scholarly journals Glyphosate, isolated or in associations, at agronomic performance and seed quality of the RR®2 soybean

2018 ◽  
Vol 85 (0) ◽  
Author(s):  
André Felipe Moreira Silva ◽  
Alfredo Junior Paiola Albrecht ◽  
Henrique Rodrigues Milagres Viana ◽  
Bruno Flaibam Giovanelli ◽  
Giovani Apolari Ghirardello ◽  
...  
Keyword(s):  
Seed Quality ◽  
Soybean Cultivar ◽  
Agronomic Performance ◽  
Growing Seasons ◽  
Epsps Gene ◽  
Randomized Design ◽  
Application Analysis ◽  
Glyphosate Herbicide ◽  
Gene Information

ABSTRACT: The “second generation” of glyphosate-tolerant soybean (RR®2 soybean) was developed through a different technique of insertion of the glyphosate-insensitive EPSPs gene. Information on the selectivity of glyphosate, alone or in combination, in RR2 soybean is lacking. This study evaluated the effects of glyphosate, isolated or in associations, applied at post-emergence (V4), at agronomic performance and seed quality of soybean cultivar NS 6700 IPRO (RR2). The experimental design was randomized block with four replications and seven treatments, conducted in the field for two growing seasons. The treatments consisted of glyphosate herbicide, alone or in combination with clethodim, cloransulam, chlorimuron, lactofen and fluazifop, besides the control without application. Analysis was performed for crop injury, Soil and Plant Analyzer Development (SPAD) index, as well as variables related to agronomic performance (height, number of pods per plant, yield and 1,000-seed weight) and seed quality (vigor, germination, abnormal seedlings and dead seeds). An additional test was conducted with the same cultivar and treatments in a greenhouse in a completely randomized design with four replications. The herbicides did not affect agronomic performance and seed quality of RR2 soybean. Thus, the soybean cultivar NS 6700 IPRO (RR2) was tolerant to glyphosate, alone or combined with other herbicides applied in post-emergence (V4).

scholarly journals CNSL Concentration and Natural Dyes Effects in Formulation of Botanical Pesticide on Sitophilus zeamais and Maize Seed Quality

2020 ◽  
Vol 4 (1) ◽  
pp. 1-9
Author(s):  
Dian Astriani ◽  
Wafit Dinarto ◽  
Aji Jatmiko
Keyword(s):  
Seed Quality ◽  
Sitophilus Zeamais ◽  
Natural Dyes ◽  
Maize Weevil ◽  
Maize Seeds ◽  
Botanical Pesticide ◽  
Randomized Design ◽  
Efficiency And Effectiveness ◽  
Push Down

Maize is an important commodity in Indonesia and is vulnerable to maize weevil (Sitophilus zeamais) during storage which can cause a 100% yield loss. Chasew Nut Shell Liquid (CNSL) is a botanical pesticide able to control S. zeamais. Increasing CNSL efficiency and effectiveness requires additional adjuvants, such as solvents and dyes. Natural dyes addition is intended to provide seed markers. This study aimed to determine the best CNSL and natural dye formulation to control maize weevil and maintain maize seeds quality during storage. The research was conducted from August to October 2018 at the Agronomy Laboratory, Faculty of Agroindustry, Yogyakarta Mercu Buana University. The research was a single factor consisted of seven treatments with four replications arranged in a completely randomized design (CRD). Treatments were combinations of CNSL concentrations with the addition of natural dyes from suji leaf and teak leaves with one untreated control. The results of the research showed that CNSL as a seed treatment botanical pesticide could cause mortality and suppress S. zeamais populations and maintain the quality of maize seeds during storage for 12 weeks. Treatments with 20% CNSL formulation concentration and the addition of natural dyes both leaf pleomele or teak leaves could cause higher mortality and push down more populations and also could better maintain seed quality than 10 and 0% CNSL formulation concentrations.

scholarly journals Physiological maturity and drying speed in the quality of zucchini ( Cucurbita pepo L.) seeds

2017 ◽  
Vol 39 (2) ◽  
pp. 142-149
Author(s):  
Hellismar Wakson da Silva ◽  
João Almir Oliveira ◽  
Lucinda Helena Fragoso Monfort ◽  
Jodson Moraes dos Santos ◽  
Ana Clara Reis Trancoso ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Seed Mass ◽  
Accelerated Aging ◽  
Maturity Stage ◽  
Physiological Maturity ◽  
Randomized Design ◽  
Maturation Stages ◽  
Seed Health Test

