Dynamics of Clomazone Formulations Under Different Applications Conditions

ABSTRACT: Maintenance of straw on the soil surface in sugarcane production areas can influence weed occurrence and herbicide dynamics. After application, considerable losses of clomazone can occur as a result of its physicochemical characteristics. For this reason, novel formulations have been developed. In addition to the conventional formulation, microencapsulated formulations are currently available. Thus, the aim of this study was to observe and compare the effect of clomazone formulations under different application conditions. For this purpose, the experiment was carried with 12 treatments in a completely randomized design, with four replications, using clomazone formulations (1,200 g a.i. ha-1), on soils with different moisture levels, in the presence and absence of sugarcane straw, followed or not by rainfall simulation. The treatments were compared by observation of number of emerged plants and phytotoxicity at 7 and 14 DAA, as well shoot dry matter at 14 DAA for Ipomoea nil, Urochloa decumbens and Panicum maximum. In general, the microencapsulated formulation presented a better performance under the less suitable application conditions when compared to the conventional one. However, for the other conditions, both formulations had a similar performance.

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Initial Development of Eucalyptus According to Different Desiccation Periods of Signalgrass

Planta Daninha ◽

10.1590/s0100-83582018360100020 ◽

2018 ◽

Vol 36 (0) ◽

Author(s):

Y. GRAAT ◽

A.L. BACHA ◽

M.P. NEPOMUCENO ◽

P.L.C.A. ALVES

Keyword(s):

Dry Matter ◽

Control Sample ◽

Experimental Period ◽

Initial Development ◽

Randomized Design ◽

Urochloa Decumbens ◽

Completely Randomized Design ◽

Red Latosol ◽

Eucalyptus Urograndis ◽

Herbicide Glyphosate

ABSTRACT: This study aimed at evaluating the effects of different desiccation periods of Urochloa decumbens on the initial development of Eucalyptus urograndis (clone C-219H). The experiment was conducted in 100 liter concrete boxes, previously filled with Dark-Red Latosol. U. decumbens was sown in all plots, except for the control sample without covering. After 95 days from sowing, the herbicide glyphosate (dose of 1,424 g a.e. ha-1) was sprayed at intervals of 0 (Apply-Plant), 7, 14, 21, 28 and 35 days before eucalyptus planting, plus a control sample without covering, totaling seven treatments. A completely randomized design with six replications was used. Eucalyptus plants were evaluated 30, 60 and 90 days after planting (DAP), when the height of the plants and the diameter of the stem were determined. At the end of the experimental period (90 DAP), the leaf area and the dry matter of leaves and stem were measured. It is possible to conclude that the Apply-Plant modality was harmful to some of the eucalyptus characteristics (E. urograndis - C-219H), while planting the seedlings in periods over 14 days after the desiccation of U. decumbens plants promoted a better development of the culture.

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The Allelopathic Effect of Eucalyptus Leaf Extract on Grass Forage Seed

Planta Daninha ◽

10.1590/0100-83582015000200004 ◽

2015 ◽

Vol 33 (2) ◽

pp. 193-201 ◽

Cited By ~ 8

Author(s):

F.P. Carvalho ◽

C.A.D. Melo ◽

M.S. Machado ◽

D.C.F.S. Dias ◽

E.M. Alvarenga

Keyword(s):

Leaf Extract ◽

Allelopathic Effect ◽

Panicum Maximum ◽

Allelopathic Potential ◽

Eucalyptus Leaves ◽

Randomized Design ◽

Urochloa Decumbens ◽

Completely Randomized Design ◽

Germination Vigor ◽

Eucalyptus Urograndis

This study aimed to evaluate the allelopathic effect of various concentrations of an aqueous extract of eucalyptus leaves on Urochloa decumbens and Panicum maximum seeds. The extract was prepared from Eucalyptus urograndis leaves that were milled and mixed with distilled water in a 1:9 milled leaves: water ratio to obtain an extract with a defined concentration of 100%. In addition, dilutions of 50%, 25% and 12.5% were prepared, and a 0% dilution was used as a control. The experiment followed a completely randomized design, with four replicates, each of 50 seeds of U. decumbens and 50 seeds of P. maximum, arranged on filter paper moistened with each concentration of extract in a Gerbox plastic box. The results demonstrated the allelopathic potential of E. urograndis aqueous extracts applied to the seeds of U. decumbens and P. maximum. The 50% and 100% concentrations of leaf extract most strongly inhibited the germination, vigor and seedling growth of U. decumbens and P. maximum. The germination speed index and the root length were the characteristics that were most affected by the potentially allelopathic substances contained in the eucalyptus extracts at all concentrations.

