scholarly journals Onion Thrips Control, 1992

1994 ◽  
Vol 19 (1) ◽  
pp. 103-103
Author(s):  
M. Davis ◽  
E. Grafius ◽  
M. Bommarito ◽  
M. Tindall ◽  
B. Ferrari ◽  
...  
Keyword(s):  
Block Design ◽  
Onion Thrips ◽  
Randomized Complete Block Design ◽  
Direct Seeded ◽  
A Site ◽  
Flat Fan Nozzle

Abstract Onions were direct seeded on 1 May at a site in Ingham County, MI. Plots were 20 ft long double rows with 16 inch spacing between double rows. Treatments were arranged in a randomized complete block design (four replications per treatment) with one unsprayed buffer row between each treatment row. Foliar treatments were applied with a hand-held CO2 sprayer with a single flat fan nozzle (TEEJET 8002VS) at 45 psi and 60 gal/acre. The NTN sidedress treatment was applied 9 Jul in a 1 inch furrow, 3 inches from the base of the plants, then covered with soil. The NTN foliar and the NTN foliar plus spreader treatments were first applied on 24 Jul; all foliar treatments (including NTN) were applied on 4, 11, and 18 Aug. Plots untreated as of 4 Aug (i.e. all but the NTN treatments) were sampled for thrips. Ten consecutive plants/replication were randomly selected and the thrips rinsed off the plants with approximately 250 ml of 75% ethanol. Thrips were filtered out of the ethanol and counted. On 6 and 20 Aug all treatments were sampled for thrips as described above.

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 Seed Yield and Quality of Late Season Direct Seeded Kenaf (Hibiscus cannabinus L.) as Influenced by Spacing and Time of De-topping

2017 ◽  
Vol 15 (1) ◽  
pp. 92-100
Author(s):  
Md. Abul Fazal Mollah ◽  
Md. Moshiur Rahman ◽  
Md. Zablul Tareq ◽  
ABM Zahidul Hoque ◽  
Mir Mehedi Hasan
Keyword(s):  
Seed Yield ◽  
Block Design ◽  
Hibiscus Cannabinus ◽  
Late Season ◽  
Yield And Quality ◽  
Seeding Method ◽  
Randomized Complete Block Design ◽  
Direct Seeded ◽  
Kenaf Seed

An experiment was conducted at the Bangladesh Jute Research Institute (BJRI), Regional Station, Kishoreganj during July to December of 2010 and 2011 to investigate the effect of spacing and de-topping on yield and quality of kenaf seeds cv. HC-95 grown under direct seeding method. Three plants spacings (40 cm × 15 cm, 30 cm × 15 cm and 20 cm × 15 cm) and four de-topping treatments (no de-topping, de-topping at 15, 30 and 45  days after emergence (DAE) were applied in a Randomized Complete Block Design (RCBD) with three replications. The highest yield of kenaf seed (1403 and 1646 kgha-1 in 2010 and 2011, respectively) was obtained from sowing at 30 cm × 15 cm spacing. The best quality seed in respect to germination and vigour was also obtained from sowing at 30 cm × 15 cm spacing. The highest seed yield, germination and vigour of seed were obtained for de-topped at 45 days after emergence. It is concluded that the highest seed yield and quality of late season direct seeded kenaf could be obtained by sowing at a spacing of 30 cm x 15 cm and de-topping at 45 days after emergence. The Agriculturists 2017; 15(1) 92-100

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 Control of Aphids on Lettuce, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 134-134
Author(s):  
Casey W. Hoy ◽  
Michael J. Dunlap
Keyword(s):  
Block Design ◽  
Plant Spacing ◽  
Randomized Complete Block Design ◽  
Leaf Lettuce ◽  
Experimental Plots ◽  
Plant Treatment ◽  
Aphid Populations ◽  
Flat Fan Nozzle

