scholarly journals FeSO4/lime mixtures – an alternative to mineral sulfur and lime fertilizer for summer rape

2017 ◽  
Vol 63 (No. 11) ◽  
pp. 525-530
Author(s):  
Steffens Diedrich ◽  
Hoffmann Janina
Keyword(s):  
Brassica Napus ◽  
Hydrated Lime ◽  
Pot Experiment ◽  
P Availability ◽  
Strong Reduction ◽  
Brassica Napus L ◽  
Seed Yields ◽  
S Application ◽  
S Fertilizers

Sulfur (S) is one of six important macronutrients and due to the strong reduction of atmospheric S, it has to be fertilized to cover the S demand of plants – especially of those with a high S demand. In addition to regular S fertilizers, FeSO<sub>4</sub> × 7 H<sub>2</sub>O was tested as a compound for a new S fertilizer. A pot experiment was conducted in order to test if FeSO<sub>4</sub> × 7 H<sub>2</sub>O, a by-product in TiO<sub>2</sub> production from ilmenite (FeTiO<sub>3</sub>), can be used in mixtures with limestone (CaCO<sub>3</sub>) or hydrated lime [Ca(OH)<sub>2</sub>] as an S fertilizer for summer rape (Brassica napus L). The results showed that S fertilization in the form of FeSO<sub>4</sub> × 7 H<sub>2</sub>O/lime mixtures resulted in the same effects on the S and phosphorus (P) availability to summer rape as a gypsum/CaCO<sub>3</sub> mixture. Application of S as FeSO<sub>4</sub> × 7 H<sub>2</sub>O/lime mixtures resulted in the same seed yields of summer rapes as compared to S application as a gypsum/CaCO<sub>3</sub> mixture. These results indicate that FeSO<sub>4</sub> × 7 H<sub>2</sub>O/lime mixtures can be used as a combined mineral S and lime fertilizer.

When is fall feeding by flea beetles (Phyllotreta spp., Coleoptera: Chrysomelidae) on canola (Brassica napus L.) a problem?

2012 ◽  
Vol 92 (1) ◽  
pp. 97-107
Author(s):  
Juliana J. Soroka ◽  
Larry F. Grenkow
Keyword(s):  
Brassica Napus ◽  
Field Experiments ◽  
Flea Beetle ◽  
Brassica Napus L ◽  
Late Season ◽  
The Third ◽  
Flea Beetles ◽  
Seeding Date ◽  
Seed Yields

Soroka, J. J. and L. F. Grenkow. 2012. When is fall feeding by flea beetles ( Phyllotreta spp., Coleoptera: Chrysomelidae) on canola ( Brassica napus L.) a problem? Can. J. Plant Sci. 92: 97–107. Two cultivars of Brassica napus canola were seeded in mid-May and early June in three field experiments in each of 3 yr near Saskatoon, Saskatchewan, to determine the effects of late-season flea beetle feeding on seed yields. In the first experiment, canola was sprayed with insecticide late in the summer to eliminate naturally-infesting flea beetles. In the second, 1×1×1.5 m screen cages were placed over early- and late-seeded canola at flowering and infested with flea beetles as canola matured. In the third investigation, sleeve cages were placed over individual plants and infested with 100 flea beetles. Flea beetles had no detrimental effects on early-seeded canola in any experiment, but did affect seed yields of late-seeded plots in some trials. Over two cultivars in 1 year, late-seeded plants in cube cages infested with about 350 flea beetles per plant when lower pods were turning from translucent to green in colour reduced yield by 241 kg ha−1 over control yields. Seed weights in these late-seeded plots were decreased from 2.68 g per 1000 seeds in uninfested cages to 2.44 g per 1000 seeds in infested cages. Populations of 100 flea beetles per plant in sleeve cages had no effect on harvest parameters in any seeding date or year.

scholarly journals Effects of sulfur application on sulfur and arsenic absorption by rapeseed in arsenic-contaminated soil

