scholarly journals CHANGE IN PHYSIOLOGICAL FEATURES IN RYEGRASS BIOTYPES IN COMPETITION WITH SOYBEAN DUE RESISTANCE TO GLYPHOSATE

2016 ◽  
Vol 34 (3) ◽  
pp. 517-526 ◽  
Author(s):  
D. AGOSTINETTO ◽  
C. OLIVEIRA ◽  
A.C. LANGARO ◽  
M.A. NOHATTO ◽  
R. MANICA-BERTO
Keyword(s):  
Oxidative Damage ◽  
Competitive Ability ◽  
Cellular Damage ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Replacement Series ◽  
Randomized Design ◽  
Phenological Changes ◽  
Activity Of Enzymes ◽  
Completely Randomized Design

ABSTRACT Herbicide resistance can cause biochemical, physiological, morphological and phenological changes in weeds, altering their competitive ability against crops. The aim of the study was to assess physiological changes and cellular damage in susceptible and resistant biotypes of ryegrass and soybeans under competition. Three experiments were conducted in a greenhouse using a completely randomized design with four replications performed in a replacement series. The ratios of soybean and to susceptible (experiment 1) and resistant ryegrass (experiment 2) and of susceptible to resistant (experiment 3) ryegrass were 100:0, 75:25, 50:50, 25:75 and 0:100. Forty days after the emergence of the soybean crop and 60 days after the emergence of the ryegrass plants, the leaves of the competing plants were collected. The following variables were assessed: the levels of carotenoids, chlorophylls and total phenolic compounds; amount of hydrogen peroxide; degrees of lipid peroxidation and electrolyte leakage; and activity of enzymes catalase, superoxide dismutase and ascorbate peroxidase. The production of phenols and increased oxidative damage due to interspecies competition with ryegrass was, in general, observed in the soybeans; the ryegrass biotypes, susceptible and resistant to glyphosate, coexisting with soybean have generally higher oxidative damage due to intraspecific competition; since when these biotypes coexist not present modifications of these parameters.

scholarly journals Competitiveness of alexandergrass or Bengal dayflower with soybean

2010 ◽  
Vol 28 (3) ◽  
pp. 515-522 ◽  
Author(s):  
A.C.R. Dias ◽  
S.J.P. Carvalho ◽  
L.W. Marcolini ◽  
M.S.C. Melo ◽  
P.J. Christoffoleti
Keyword(s):  
Competitive Ability ◽  
Dry Mass ◽  
Total Density ◽  
Weed Species ◽  
Replacement Series ◽  
Commelina Benghalensis ◽  
Randomized Design ◽  
Full Flowering ◽  
Completely Randomized Design ◽  
Soybean Plants

Weeds compete with field crops mainly for water, light and nutrients, and the degree of competition is affected by the weed density and the intrinsic competitive ability of each plant species in coexistence. The objective of this research was to compare the competitiveness of alexandergrass (Brachiaria plantaginea) or Bengal dayflower (Commelina benghalensis) in coexistence with soybean, cv. M-Soy 8045. A factorial experiment (2 x 5) with two weed species and five competition proportions was carried out in a completely randomized design with four replicates. Proportions were based on a replacement series competition design, always maintaining the total density of four plants per 10 L plastic pots, which corresponded to 60 plants m ². The weed-crop proportions were: 0:4; 1:3; 2:2; 3:1; 4:0; that corresponded to the proportion of 100, 75, 50, 25 and 0% of soybean plants and the opposite for weeds, B. plantaginea or C. benghalensis plants. Leaf area, shoot dry mass of the weeds and soybean and number of soybean trifoliate leaves were evaluated when the soybean reached the phenologic stage of full flowering. B. plantaginea was a better competitor than soybean plants. Otherwise, C. benghalensis revealed a similar competitive ability that of the soybean. In both cases, there were evidences that intraspecific competition was more important.

scholarly journals Does the resistance to glyphosate herbicide affect the competitive ability of ryegrass with soybean?

2014 ◽  
Vol 32 (1) ◽  
pp. 189-196 ◽  
Author(s):  
C. Oliveira ◽  
D. Agostinetto ◽  
L. Vargas ◽  
L.A. Ávila ◽  
C.P. Tarouco
Keyword(s):  
Statistical Analysis ◽  
Leaf Area ◽  
Intraspecific Competition ◽  
Competitive Ability ◽  
Dry Mass ◽  
Replacement Series ◽  
Soybean Crop ◽  
Randomized Design ◽  
Glyphosate Herbicide ◽  
Completely Randomized Design