Abstract ‘Red Fire’ leaf lettuce was planted at the Muck Crops Branch, Celeryville, OH, on 6 Aug. The field was fertilized with 800 lbs of 17-17-17 per acre. The experimental plots were three rows 20 inches apart, 30 ft long, with plant spacing at 12 inches within rows. Each treatment was replicated four times in a randomized complete block design. Pretreatment aphid counts were made 11 Sep by randomly selecting plants from the outside rows of each plot in replicates one and two and counting the number of aphids per plant. Pretreatment aphid counts averaged 32.2 aphids per plant. Treatment applications were made 11 and 19 Sep using a backpack sprayer delivering 50 gal/acre at 50 psi with a flat fan nozzle. Aphid populations were evaluated 17 and 26 Sep by randomly selecting five lettuce plants from the middle row of each plot and counting the density of aphids on each plant.

scholarly journals EVALUATION OF NEW HERBICIDE MOLECULES IN DIRECT SEEDED RICE

2020 ◽  
pp. 524-532
Keyword(s):  
Technology Transfer ◽  
Grain Yield ◽  
Block Design ◽  
Regional Research ◽  
Experimental Block ◽  
Randomized Complete Block Design ◽  
Weed Control Efficiency ◽  
Transfer Station ◽  
Direct Seeded ◽  
Hand Weeding

An experiment was conducted at Field Experimental Block, Regional Research and Technology Transfer Station, Keonjhar, during Kharif season of two consecutive years of 2015 and 2016 under RKVY project to evaluate new herbicide molecules in direct seeded rice. The experiment was laid out in a Randomized Complete Block Design with eight treatments combinations and three replications. The eight treatment combinations studied were as follows: T1: Oxadiargyl (Topstar 80% WP) @ 87.5 g/ha as PE (2 DAS) fb Bispyribac sodium (Fujisuper 10% SC) @200 ml/ha as POE at 25 DAS, T2: Pyrazosulphuron Ethyl (Saathi-10%WP)-@ 200g/h as PE-2DAS fb Bispyribac sodium (Fujisuper 10% SC) @200 ml/ha as POE at 25 DAS, T3: Pendimethalin (Pendiherb 30% EC) @ 3000ml/ha as PE fb Bispyribac sodium (Fujisuper 10% SC) @200 ml/ha as POE at 25 DAS, T4:Pretilachlor(Rifit-50% EC) @ 1000ml/ha -2DAS as PE fb Bispyribac sodium (Fujisuper 10% SC) @200 ml/ha as POE at 25 DAS, T5: Pretilachlor(Rifit-50% EC) @ 1000ml/ha as PE 2DAS fb Metsulphuron Ethyl+Chlorimuron Methyl (Almix-20%) @ 40g/ha POE 45 DAS , T6: Penoxulam (Granite-12.7% EC)@ 92.3 ml/ha as POE 15 DAS, T7: Hand weeding twice at 25 and 50 DAS, T8 : Un-weeded Control. . Results revealed that application of Penoxsulam @ 20 ml/ha at 15 DAS as PoE (T6) produced grain yield of 38.1 q/ha and weed control efficiency (WCE) of 89.1% at par with hand weeding at 25 & 50 DAS (T7) with grain yield of 41.8 q/ha and WCE of 92.3%, but found superior in respect of net return (Rs.23430/ha) and B:C ratio (2.0)

scholarly journals Effect of Trichoderma and fungicide on seedling establishment and yield performance of dry direct seeded boro rice

2016 ◽  
Vol 14 (1) ◽  
pp. 37-42
Author(s):  
MM Hassan ◽  
S Hossain ◽  
MM Rahman ◽  
S Mahmud
Keyword(s):  
Seedling Establishment ◽  
Seed Treatment ◽  
Block Design ◽  
Seedling Mortality ◽  
Yield Performance ◽  
Major Barrier ◽  
Randomized Complete Block Design ◽  
Direct Seeded ◽  
And Control ◽  
Boro Rice