2011 ◽  
Vol 57 (No. 9) ◽  
pp. 429-434 ◽  
Author(s):  
L. Zhong ◽  
C. Hu ◽  
Q. Tan ◽  
J. Liu ◽  
X. Sun
Keyword(s):  
Brassica Napus ◽  
Contaminated Soil ◽  
Biomass Yield ◽  
Application Rate ◽  
Pot Experiment ◽  
Arsenic Content ◽  
Brassica Napus L ◽  
Treatment Application ◽  
Different Parts

A pot experiment was conducted to study the effects of arsenic (As) and sulfur (S) interaction on yield and their accumulation and distribution in rapeseed (Brassica napus L.). The results showed that (1) at the same level of S treatment, application of As significantly decreased rapeseed grain and biomass yield; (2) Application of S significantly increased the grain and biomass yield of rapeseed when As was applied; (3) When As application rate increased, As content significantly increased in different parts of rapeseed, and reached their highest level at<br />120 mg/kg As. Arsenic content from seed were all below 1 mg/kg AS. Addition of S significantly reduced As contents in root and grain of rapeseed.

Herbicide-tolerant canola: weed control and yield comparisons in western Canada

2000 ◽  
Vol 80 (3) ◽  
pp. 647-654 ◽  
Author(s):  
K. N. Harker ◽  
R. E. Blackshaw ◽  
K. J. Kirkland ◽  
D. A. Derksen ◽  
D. Wall
Keyword(s):  
Brassica Napus ◽  
Weed Control ◽  
Weed Management ◽  
Field Experiments ◽  
Standard Treatment ◽  
Growth Stages ◽  
Western Canada ◽  
Brassica Napus L ◽  
Standard Application ◽  
Seed Yields

Field experiments were conducted at five western Canadian locations in 1996 and 1997 to compare weed control and canola (Brassica napus L.) seed yields in the three major her-bicide-tolerant canola (HTC) systems. The main objective of this study was to determine if significant weed control and yield advantages could be expected by using herbicides "designated" for HTC compared to a more "standard" application of sethoxydim plus ethametsulfuron. In 3 of 10 site-years, glyphosate in Quest canola and imazethapyr/imazamox in 45A71 canola provided a yield advantage over the standard treatment. The yield advantages were restricted to the Lacombe and Lethbridge sites and ranged from 13 to 39% increases over the sethoxydim plus ethametsulfuron treatments. Among the HTC, weed control was usually greatest with glyphosate, followed by imazethapyr/imazamox, and then glufosinate. Glufosinate efficacy was often restricted due to advanced growth stages on some weeds. The standard treatment of sethoxydim plus ethametsulfuron did not provide better weed control than glyphosate, but in some cases did improve weed control compared to imazethapyr/imazamox or glufosinate. The HTC provide growers with new opportunities for the control of difficult weeds along with the option to employ in-crop herbicides with new modes of action in canola. Key words: Weed management, transgenic canola

Assessment of agronomic performance and heterosis for agronomic traits in hybrid high erucic acid rapeseed (HEAR)

2009 ◽  
Vol 89 (2) ◽  
pp. 227-237 ◽  
Author(s):  
R. D. Cuthbert ◽  
G. Crow ◽  
P. B. E. McVetty
Keyword(s):  
Brassica Napus ◽  
Erucic Acid ◽  
Seed Yield ◽  
Agronomic Traits ◽  
Brassica Napus L ◽  
High Erucic Acid ◽  
High Erucic Acid Rapeseed ◽  
Days To Maturity ◽  
The University ◽  
Seed Yields