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PENGARUH PENGGUNAAN KONSENTRAT DALAM PAKAN RUMPUT BENGGALA (Panicum maximum ) TERHADAP KECERNAAN BAHAN KERING DAN BAHAN ORGANIK PADA KAMBING LOKAL

ZOOTEC ◽

10.35792/zot.34.0.2014.4798 ◽

2014 ◽

Vol 34 ◽

pp. 108

Author(s):

Jems Momot ◽

Kartini Maaruf ◽

M R Waani ◽

Ch J Pontoh

Keyword(s):

Organic Matter ◽

Key Words ◽

Dry Matter ◽

Panicum Maximum ◽

Randomized Design ◽

Guinea Grass ◽

Completely Randomized Design

A research was conducted to evaluate the effects of concentrate utilization in Guinea grass (Panicum maximum) ration on dry matter and organic matter digestibilities. Twelve male local goats were used in this experiment and located in individual pens. Completely Randomized Design (CRD) with four treatments and three replicates was used. The treatments were R1 = 100 % guinea grass, R2 = 75 % guinea grass + 25 % concentrate, , R3 = 50 % guinea grass + 50 % concentrate, and R2 = 25 % guinea grass + 75 % concentrate. The results showed that effects on dry matter and organic matter digestibilities were high significantly different among treatments (P < 0.01). Ration without concentrate was significantly lower compared to ration with concentrate;. It can be concluded that the best dry matter and organic matter digestibilities were on 75 % concentrate in the ration Key words : Guinea grass, concentrate, digestibility, dry matter, organic matter, and local goats

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Fitorremediation of contaminated soil with 2,4-D + picloram in Eastern Amazonia

Research Society and Development ◽

10.33448/rsd-v10i4.14372 ◽

2021 ◽

Vol 10 (4) ◽

pp. e59110414372

Author(s):

Jéssica Paloma Pinheiro da Silva ◽

Sandra Andréa Santos da Silva ◽

Douglas Pereira Ferreira ◽

Samia Cristina de Lima Lisboa ◽

Rainerio Meireles da Silva ◽

...

Keyword(s):

Contaminated Soil ◽

Raphanus Sativus ◽

Dry Matter ◽

Panicum Maximum ◽

Second Stage ◽

Randomized Design ◽

Dry Biomass ◽

Completely Randomized Design ◽

Urochloa Brizantha ◽

Two Stages

The objective of this work was to evaluate the potential of Urochloa brizantha cv. Marandu and Panicum maximum cv. Mombasa in phytoremediation of soil treated with 2,4-D + picloram herbicide, using Raphanus sativus Crimson Gigante as a bioindicator plant. The experiment was carried out in a greenhouse, in a completely randomized design in two stages. In the first stage the treatments were: cultivation of U. brizantha and P. maximum treated with and without the herbicide dose, with five replications. In the second stage, the treatments consisted of cultivating R. sativus in soil: free of herbicide residue; and soil contaminated with cultivation: prior to U. brizantha; P. maximum; and without previous cultivation of grass, with five replications. The units were treated with the herbicide, individually in pre-emergence, after 15 days the grasses were sown. After 50 days, forages were harvested and segregated in aerial and root parts, analyzing fresh and dry biomass (g) and height (cm). After removing phytoremediation plants, R. sativus was transplanted, evaluating visual phytotoxicity at 5, 10, 15 and 20 days after emergence (DAE) and at 20 DAE, the accumulation of green and dry matter (g), height (cm). The evaluated grasses have phytoremediation characteristics for auxinic herbicides; R. sativus can be used as a bioindicator of the herbicide 2,4-D + picloram; the evaluated period was not enough to fully remove the effects of the herbicide.

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Factors influencing the germination and emergence of tall windmill grass (Chloris polydactyla) and swollen fingergrass (Chloris barbata)

Australian Journal of Crop Science ◽

10.21475/ajcs.20.14.05.p2243 ◽

2020 ◽

pp. 795-801

Author(s):

Alfredo Junior Paiola Albrecht ◽

Arthur Arrobas Martins Barroso ◽

Henrique Fabrício Placido ◽

André Felipe Moreira Silva ◽

Leandro Paiola Albrecht ◽

...

Keyword(s):