Poor seedling establishment and seedling mortality is the major barrier to optimum stand establishment in dry direct seeded boro rice. Experiments were carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh during January to June 2013 to study the effect of Trichoderma and fungicide application on seedling establishment and yield performance of dry direct seeded Boro rice. The experiment comprised ten treatment combinations of Trichoderma and fungicides viz. seed treatment with Trichoderma (M1), seed treatment with Trichoderma+spraying of Thiovit (M2), seed treatment with Trichoderma + spraying of Propiconazole (M3), seed treatment with Trichoderma + spraying of Thiovit and Propiconazole (M4), spraying of Thiovit (M5), spraying of Propiconazole (M6), seed treatment with Thiovit + spraying of Propiconazole (M7), seed treatment with Propiconazole + spraying of Thiovit (M8), spraying of mixture of Thiovit and Propiconazole (M9), and control (no fungicide or Trichoderma ) (M10).The experiments used Randomized Complete Block Design (RCBD) with three replications. Experiment revealed that seed treatment with Trichoderma harzianum followed by spraying of Thiovit gave the highest yield of rice. The study concludes that Trichoderma and then application of sulphur fungicide at 20 days after sowing could be practiced for ensuring high seedling establishment and yield of rice under dry direct seeded system in boro season.J. Bangladesh Agril. Univ. 14(1): 37-42, June 2016

scholarly journals Effect of spacing and number of seedlings per hill on the performance of aus rice cv. NERICA 1 under dry direct seeded rice (DDSR) system of cultivation

2013 ◽  
Vol 10 (2) ◽  
pp. 191-196 ◽  
Author(s):  
SK Bhowmik ◽  
MAR Sarkar ◽  
F Zaman
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Harvest Index ◽  
Block Design ◽  
Grain Weight ◽  
Straw Yield ◽  
Randomized Complete Block Design ◽  
Biological Yield ◽  
Direct Seeded ◽  
1000 Grain Weight

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from April to August 2011 to find out the effect of spacing and number of seedlings hill-1 on the performance of Aus rice cv. NERICA 1. Four spacing viz. 25 cm × l5 cm, 20 cm × l5 cm. 20 cm × 10 cm and 15 cm × 10 cm and four number of seedlings hill-1 viz. 2, 3, 4 and 5 were included in the experiment. The experiment was laid out in a randomized complete block design with three replications. The highest number of total tillers m-2, number of effective tillers m-2, number of grains panicle-1, grain yield, straw yield, biological yield and harvest index were obtained from 20 cm × 10 cm spacing. Plant height and 1000- grain weight were not significantly affected by spacing. Number of seedlings hill-1 exerts a significant effect on plant height. The highest value of total tillers m-2, number of effective tillers m-2, total grains panicle-1, grain yield, straw yield, biological yield and harvest index were obtained from five seedlings hill-1. The interaction between spacing and number of seedlings hill-1 significantly influenced yield and plant characters. The highest number of effective tillers m-2, grains panicle-1, grain yield, straw yield and biological yield were recorded from the interaction between 20 cm × 10 cm and five seedlings hill-1. DOI: http://dx.doi.org/10.3329/jbau.v10i2.14681 J. Bangladesh Agril. Univ. 10(2): 191-195, 2012

scholarly journals Control of Sweetpotato Whitefly in Cantaloupe with Various Pesticides, 1992

1994 ◽  
Vol 19 (1) ◽  
pp. 80-80 ◽  
Author(s):  
J. C. Palumbo ◽  
C. H. Mullis ◽  
F. J. Reyes
Keyword(s):  
Cucumis Melo ◽  
Block Design ◽  
Bottom Surface ◽  
Local Practices ◽  
Water Plant ◽  
University Of Arizona ◽  
Randomized Complete Block Design ◽  
Direct Seeded ◽  
The University ◽  
Terminal Area

Abstract Cantaloupes, Cucumis melo, ‘Topmark’ were direct seeded on 3 Mar into single row “yuma beds” on 203 cm centers and thinned to 30 cm intervals at the University of Arizona, Yuma Valley Agricultural Center. Plots consisted of 4 beds, 18 m long with a 3.6 m buffer between plots. Plot preparation and seasonal maintenance followed local practices. Plots were arranged in a randomized complete block design with 4 replicates. Applications were made with a 4-row highpressure, electrostatic boom sprayer equipped with stainless steel, hollow-cone nozzles (TX-18) spaced at 50 cm and delivered 563 liters/ha at 400 psi. Admire was applied as a soil drench in 40 oz of water/plant one week after thinning (5 Apr). Foliar applications were initiated when immature whitefly densities exceeded 3 nymphs/leaf. A total of 3 applications of CGA215944 and Fenoxycarb were made on 29 Apr and 5, 14 May. The remaining foliar treatments were applied 5 times on 29 Apr, 5, 14, 20, and 28 May. The pH of the application water was 7.1. A spreader/sticker was not used. Insect data were collected only from the inner two beds of each plot. Plots were sampled weekly beginning on 14 Apr, and terminating on 9 June. Adult SPWF were assessed by randomly selecting 20 leaves from the terminal area on primary vines (4th fully expanded leaf from the apex of the vine) and counting the number of live adults on the bottom surface. Counts were made at sunrise between 0500-0600 hrs. Immatures were assessed by counting the number of eggs, small nymphs, large and red-eyed nymphs, and eclosed pupal cases on two-cm2 disk sections from each of 10 leaves per plot.