Abstract: Harvesting and drying are essential procedures to obtain high quality seeds as well as for their conservation during storage. The goal of this research was to identify the physiological maturity stage and to verify the effect of drying speeds on the quality of zucchini seeds. A completely randomized design in a 3x2x2 factor scheme was used, involving three fruit maturation stages (49, 56 and 63 days after anthesis - DAA), two drying speeds (slow and quick) and two storage periods (0 and 6 months). Seed quality was evaluated by germination, first count, accelerated aging, electrical conductivity, tetrazolium, seedling emergence, emergence speed index and seed health test. Moisture content, thousand seed mass and percentage full seeds were also evaluated. Zucchini seeds reach maximum quality at 49 DAA. Slow or quick drying and storage do not affect the physiological quality of seeds that were harvested at 49 DAA. The delayed harvest of fruits reduces the quality of seeds. Quick drying reduces the incidence of the fungi Alternaria, Cladosporium, Phoma and Fusarium, and increases the occurrence of Aspergillus and Penicillium.

scholarly journals Physiological, isozyme changes and image analysis of popcorn seeds submitted to low temperatures

2017 ◽  
Vol 39 (3) ◽  
pp. 234-243 ◽  
Author(s):  
Hugo César Rodrigues Moreira Catão ◽  
Franciele Caixeta
Keyword(s):  
Low Temperatures ◽  
Seed Quality ◽  
Dry Mass ◽  
Enzyme Expression ◽  
Randomized Design ◽  
Radicle Protrusion ◽  
Negative Effect ◽  
Physiological Quality ◽  
Completely Randomized Design

Abstract: This present study aimed to assess seed quality of popcorn seedlings subjected to low temperatures by examining their physiological changes, enzymes, and images. We used a completely randomized design with four replications in a factorial arrangement with four hybrids (P618, AP6002, AP8202, AP8203) and five temperatures (10, 13, 16, 19 and 25 °C). Their physiological quality was assessed through radicle protrusion, germination, dry mass of seedlings and emergence. We have assessed the images of seedlings through their hypocotyl and root lengths; and through rates of automatic force, uniformity and growth, provided by Groundeye. The isozyme expressions were determined for the catalase (CAT - IUBMB: EC 1.11.1.6), alcohol dehydrogenase (ADH - IUBMB: EC 1.1.1.1), malate dehydrogenase (MDH - IUBMB: EC: 1.1.1.37) and α-amylase (α-AMY - IUBMB: EC 3.2.1.1). Results show that low temperatures cause a negative effect on seed physiological quality in enzyme expression of CAT, ADH, MDH and α-AMY and on the performance of seedlings. These alterations compromise seed quality. Hybrids AP6002 and AP8203 should be recommended for sowing at up to 16 °C. The Groundeye software was efficient in the analysis of popcorn seedlings and in for the assessment of seed quality when submitted to low temperatures.

scholarly journals Seed quality of rice cultivars stored in different environments

2014 ◽  
Vol 36 (1) ◽  
pp. 32-39 ◽  
Author(s):  
Elizabeth Rosemeire Marques ◽  
Eduardo Fontes Araújo ◽  
Roberto Fontes Araújo ◽  
Sebastião Martins Filho ◽  
Plínio César Soares
Keyword(s):  
Seed Quality ◽  
Accelerated Aging ◽  
Storage Period ◽  
Rice Cultivars ◽  
Germination Test ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
And Storage

The objective of this study was to evaluate dormancy and physiological quality of seeds of rice cultivars during storage in different environments. After harvesting, the seeds of three rice cultivars (Seleta, Curinga and Relâmpago) were dried in the sun, to reach moisture content at around 13%. Then, they were packed in paper and stored in four environments: 5 ± 2 ºC / 70 ± 5% RH, 12 ± 2 ºC / 70 ± 5% RH, 18 ± 2 ºC / 65 ± 5% RH and in uncontrolled condition of temperature and relative humidity (natural). Physiological quality was evaluated at the beginning and at 3, 6, 9 and 12 months of storage by germination test, electrical conductivity, accelerated aging and sand emergence. The experiment was conducted in split plots in a completely randomized design with three replications. Environmental factor was applied in the plots, cultivars in the subplots and storage period in subplots. Cultivar Seleta showed higher dormancy, which was surpassed during storage regardless of environment conservation. In general, seeds stored in natural environment showed lower physiological quality. Only the seeds of cultivar Seleta, regardless of the environment, maintained germination above the minimum required for commercialization until six months of storage.