The objective this work was to investigate the competitive ability between resistant and susceptible ryegrass biotypes and of these with soybean crop. Four experiments were carried under greenhouse, in a completely randomized design with four replications, in 2011 and 2012. Treatments were arranged in additive series and replacement series assay. In each series, the proportions among ryegrass resistant and susceptible plants related to soybean were: 100:0, 75:25, 50:50, 25:75 e 0:100. Leaf area and shoot dry mass were evaluated. Competitiveness statistical analysis consisted in applying diagrams to the replacement series and alternative interpretations of the competitiveness indexes. The soybean crop had equivalent competitiveness to the susceptible ryegrass biotype and inferior to the resistant biotype, while the biotypes, both susceptible and resistant to glyphosate, present equivalent competitive ability. In general, the intraspecific competition is more harmful to ryegrass when in competition with soybean, while interspecific competition is predominant for culture.

scholarly journals COMPETITIVE ABILITY OF CANOLA HYBRIDS WITH WEEDS

2015 ◽  
Vol 33 (3) ◽  
pp. 413-423 ◽  
Author(s):  
L. GALON ◽  
L. R. AGAZZI ◽  
L. VARGAS ◽  
F. NONEMACHER ◽  
F. J. M. BASSO ◽  
...  
Keyword(s):  
Leaf Area ◽  
Competitive Analysis ◽  
Raphanus Sativus ◽  
Competitive Ability ◽  
Lolium Multiflorum ◽  
Dry Mass ◽  
Replacement Series ◽  
Randomized Design ◽  
Competition Ability ◽  
Completely Randomized Design

ABSTRACTThe objective of the study was to assess the relative competitive ability of canola hybrids in the presence of turnip (Raphanus sativus) and ryegrass (Lolium multiflorum) in different ratios of plants in the mixture. The experiments were conducted in a greenhouse, in a completely randomized design with four replications. Treatments were arranged in ratios of canola against turnip or ryegrass: 100:0, 75:25, 50:50, 25:75 and 0:100. Competitive analysis of the species was accomplished by means of diagrams usually applied to replacement series and also by the relative competitiveness indices. Fifty days after the emergence of the species, measurements of leaf area and shoot dry mass were performed. There was a competition between canola hybrids and weeds, with reduction for all variables. There was a differential competitive ability among canola hybrids in the presence of turnip and/or ryegrass. Canola hybrid Hyola 433 was more competitive in the presence of turnip than Hyola 61, 76 and 571 CL. Hyola 61, 76, 433 and 571 CL do not differ in terms of competition ability when growing with ryegrass.

scholarly journals COMPETITIVE ABILITY OF WHEAT IN ASSOCIATION WITH BIOTYPES OF Raphanus raphanistrum L. RESISTANT AND SUSCEPTIBLE TO ALS-INHIBITOR HERBICIDES

2015 ◽  
Vol 39 (2) ◽  
pp. 121-130 ◽  
Author(s):  
Leandro Oliveira da Costa ◽  
Mauro Antônio Rizzardi
Keyword(s):  
Leaf Area ◽  
Dry Matter ◽  
Competitive Ability ◽  
Management Strategies ◽  
Raphanus Raphanistrum ◽  
Replacement Series ◽  
Herbicide Resistant ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Als Inhibitor

The occurrence of Raphanus raphanistrum ALS herbicide-resistant in wheat crops causes crop yield losses, which makes it necessary to understand the factors that influence the interference of this weed to develop safer management strategies. This study aimed to evaluate the competitive ability of wheat in coexistence with biotypes of R. raphanistrum that are resistant (R biotype) and susceptible (S biotypes) to ALS herbicides and to determine whether there are differences in the competitiveness of these biotypes. The experiments were conducted in a greenhouse using a completely randomized design with four replications. The treatments were placed in pots and arranged in replacement series for three experiments (1 - wheat with the R biotype; 2 - wheat with the S biotype; and 3 - the R biotype with the S biotype) at the following ratios: 100:0, 75:25, 50:50, 25:75, and 0:100. The competitiveness was analyzed through diagrams applied to replacement experiments and competitiveness indices, including the evaluation of the shoot dry matter of the plants (experiments 1, 2, and 3) and the leaf area (experiment 3). The R and S biotypes significantly decreased the shoot dry matter of the wheat cultivar and demonstrated superior competitive ability compared with the culture. The interspecific competition was more important for the wheat and for the S biotype. The competitiveness of the R biotype compared to the S biotype was similar, with synergism in the leaf area production, which indicates the predominant intraspecific competition exhibited by the R biotype.

scholarly journals Competitive ability of corn in coexistence with goosegrass

2013 ◽  
Vol 31 (2) ◽  
pp. 281-289 ◽  
Author(s):  
A.C.D. Wandscheer ◽  
M.A. Rizzardi ◽  
M. Reichert
Keyword(s):  
Plant Height ◽  
Competitive Ability ◽  
Dry Mass ◽  
Agricultural Systems ◽  
Weed Species ◽  
Replacement Series ◽  
Eleusine Indica ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Corn Plants