Effect of Boron and Molybdenum Fertilization on `Spineless Beauty' Zucchini (Cucurbita sp.)

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 445c-445
Author(s):  
J. Pablo Morales-Payan
Keyword(s):  
Detection Limit ◽  
Dominican Republic ◽  
Clay Soil ◽  
Block Design ◽  
Field Trials ◽  
Yield Data ◽  
Foliar Fertilization ◽  
Randomized Complete Block Design ◽  
Direct Seeded ◽  
Production Practices

The effect of boron (B) and molybdenum (Mo) foliar fertilization on `Spineless Beauty' zucchini (Cucurbita sp.) fruit yield was studied in Nigua, San Cristobal, Dominican Republic. Field trials were conducted in a loamy clay soil containing 0.3 parts per million (ppm) of B and no detectable amounts of Mo (detection limit 0.1 ppm). Zucchini was direct-seeded at a distance of 1 m between rows and 0.5 m within rows. Fertilization (except B and Mo applications) and other production practices were implemented as recommended. A randomized complete-block design with a factorial arrangement (0, 1, 2, and 3 kg B and 0, 0.1, and 0.2 kg Mo/ha) with four replications was utilized. Experimental units consisted of five plants. Fruits were harvested every other day during 20 days, starting 40 days after crop emergence. Yield data was submitted to analysis of variance. Significant B and Mo rate interactions were found. Maximum zucchini yields were achieved when the combination of 1.5 kg B and 0.1 kg Mo/ha was applied. Combinations containing 3 kg B/ha were toxic to zucchini, reducing yields in nearly 20% as compared to untreated plants.

Zinc, Manganese, and Iron Fertilization in `Spineless Beauty' Zucchini (Cucurbita sp.)

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 445b-445
Author(s):  
J. Pablo Morales-Payan
Keyword(s):  
Aqueous Solution ◽  
Clay Soil ◽  
Block Design ◽  
Field Trials ◽  
Yield Response ◽  
Foliar Fertilization ◽  
Iron Fertilization ◽  
Randomized Complete Block Design ◽  
Direct Seeded ◽  
Fruit Harvest

Zucchini (Cucurbita sp.) fruit yield response to zinc (Zn), manganese (Mn), and iron (Fe) foliar fertilization was determined in field trials conducted in a loamy clay soil in Nigua, San Cristobal, Dominican Republic. The soil had Zn, Mn, and Fe contents of 1.2, 8, and 2 parts per million (ppm), respectively. `Spineless Beauty' zucchini was direct-seeded at a distance of 1 m between rows and 0.5 m within rows. Except for Zn, Mn, and Fe fertilization, the crop was grown according to recommended practices. Experimental units contained five plants. A randomized complete-block design with a factorial arrangement (3 × 3 × 3) with four replications was utilized. Micronutrient rates were 0, 1, and 3 kg·ha–1 for Zn; 0, 3, and 6 kg·ha–1 for Mn; and 0, 3, and 6 kg·ha–1 for Fe. Total rates were divided in two 50% rate applications, sprayed in aqueous solution to the crop leaves 15 and 30 days after emergence. Fruit harvest began 40 days after crop emergence and was performed every other day during 20 days. Resulting data was subjected to analysis of variance. There were significant Zn, Mn, and Fe interactions, and thus micronutrient combinations were considered as individual treatments. Treatment means were separated with the lsd 5% test. Zucchini plants treated with a combination of 3 kg Zn/ha, 3 kg Mn/ha, and 3 kg Fe/ha produced fruit yields 31.5% higher than control plants. Combinations including higher Mn and Fe rates failed to further increase zucchini yields.

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