Dry Matter ◽

Soil Cover ◽

Soil Depth ◽

Seedling Emergence ◽

Sugarcane Straw ◽

Randomized Design ◽

Light Effects ◽

Completely Randomized Design ◽

Chloris Barbata ◽

Determine Effect

This study characterized the germination of seeds of Chloris polydactyla (synonymy Chloris elata) and Chloris barbata at varying temperature, luminosity, soil texture and cover. The first experiment WAS conducted in laboratory to determine the temperature and light effects on germination of these species. The experimental design was a 2x7 factorial, where 2 represents the absence/presence of light and 7 temperatures 15, 20, 25, 30, 35, 40 and 45°C. The second experiment was conducted in greenhouse to determine effect of edaphic factors on seedling emergence, in a 3x6 factorial arrangement, consisting of 3 soil textures (sandy, medium and clayey) and 6 sowing depths (0, 1, 2, 4, 6 and 8 cm). The third experiment was conducted in greenhouse to determine soil cover effects and to evaluate the percentage reduction of dry matter of weeds, where the treatments were mulching with 0, 5, 10, 15 and 20 t ha-1 sugarcane straw. All experiments were conducted in completely randomized design, analyzed separately for each species. No seed was germinated under absence of light. Both species achieved better germination in medium textured soil. It was observed that the emergence of the species was low even without straw. Chloris showed better germination under higher temperatures of 30ºC and 35ºC, although exhibited a drastic decline in the emergence with the increase in soil depth or mulching with sugarcane straw. Greater germination of these weeds occurs in medium textured soils.

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Weed Control and Selectivity to Post-Applied Herbicides in Eucalyptus

Journal of Agricultural Science ◽

10.5539/jas.v9n10p67 ◽

2017 ◽

Vol 9 (10) ◽

pp. 67

Author(s):

Allan Lopes Bacha ◽

Mariluce Pascoina Nepomuceno ◽

Willians Cesar Carrega ◽

Pedro De Figueiredo Rocha Barbosa Martins ◽

Pedro Luis da Costa Aguiar Alves

Keyword(s):

Methyl Ester ◽

Weed Control ◽

Dry Matter ◽

Panicum Maximum ◽

Weed Species ◽

Visual Effects ◽

Initial Development ◽

Randomized Design ◽

Completely Randomized Design ◽

Urochloa Brizantha

The objective of this study was to evaluate the selectivity of fluazifop-p-butyl and haloxyfop-R methyl ester on Eucalyptus urograndis (clone GG100), as well as the use of fluazifop-p-butyl for control of Panicum maximum and Urochloa brizantha. Two experiments were conducted in 15-liter capacity pots, in a completely randomized design with four replications. The first experiment consisted of seven treatments, in which fluazifop-p-butyl and haloxyfop-R methyl ester were sprayed at 15, 30 and 37 days after planting (DAP) and a control plot without application. In the second experiment, the treatments consisted of a factorial 4 × 2 (four application periods and two weed species), in which three seedlings of P. maximum or U. brizantha were transplanted per pot. In both experiments, at 90 DAP, plant height, stem diameter, leaf area and total dry matter of eucalyptus were evaluated. In the second experiment, besides the morphological parameters, the percentage of weed control was evaluated. The data was submitted to analysis of variance by F test, and the means compared by Tukey test at the level of 5% of probability. Both herbicides did not cause visual effects of phytointoxication in eucalyptus, but haloxyfop-R methyl ester was not selective to clone GG100 (E. urograndis). Fluazifop-p-butyl was selective to clone GG100, providing better control in the first application period (15 DAP) but only for P. maximum, which negatively affected the initial development of eucalyptus, while U. brizantha was not efficiently controlled with the usage of fluazifop-p-butyl.

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Pengaruh Penambahan Molases Terhadap Komposisi Kimia Silase Beberapa Jenis Rumput Yang Ditanam Bercampur Dengan Stylos

Jurnal Agripet ◽

10.17969/agripet.v7i2.3210 ◽

2016 ◽

Vol 7 (2) ◽

pp. 21-28

Author(s):

M. Yunus

Keyword(s):

Analysis Of Variance ◽

Crude Protein ◽

Dry Matter ◽

Crude Fiber ◽

Panicum Maximum ◽

Randomized Design ◽

Completely Randomized Design

ABSTRACT. This study was conducted in UPTD (Unit Pelaksana Tugas Dinas) Saree Aceh Besar about 4 weeks. The matter of this study are 4 kinds of grass there are rumput benggala (panicum maximum) rumput BD (Brachiaria decumbent). The grass that use in this study ditanam mixe with stylosanthes guyanesis legume, while the additive in silage is molasses. The study was designed into Completely Randomized Design (CDR) Factorial 4x3. There were 3 replications. First factor was R1 (Rumput Benggala + Stylosanthes guyanesis), R2 (Rumput lampung+Stylosanthes guyanesis), R3 (Rumput BD + Stylosanthes guyanesis), R4 (Rumput Star grass + Stylosanthes guyanesis) and the second factor were 3 level there were M1 (0%0,M2(3%) dan M3 (5%). Invetigated variabes included pH, Dry matter, crude protein, crude fiber, ash and water containet..The data were analyzed by an analysis of variance and as a significant effect was detected, the analysis was contained by Uji Beda Nyata Terkecil (BNT), Steel and Torrie (1991). The result of this study showed that the different of several grass have hight significantly (P,0.010 of dry matter, crude protein, ash and water containing but have no significantly on pH and crude fiber silage. The diferent among molasses have significantly on pH, crude protein and crude fiber silage. From BNT test showed that molasses increased dry matter and crude protein of silage compared to no molasses added. However, th used of molasses decreased crude fiber and water contain compared to no molasses added. The quality of silage found at level of 5.5% molasses especially on star grass (R4M3). The study concluded that using different level molasses es on several grass producted better silage than without molasses.

