dry biomass; with 175 plants m2, we obtained a compensatory effect by the greater number of tillers m2-1 and/or tiller plant-1. The population stand influenced the chemical parameters, where 175 plants m2 resulted in forage with higher contents of hemicellulose and total digestible nutrients and a lower content of neutral detergent fiber. In the comparison between cuts, the first cut compared to the second presented higher values of crude protein (26.53%). It is recommended that the black oat be cultivated with a population stand of 175 plants m2 for generating an increase in the number of tillers m2-1 and tillers plant-1, in addition to improving the in situ dry matter digestibility of the whole plant, without causing reduction of production of dry biomass per unit area.

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