Competition between plants is one of the main interferences that occurs in agricultural systems and accounts for significant crop yield reductions. The aim of this study was to assess the competitive ability of corn in coexistence with the weed species Eleusine indica. The experiments were conducted in a greenhouse, in the growing season 2010/2011, and were arranged in a completely randomized design with four replications. The experimental units consisted of plastic pots with a volumetric capacity of 8 L. Treatments were arranged in a replacement series with five proportions of corn plants and weed: 100:0, 75:25, 50:50, 25:75, and 0:100, respectively, with a constant population of eight plants per pot, at the end of each treatment. The competitiveness analysis was conducted through diagrams applied to the replacement series experiment and competitiveness index, and the variables evaluated were root, shoot, and total dry mass, and plant height. When in equal proportions, corn showed competitive ability equivalent to goosegrass in relation to the variables shoot, root, and total dry mass. Goosegrass was more competitive than the crop in relation to plant height.

scholarly journals Competitive analysis of soybean and sudangrass using replacement series design

Revista CERES ◽  
2016 ◽  
Vol 63 (5) ◽  
pp. 668-675
Author(s):  
Mauro Antônio Rizzardi ◽  
Alana Cristina Dorneles Wandscheer ◽  
Andrea Ferreira Hoffmann
Keyword(s):  
Competitive Analysis ◽  
Dry Matter ◽  
Rio Grande ◽  
Agricultural Crops ◽  
Rio Grande Do Sul ◽  
Replacement Series ◽  
Series Design ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Agricultural Areas

ABSTRACT Competition is the best known form of direct interference of weeds on agricultural crops. However, there is relatively little information on the competition of the weed sudangrass on soybean, which has been common in agricultural areas in the southern of Rio Grande do Sul. The objective of this study was to evaluate the competition between sudangrass and soybeans using replacement series experiments. The experiment was carried out in a greenhouse in a completely randomized design with four replications. The treatments consisted of soybean and sudangrass associations. The experimental units were 8-L plastic pots, in the proportions 0: 8, 2: 6, 4: 4, 6: 2, 8: 0, corresponding to 0, 25, 50, 75 and 100% of the crop and weed respectively. Shoot, root and total dry matter and plant height were analyzed through diagrams applied to replacement series and competitive indices. Soybean showed competitive superiority in coexistence with sudangrass in relation to shoot, root and total dry matter. The intraspecific competition was more significant for the crop and inter-specific competition was more important for the weed.

Stability of Black Garlic Extract on Various pH and Temperature

2020 ◽  
Vol 7 (1) ◽  
pp. 17
Author(s):  
Putu Eka Yudhayanti ◽  
I Dewa Gde Mayun Permana ◽  
Komang Ayu Nocianitri
Keyword(s):  
Antioxidant Activity ◽  
Experimental Design ◽  
Garlic Extract ◽  
Total Flavonoid ◽  
Total Phenolic ◽  
Processing Temperature ◽  
Randomized Design ◽  
Two Factors ◽  
Completely Randomized Design ◽  
New Compounds

Black garlic is a garlic that experiences warming at a certain temperature and time to find higher antioxidant activity. This research aimed to know effect of antioxidant content’s stability of extract BG to pH and temperature. The experimental design used in this research was a completely randomized design with replication, which consisted of two factors. The first factor was pH (4, 6 and 8). The second factor was temperature (30, 50 and 70ºC). Data were analyzed with analysis of variance, followed by Duncan test. The results showed that pH and processing temperature very influential to antioxidant activity, total phenolic and total flavonoid. The results showed that the best treatment was pH 4 and temperature 30ºC which the best resulted antioxidant activity, total phenolic and total flavonoid that stablest. The resulted of antioxidant activity, stability of total phenolic and total flavonoid that were 75,13%, 42,47% and 77,71%. The treatment of pH and processing temperature change compounds of extract black garlic. Myricetin and quercetin appeared on treatment pH 4 with temperature 30ºC and pH 8 with temperature 70 ºC. The treatment of pH and processing temperature of black garlic extract reduced antioxidant activity, total phenol and total flavonoid. pH and temperature form new compounds.

scholarly journals Interference of Brassicaceae and Poaceae on Canola Hybrids

2019 ◽  
Vol 37 ◽  
Author(s):  
D.R.O. SILVA ◽  
A.C.M. AGUIAR ◽  
D.P. GHELLER ◽  
B.D. NOVELLO ◽  
C.J. BASSO
Keyword(s):  
Dry Matter ◽  
Competitive Ability ◽  
Shoot Growth ◽  
Weed Species ◽  
Orthogonal Contrasts ◽  
Light Interference ◽  
Randomized Design ◽  
Number Of Leaves ◽  
Hybrid Growth ◽  
Completely Randomized Design

