Effects of Seeding Date and Seed Size on Crassostrea gigas (Thunberg, 1793) Culture in a Subtropical Climate

2017 ◽  
Vol 36 (2) ◽  
pp. 303-313
Author(s):  
Simone Sühnel ◽  
Thais Picanço ◽  
Sthefanie Caroline Medeiros ◽  
Aimê Rachelmagentamagalhães ◽  
Claudiomanoel Rodrigues Demelo
Keyword(s):  
Seed Size ◽  
Crassostrea Gigas ◽  
Subtropical Climate ◽  
Seeding Date

Effect of seeding date and depth, seed size and fungicide treatment on Fusarium and Pythium seedling blight of canola

2015 ◽  
Vol 95 (2) ◽  
pp. 293-301 ◽  
Author(s):  
S. F. Hwang ◽  
H. U. Ahmed ◽  
G. D. Turnbull ◽  
B. D. Gossen ◽  
S. E. Strelkov
Keyword(s):  
Seed Size ◽  
Seed Yield ◽  
Seed Treatment ◽  
Seedling Emergence ◽  
Pythium Ultimum ◽  
Seedling Blight ◽  
Substantial Impact ◽  
Fungicide Treatment ◽  
Stand Establishment ◽  
Seeding Date

Hwang, S. F., Ahmed, H. U., Turnbull, G. D., Gossen, B. D. and Strelkov, S. E. 2015. Effect of seeding date and depth, seed size and fungicide treatment on Fusarium and Pythium seedling blight of canola. Can. J. Plant Sci. 95: 293–301. Seedling blight has a substantial impact on stand establishment and productivity of canola (Brassica napus) on the Canadian prairies. The effects of seeding date, seed size, seeding depth, and seed treatment fungicides on seedling blight of canola caused by Fusarium avenaceum and Pythium ultimum were evaluated under field conditions. In the trials inoculated with P. ultimum, early seeding reduced seedling emergence and seed yield in all 3 yr of the study. However, the interaction of F. avenaceum with seeding date was not consistent; inoculation with F. avenaceum reduced seedling emergence in early seeded canola in 1 of 4 yr, but emergence was higher in early than in mid-seeded treatments in 2 yr and there was no difference among seeding dates in 1 yr. Late seeding reduced seed yield in 2 of 4 yr in the F. avenaceum study. Seed size and seeding depth generally did not have an effect on seedling establishment or seed yield for either pathogen. Seed treatment with Helix Xtra (thiamethoxam+difenconazole+metalaxyl+fludioxonil) and Prosper FX (clothianidin+carboxin+trifloxystrobin+metalaxyl) fungicides increased seedling emergence and yield compared with the F. avenaceum-inoculated control. Seed treatment with Helix Xtra also increased seedling emergence and seed yield compared with the P. ultimum-inoculated control. Manipulation of seeding date did not substantially improve stand establishment or yield of canola when inoculum pressure was high. Seed treatment was the most effective strategy for reducing losses caused by seedling blight of canola in fields infested with F. avenaceum or P. ultimum.

EFFECT OF DATE AND RATE OF SEEDING, ROW SPACING AND FERTILIZATION ON LENTIL

1989 ◽  
Vol 69 (2) ◽  
pp. 377-381 ◽  
Author(s):  
S. T. ALI-KHAN ◽  
F. A. KIEHN
Keyword(s):  
Seed Size ◽  
Lens Culinaris ◽  
Plant Population ◽  
Row Spacing ◽  
Seeding Rate ◽  
Seeding Date ◽  
Narrow Row ◽  
High Yields

The effect of seeding date, seeding rate, row spacing and fertilizer level were investigated in two cultivars of lentil (Lens culinaris Medik.), Eston and Laird, in Manitoba. High yields were obtained by early seeding, narrow row spacing (15 cm) and high seeding rate (100 plants m−2). Response to fertilizer levels was variable. Early seedings produced larger seeds. Effects of other treatments on seed size were not significant.Key words: Lentil, seeding date, seeding rate, plant population, fertilizer level

EFFECT OF SEEDING DEPTH, SEEDING DATE AND SEED SIZE ON COMMON ROOT ROT OF SPRING BARLEY

1982 ◽  
Vol 62 (4) ◽  
pp. 885-891 ◽  
Author(s):  
L. J. DUCZEK ◽  
L. J. PIENING
Keyword(s):  
Grain Yield ◽  
Seed Size ◽  
Root Rot ◽  
Yield Loss ◽  
Spring Barley ◽  
Field Trials ◽  
Common Root ◽  
Common Root Rot ◽  
Seeding Date ◽  
Seeding Emergence

The effects of variable seeding depth and dates of seeding of barley on the incidence of root rot, and on emergence and grain yield were investigated in field trials at Saskatoon and Scott, Saskatchewan. The effect of variable seeding depth of barley on intensity of root rot, grain yield, loss of yield due to root rot, and the effect of variable seed size of barley on incidence of root rot and yield were also investigated in field trials at Lacombe, Alberta. Symptoms of common root rot, based on lesions on the subcrown internode, were not influenced by seed size or seeding date but the disease increased with depth of seeding. Grain yield decreased with depth and with late seeding. Emergence was not affected by seeding date but decreased with depth of seeding. Common root rot was not associated with the reduced yields of later seeding dates but was associated with reduced yields of increased seeding depths. The increased emergence and reduced disease at shallow depths resulted in a greater number of clean plants which probably accounts for some of the increased grain yield at shallow seeding depths.