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IDENTIFICATION OF IDEOTYPES BY CANONICAL ANALYSIS IN Panicum maximum

Ciência e Agrotecnologia ◽

10.1590/s1413-70542015000200006 ◽

2015 ◽

Vol 39 (2) ◽

pp. 147-153 ◽

Cited By ~ 3

Author(s):

Janaina Azevedo Martuscello ◽

Thiago Gomes dos Santos Braz ◽

Liana Jank ◽

Daniel de Noronha Figueiredo Vieira da Cunha ◽

Ana Luiza Silva Carvalho

Keyword(s):

Dry Matter ◽

Canonical Analysis ◽

Panicum Maximum ◽

Residual Variance ◽

Volumetric Density ◽

Canonical Variables ◽

Randomized Design ◽

Leaf Yield ◽

Completely Randomized Design ◽

Data Variation

Grouping of genotypes by canonical variable analysis is an important tool in breeding. It allows the grouping of individuals with similar characteristics that are associated with superior agronomic performance and may indicate the ideal profile of a plant for the region. The objective of the present study was to define, by canonical analysis, the agronomic profile of Panicum maximum plants adapted to the Agreste region. The experiment was conducted in a completely randomized design with 28 treatments, 22 genotypes of Panicum maximum, and cultivars Mombasa, Tanzania, Massai, Milenio, BRS Zuri, and BRS Tamani in triplicate in 4-m² plots. Plots were harvested five times and the following traits were evaluated: plant height; total, leaf, and stem; dead dry matter yields; leaf:stem ratio; leaf percentage; and volumetric density of forage. The analysis of canonical variables was performed based on the phenotypic means of the evaluated traits and on the residual variance and covariance matrix. Genotype PM34 showed higher mean leaf dry matter yield under the conditions of the Agreste of Alagoas (on average 53% higher than cultivars Mombasa, Tanzania, Milenio and Massai). It was possible to summarize the variation observed in eight agronomic characteristics in only two canonical variables accounting for 81.44 % of the data variation. The ideotype plant adapted to the conditions of the Agreste should be tall and present high leaf yield, leaf percentage, and leaf:stem ratio, and intermediate values of volumetric density of forage.

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MORPHOPHYSIOLOGICAL RESPONSES OF COWPEA GENOTYPES TO IRRIGATION WATER SALINITY

Revista Caatinga ◽

10.1590/1983-21252017v30n421rc ◽

2017 ◽

Vol 30 (4) ◽

pp. 1001-1008

Author(s):

JOÃO PEDRO ALVES DE AQUINO ◽

ANTÔNIO AÉCIO DE CARVALHO BEZERRA ◽

FRANCISCO DE ALCÂNTARA NETO ◽

CARLOS JOSÉ GONCALVES DE SOUZA LIMA ◽

RAYLSON RODRIGUES DE SOUSA

Keyword(s):

Irrigation Water ◽

Dry Matter ◽

Arid Regions ◽

Stem Diameter ◽

Water Salinity ◽

Productive Capacity ◽

Randomized Design ◽

Irrigation Water Salinity ◽

Water Salt ◽

Completely Randomized Design

ABSTRACT Cowpea is broadly cultivated worldwide, especially in semi-arid or arid regions where soil or irrigation water salt contents can negatively influence the species’ productive capacity. The objective of this study was to evaluate the morphophysiological responses of cowpea genotypes to irrigation water salinity. The experiment was conducted in a greenhouse, under a completely randomized design with nine replications and in a 5x3 factorial scheme. Treatments consisted of five levels of irrigation water electrical conductivity - EC (EC0: 0.55; EC1: 1.60; EC2: 3.20; EC3: 4.80 and EC4: 6.40 dS m-1), applied from the 15th day after sowing (DAS), and three cowpea genotypes (G1: BRS Imponente; G2: MNC04-795F-168 and G3: MNC04-795F-159). EC increases at 35 DAS promoted stem diameter reductions of 8.0% (G1), 11.4% (G2), and 7.7% (G3), indicating different resistance to salinity by each genotype. Leaf area reductions at 25 and 38 DAS were 30.9% and 38.8% for EC0 and EC4, respectively. The BRS Imponente cultivar presented a performance superior to those of G2 and G3 in relation to stem diameter and stem dry matter at 25 DAS, and root-shoot and root-leaf ratios at 38 DAS.

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Competitive analysis of soybean and sudangrass using replacement series design

Revista CERES ◽

10.1590/0034-737x201663050011 ◽

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.

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