ABSTRACT: The objective of this study was to evaluate the initial competitive ability of canola hybrids against Brassicaceae and Poaceae species in terms of root and shoot resources. Two experiments were conducted in greenhouse, in a completely randomized design with four replications. The treatments consisted of interference conditions by root + shoot interference (root+shoot) and shoot interference (Light); and Brassicaceae and Poaceae weeds competing with hybrid of canola (Hyola 61 and Diamond) with different traits for competitiveness. The plant height, root length, dry matter of shoot and root, number of leaves and leaf area were evaluated. Data were compared using orthogonal contrasts. The turnip and volunteer canola reduced root development of the Hyola 61 in root + shoot interference, and among the Brassicaceas weeds, turnip caused greater losses. Brassicaceas weeds caused largest reductions in Diamond’s hybrid growth compared to Poaceae, mainly under light interference. Brassicaceas and Poaceae weeds cause similar damage to Hyola 61 hybrid, and the injury is higher for root +shoot interference. The black oat induce shoot growth in the Diamond hybrid under shoot interference, while among the Brassicaceae weed species, there were no differences.

scholarly journals PENGARUH PENAMBAHAN HIGH FRUCTOSE SYRUP (HFS-55) TERHADAP KARAKTERISTIK RED WINE KELOPAK BUNGA ROSELA (Hibiscus sabdariffa L.)

2019 ◽  
Vol 8 (4) ◽  
pp. 390
Author(s):  
Anastasia Laksmi Pratiwi ◽  
Agus Selamet Duniaji ◽  
I Wayan Rai Widarta
Keyword(s):  
Red Wine ◽  
Reducing Sugar ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Ethanol Content ◽  
Randomized Design ◽  
High Fructose ◽  
Soluble Solid ◽  
Completely Randomized Design ◽  
High Fructose Syrup

This research was aimed to determine the effect of adding high fructose syrup (HFS-55) to red wine made from roselle flower petals that can produce roselle red wine with the best characteristics. This study used a Completely Randomized Design (RAL) with a treatment of adding HFS-55 10%, 15%, 20%, 25%, 30%. This treatment was repeated 3 times, resulting in 15 experimental units. The data were analyzed by ANOVA and followed by Duncan test. The results showed that the adding of HFS-55 on roselle red wine has a significant effect on ethanol content, pH, total soluble solid, total reducing sugar, aroma, taste and overall acceptance with the best treatment was obtained from the addition of 25% HFS-55 with roselle red wine characteristics containing 10.65% ethanol content, pH 3.6, total soluble solids 10.10% Brix, total reducing sugar 10.37%, total phenolic 3.08 mg/ml and total methanol was not found, and with the panelist preference for color usual, aroma rather like, taste rather like and overall acceptance rather like. Keyword: roselle, HFS-55, red wine

scholarly journals PENGARUH SUHU PENGERINGAN TERHADAP KANDUNGAN KOMPONEN BIOAKTIF DAN KARAKTERISTIK SENSORIS TEH WHITE PEONY

2019 ◽  
Vol 8 (1) ◽  
pp. 36
Author(s):  
Dewa Ayu Tri Ulandari ◽  
Komang Ayu Nocianitri ◽  
Ni Made Indri Hapsari Arihantana
Keyword(s):  
Antioxidant Activity ◽  
Temperature Treatment ◽  
Sensory Characteristics ◽  
Total Phenolic ◽  
Duncan Multiple Range Test ◽  
Drying Temperature ◽  
Randomized Design ◽  
Bioactive Component ◽  
Completely Randomized Design ◽  
Range Test

This study aims to determine the effect of drying temperature on the bioactive component contents of white peony tea and to know the proper drying temperature in white peony tea to produce the highest bioactive component contents and the best sensory characteristics. The experimental design used was Completely Randomized Design with a drying temperature as the treatment consisting of five levels: 60oC, 70oC, 80oC, 90oC, and 100oC. The treatment was repeated 3 times to obtain 15 experiment units. The data obtained were analyzed by variance and if the treatment had an effect on the observed variable then continued with The Duncan Multiple Range Test. The results showed that the 90oC drying temperature treatment produced white peony tea with the highest bioactive component contents and the best sensory characteristics with water content 4,06% (wet basis), yield 52,54%, total phenolic 211,01 mg GAE/g tea, flavonoid 10,90 mg CE/g tea, catechin 3,55 mg/g tea, antioxidant activity 50,20%, brew color yellow and liked, astringent taste and usual, aroma liked and overall acceptance rather liked.

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