Twelve genetically diverse and geographically distinct high erucic acid rapeseed (HEAR) Brassica napus L. cultivars/lines were selected and crossed by hand emasculation in a topcross design to produce 45 F1 hybrid combinations. Seven of the twelve parents were HEAR cultivars/lines developed by the University of Manitoba (UM) and the remaining five parents were proprietary European (EU) HEAR cultivars/lines. Adequate seed was produced to evaluate the hybrids and parents in replicated yield trials in six environments in Manitoba during 2004 and 2005. Vigor, days to first flower, days to maturity, lodging, plant height, and seed yield were assessed. The hybrids were generally more vigorous, taller and more lodging resistant than their parents with similar days to first flower and days to maturity as their earlier parents. The best hybrids in this study displayed high parent heterosis for seed yield of up to 143% and commercial heterosis for seed yield of up to 99%. These hybrids were from the most genetically diverse UM × EU crosses. HEAR hybrids appear very promising approach to increase seed yields in this crop. Key words: Brassica napus L., HEAR, heterosis, hybrids, genetic diversity

SEED PRODUCTION OF HYBRID SUMMER RAPE IN THE FIELD USING THE POL CYTOPLASMIC MALE STERILITY SYSTEM: A FIRST ATTEMPT

1990 ◽  
Vol 70 (3) ◽  
pp. 611-618 ◽  
Author(s):  
R. PINNISCH ◽  
P. B. E. McVETTY
Keyword(s):  
Brassica Napus ◽  
Male Sterility ◽  
Seed Production ◽  
Seed Yield ◽  
Hybrid Seed ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Brassica Napus L ◽  
Total Seed ◽  
Seed Yields

Hybrid summer rape (Brassica napus L.) seed production blocks were established at two locations in Manitoba in 1986 and 1987 to examine the effect of distance from the pollen source on seed yield, (both total and hybrid) and percent hybridity of seed produced on rows of a male sterile line of the open pollinated population B. napus cultivar, Marnoo, possessing the pol cytoplasmic male sterility inducing cytoplasm. A 10:1 ratio of male sterile line (A-line) to pollen parent was employed. Leaf cutter bees (Megachile rotundata F.) were used as the pollen vector between the two parents. In 1986, no significant differences in total seed yield were found among A-line rows, while in 1987, significant differences in total seed yields of A-line rows were found. Differences in hybrid seed yields among A-line rows were significant for all locations and years. Leaf cutter bees were found to be effective pollinators of the A-line plants. Less than half and less than a third of the seed produced on the A-line rows in 1986 and 1987, respectively, was hybrid seed. The high percentage of non-hybrid seed present in the seed lot may have been due to incomplete male sterility of the Marnoo A-line population. Total seed yields, hybrid seed yields and percent hybridity all declined linearly as distance from the pollen source increased. Improvement in the degree of male sterility of the Marnoo A-line population and/or a reduction in the 10:1 ratio of parents, and subsequent maximum A-line row to R-line row distance, will be necessary if hybrid summer rape seed production using this pol CMS A-line is to be commercially viable.Key words: Brassica napus L., CMS, hybrid, hybridity

CONTROL OF BARLEY AND WHEAT IN CANOLA WITH BAS 9052

1983 ◽  
Vol 63 (4) ◽  
pp. 1099-1102 ◽  
Author(s):  
P. N. P. CHOW ◽  
P. A. O’SULLIVAN ◽  
J. H. HUNTER ◽  
K. J. KIRKLAND
Keyword(s):  
Triticum Aestivum ◽  
Brassica Napus ◽  
Hordeum Vulgare ◽  
Brassica Campestris ◽  
Triticum Aestivum L ◽  
Hordeum Vulgare L ◽  
Brassica Napus L ◽  
Seed Yields

Control of barley (Hordeum vulgare L.) at Brandon and Lacombe, and wheat (Triticum aestivum L.) at Regina and Scott, in Canola (Brassica campestris L. and Brassica napus L.) with postemergence (three- to four-leaf) applications of BAS 9052 (2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)-propyl]-3-hydroxy-2-cylcohexen-1-one) mixed with Atplus 411F (0.5% vol/vol) were evaluated in 1979 and 1981. Control of barley and wheat was good to excellent with applications at 0.3 or 0.4 kg/ha and seed yields of canola were increased.Key words: Barley, wheat, canola, BAS 9052

scholarly journals Selectivity and stability of herbicides, herbicide tank mixtures and herbicide combinations on seed yield of Clearfield oilseed canola (Brassica napus L.)