The effect of seed size, seed treatment, seeding date and depth on Rhizoctonia seedling blight of canola

2013 ◽  
pp. 150113084625001
Author(s):  
Sheau-Fang Hwang ◽  
Hafiz U. Ahmed ◽  
George D. Turnbull ◽  
Bruce Gossen ◽  
Stephen Strelkov
Keyword(s):  
Seed Size ◽  
Seed Treatment ◽  
Seedling Blight ◽  
Seeding Date

The effect of seed size, seed treatment, seeding date and depth on Rhizoctonia seedling blight of canola

2014 ◽  
Vol 94 (2) ◽  
pp. 311-321 ◽  
Author(s):  
S. F. Hwang ◽  
H. U. Ahmed ◽  
G. D. Turnbull ◽  
B. D. Gossen ◽  
S. E. Strelkov
Keyword(s):  
Seed Size ◽  
Seed Yield ◽  
Seed Treatment ◽  
Seedling Emergence ◽  
Dry Weight ◽  
Field Trials ◽  
Seedling Blight ◽  
Substantial Impact ◽  
Seeding Date ◽  
The Impact

Hwang, S. F., Ahmed, H. U., Turnbull, G. D., Gossen, B. D. and Strelkov, S. E. 2014. The effect of seed size, seed treatment, seeding date and depth on Rhizoctonia seedling blight of canola. Can. J. Plant Sci. 94: 311–321. Rhizoctonia solani can have a substantial impact on seedling establishment and productivity of canola (Brassica napus). The effects of seeding date, seeding depth, seed size, and seed treatment on seedling blight of canola were evaluated under greenhouse and field conditions. Early seeding resulted in higher seedling emergence in one trial year and higher seed yield in all trial years relative to a late-seeded treatment. Mid-sized seed (range 0.7–2.0 mm diam.) had greater seedling emergence in R. solani-inoculated growth medium in a greenhouse trial and higher seed yield in one of two field trials compared with smaller seed (<0.7 mm). In the greenhouse study, sowing of large seed resulted in greater plant height and shoot weight compared with sowing of smaller seed. The effect of seeding depth was significant only on shoot dry weight, which increased at a seeding depth of 2.6 cm. Seed treatment with Helix Xtra (thiamethoxam+difenconazole+metalaxyl+fludioxonil), and Prosper FX (clothianidin+carboxin+trifloxystrobin+metalaxyl) resulted in a significant increase in seedling emergence and yield compared with the inoculated control. These results indicate that fungicidal seed treatment can minimize the impact of R. solani on canola.

Chickpea, lentil and pea response to delayed spring seeding on the Northern Great Plains

2006 ◽  
Vol 86 (4) ◽  
pp. 1059-1070 ◽  
Author(s):  
P. R. Miller ◽  
S. A. Brandt ◽  
C. L. McDonald ◽  
J. Waddington
Keyword(s):  
Seed Size ◽  
Great Plains ◽  
Seed Yield ◽  
Growth Stage ◽  
Plant Density ◽  
Crop Yields ◽  
Crop Growth ◽  
Northern Great Plains ◽  
Summer Drought ◽  
Seeding Date

We compared the effects of spring seeding date on stand density, crop growth, seed yield, water-use-efficiency, and grain quality of three pulse crops [chickpea (Cicer arietinum L.), lentil (Lens culinaris Medik.) and pea (Pisum sativum L.)] grown at Scott and Swift Current, SK, during 1993 to 1997. Wheat (Triticum aestivum L. emend. Thell.) was used as a reference crop. Seeding date did not meaningfully affect plant density for chickpea, lentil or pea. Crop growth stage related to thermal time resulted in robust prediction equations for chickpea, lentil and pea (R2 = 0.87 to 0.98). When seeding was delayed 2 wk, the crop response was inconsistent. When seeding was delayed by 4 wk, consistent, mainly negative, effects on crop parameters occurred due to the exacerbation of summer drought stress. Pulse crop yields were more negatively affected by delayed seeding than were wheat yields. When seeding of chickpea, lentil, and pea was delayed 4 wk, seed yield decreased at the majority of site-years. When yield reductions occurred, the average reductions were 44, 38, and 31%, for the respective species. For chickpea and lentil, seeding delays of 2 and 4 wk decreased seed size at the majority of site-years with seed size reductions averaging 10% when they occurred. In the semiarid Northern Great Plains (NGP), chickpea, lentil, and pea should be seeded before spring wheat due to a greater risk of loss of yield and quality. Key words: Chickpea, growth stage, lentil, northern great plains, pea, seeding date

Seeding Date, Plant Density, and Cultivar Effects on Chickpea Yield and Seed Size in Eastern Oregon

2006 ◽  
Vol 5 (1) ◽  
pp. CM-2006-0621-01-RS ◽  
Author(s):  
Stephen Machado ◽  
Christopher Humphreys ◽  
Brian Tuck ◽  
Mary Corp
Keyword(s):  
Seed Size ◽  
Plant Density ◽  
Seeding Date

FloRunTM ‘331’ Peanut Variety

EDIS ◽  
2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Barry L. Tillman
Keyword(s):  
Seed Size ◽  
Growth Habit ◽  
Yield Potential ◽  
High Yield ◽  
University Of Florida ◽  
High Oleic ◽  
Central Stem ◽  
Research And Education ◽  
The University ◽  
High Yield Potential

FloRunTM ‘331’ peanut variety was developed by the University of Florida, Institute of Food and Agricultural Sciences, North Florida Research and Education Center near Marianna, Florida.  It was released in 2016 because it combines high yield potential with excellent disease tolerance. FloRunTM ‘331’ has a typical runner growth habit with a semi-prominent central stem and medium green foliage.  It has medium runner seed size with high oleic oil chemistry.

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