2021 ◽  
Vol 13 (3) ◽  
pp. 280-284
Author(s):  
G. Delchev
Keyword(s):  
Brassica Napus ◽  
Field Experiment ◽  
Seed Yield ◽  
Untreated Control ◽  
Brassica Napus L ◽  
Emergence Period ◽  
Factor B ◽  
Seed Yields

Abstract. During the period 2018-2020 a field experiment was carried out with the winter Clearfield oilseed canola hybrid Phoenix CL (Brassica napus L). Factor A included the years of investigation. Factor B included untreated control, 2 combined herbicides: Cleranda SC and Cleravo SC; 6 herbicide tank mixtures: Electron 500 SC + Maza 4 SL, Springbok + Maza 4 SL, Tanaris + Maza 4 SL, Butisan max + Maza 4 SL, Cliofar 600 SL + Maza 4 SL and Galera super + Maza 4 SL; 6 herbicide combinations: Caliph 480 ЕC + Maza 4 SL, Caliph mega + Maza 4 SL, Bismark CS + Maza 4 SL, Nero ЕC + Maza 4 SL, Brasan 540 EC + Maza 4 SL and Colsor trio ЕC + Maza 4 SL. Herbicides Cleranda, Cleravo and Maza were used in addition with adjuvant Dash HC. Foliar-applied herbicides were treated during 2-4 leaf canola stage. Soil-applied combined herbicides were treated during after sowing before emergence period of the canola. It was found that: (i) the highest seed yields are obtained by use of combined herbicide Cleranda, followed by herbicide tank mixture Electron + Maza and combined herbicide Cleravo; (ii) the high canola yields are also obtained by herbicide tank mixtures Butizan max + Maza, Springbok + Maza, Tanaris + Maza, as well as by herbicide combinations Caliph mega + Maza, Brasan + Maza, Bismarck + Maza; (iii) technologically the most valuable are combined herbicide Cleranda, followed by herbicide tank mixture Electron + Maza and combined herbicide Cleravo; (iv) in terms of technology for growing winter Clearfield oilseed canola, herbicide tank mixtures Springbok + Maza, Butisan max + Maza and Tanaris + Maza, as well as herbicide combinations Caliph mega + Maza, Bismar + Maza and, Nero + Maza get high rating; herbicide tank mixtures Cliofar + Maza and Galera super + Maza and herbicide combinations Caliph + Maza and Colsor trio + Maza get low rating.

HETEROSIS IN SUMMER RAPE (Brassica napus L.)

1983 ◽  
Vol 63 (2) ◽  
pp. 407-413 ◽  
Author(s):  
J. L. SERNYK ◽  
B. R. STEFANSSON
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Quality Characteristics ◽  
Successful Development ◽  
Brassica Napus L ◽  
Pollination Control ◽  
Seed Yields ◽  
Yield Trials

The degree of heterosis for seed yield in F1 hybrids of summer rape (Brassica napus L.) was examined in replicated yield trials during 2 yr (1980 and 1981) using intervarietal hybrids produced by manual crossing. The seed yields from the F1 hybrids of crosses between Marnoo and Regent, and Karat and Regent exceeded those of Regent by 38 and 43%, respectively. With the possible exception of maturity, which was 1 day later than Regent, the agronomic and quality characteristics of these hybrids appeared to be within the ranges acceptable in commercial rapeseed cultivars. However, the successful development of hybrid rapeseed cultivars still depends upon the development of a suitable cytoplasmic, genetic or chemical (male gametocide) pollination control system.Key words: Brassica napus L., canola, intervarietal hybrids

Relationships among root maggot (Delia spp., Diptera: Anthomyiidae) infestation, root injury, and seed yields of canola Brassica napus L. and Brassica rapa L.

2020 ◽  
Vol 100 (5) ◽  
pp. 575-591
Author(s):  
J.J. Soroka ◽  
R.M. Weiss ◽  
L.F. Grenkow ◽  
O.O. Olfert
Keyword(s):  
Brassica Napus ◽  
Brassica Rapa ◽  
Delia Radicum ◽  
Root Damage ◽  
Response Curves ◽  
Land Use Patterns ◽  
Brassica Napus L ◽  
Root Injury ◽  
Root Maggot ◽  
Seed Yields

This study investigated the relationships between numbers of Delia species (Delia spp. Rob.-Desv., Diptera: Anthomyiidae) flies or eggs and root injury levels of Brassica napus L. and Brassica rapa L. (Brassicaceae) canola (oilseed rape), and between root injury levels and canola seed yields. Wild-collected Delia species adult flies or laboratory-obtained Delia radicum (L.) eggs were introduced into laboratory or field cages containing B. napus or B. rapa plants. The degree of root injury was strongly associated with infestation level using both flies and eggs. Linear response curves between numbers of Delia flies and root injury levels and quadrilinear response curves between numbers of D. radicum eggs and root injury levels showed that root damage increased with increasing levels of infestation; at high egg infestation levels, root damage levelled off in both Brassica species. Seed yield was not clearly related to fly or egg infestation rate, nor to ensuing root damage. No consistent yield relationship in B. napus ‘AC Excel’ was found with levels of root damage seen in the investigation. Conversely, B. rapa cultivar ‘AC Boreal’ seed yields tended to increase above uninfested controls when feeding damage was light but decreased with increased root injury. Despite procedures used to prevent infestation in Delia-free control cages, some root maggot damage was found in control cages in all 4 yr of the field study. Changes in climate, land use patterns, and cropping systems could influence the economic impact of this pest complex on canola in the future.

Isogenic analysis of glufosinate-ammonium tolerant and susceptible summer rape lines

1998 ◽  
Vol 78 (3) ◽  
pp. 401-408 ◽  
Author(s):  
A. Kumar ◽  
G. Rakow ◽  
R. K. Downey
Keyword(s):  
Brassica Napus ◽  
Seed Quality ◽  
Field Trials ◽  
Brassica Napus L ◽  
Glufosinate Ammonium ◽  
Pat Gene ◽  
Transgenic Lines ◽  
Ammonium Tolerance ◽  
Delayed Flowering ◽  
Seed Yields

The development of transgenic Brassica napus L., tolerant to non-selective broad-spectrum herbicides, such as glyphosate and glufosinate-ammonium, could provide canola growers with an efficient method of weed control. The objective of this study was to determine whether the phosphinothricin-acetyl transferase (pat) gene which imparts tolerance to glufosinate-ammonium, affects the growth, development, productivity, and seed quality of B. napus canola. Nineteen glufosinate-ammonium tolerant and susceptible isogenic pairs of the B. napus cv. Westar, derived from independent transformation events, were evaluated in two field trials in each of 2 yr in Saskatchewan. Tolerant lines of six isogenic pairs were similar in their agronomic performance and seed quality to their susceptible counterparts indicating that glufosinate-ammonium tolerant B. napus can be developed that is not negatively affected in yield and quality by the presence of the pat gene. Several tolerant lines exhibited delayed flowering and maturity, lower biomass and seed yields, and lower oil and protein contents indicating positional effects of the pat gene on performance. Tolerant lines carrying two inserts of the pat gene were more negatively affected in their growth and development than single insert tolerant lines. The results of this study indicate that it would be beneficial to generate a number of different transformants and select elite transgenic lines which are not affected in their performance by the presence of the pat gene for use in cultivar development. Key words: Brassica napus, glufosinate-ammonium tolerance, isogenic analysis

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