scholarly journals Seed quality response of Urochloa humidicola cv. Llanero to drying surfaces and environments1

2018 ◽  
Vol 48 (3) ◽  
pp. 306-315
Author(s):  
Alan Mario Zuffo ◽  
Joacir Mario Zuffo Júnior ◽  
Everton Vinicius Zambiazzi ◽  
Fábio Steiner
Keyword(s):  
Seed Quality ◽  
Germination Rate ◽  
Seed Storage ◽  
Brachiaria Humidicola ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Quality Response ◽  
And Storage

ABSTRACT The drying process and storage may interfere in the quality of creeping signalgrass seeds [Urochloa humidicola (Rendle.) Morrone & Zuloago, syn. Brachiaria humidicola (Rendle.) Schweick.]. This study aimed to evaluate the physical, physiological and sanitary quality of creeping signalgrass cv. Llanero seeds submitted to drying surfaces and environments and stored for two periods (1 and 8 months). The experiment was arranged in a completely randomized design, in a 4 × 2 × 2 + 2 factorial arrangement, with four drying surfaces (soil, asphalt, concrete and ceramic floor), two drying environments (seeds exposed to the sun or shade), two seed storage periods (1 and 8 months) and two additional treatments with drying in paper bags under laboratory conditions (control) and stored for 1 or 8 months, with four replicates. The water content, viability by the tetrazolium test, electrical conductivity, germination rate, germination rate index and seed sanitary quality were measured. Drying at full sun impaired the physiological quality of the seeds due to the high temperatures (46.8-51.0 ºC) of the drying surface; however, reduced the incidence of pathogens. The drying of seeds in paper bags under shade results in a higher physiological quality, but the sanitary quality is compromised. However, the pathogens present in the seeds did not inhibit their viability and vigor. The storage for eight months reduces the seed quality.

scholarly journals Combined Effects of Biological and Chemical Treatment on Rice Seed Physiological and Sanitary Quality

2019 ◽  
Vol 11 (15) ◽  
pp. 106
Author(s):  
Alana Emanoele Pereira ◽  
Weliton Lucas da Silva Benites ◽  
Luana de Carvalho Catelan ◽  
Ana Paula Silva ◽  
Nadia Graciele Krohn
Keyword(s):  
Seed Quality ◽  
Dry Weight ◽  
Seed Vigor ◽  
Rice Seed ◽  
Water Control ◽  
Randomized Design ◽  
Seed Health ◽  
Physiological Quality ◽  
Rice Seeds

This study aimed to evaluate the efficiency of integrated biological and chemical control of pathogens in rice seeds and their effects on seed quality. The experiment was conducted in a 2 × 5 factorial completely randomized design. Fungicide-treated (carboxin/thiram) and untreated rice seeds were inoculated with distilled water (control), Azospirillum brasilense, Bacillus subtilis, Pseudomonas fluorescens, or Trichoderma harzianum. Seed vigor and viability, shoot and root length, and seedling dry weight were determined. The blotter test was carried out to assess seed health. Fungicide treatment improved seed vigor and viability and reduced the incidence of fungi. Biological treatment did not enhance the physiological quality of seeds but was able to control fungi. A. brasilense, B. subtilis, P. fluorescens, and T. harzianum controlled Phoma sorghina; B. subtilis, P. fluorescens, and T. harzianum were effective against Aspergillus flavus; P. fluorescens and T. harzianum controlled Pyricularia oryzae; and T. harzianum was effective against Gerlachia oryzae.

scholarly journals Sanitary quality of soybean seeds treated with fungicides and insecticides before and after storage

2019 ◽  
Vol 41 (3) ◽  
pp. 293-300
Author(s):  
Thaís Francielle Ferreira ◽  
Marcos Vinicios Carvalho ◽  
Valquíria de Fátima Ferreira ◽  
Denilson Paulo da Rosa Mavaieie ◽  
Gabriel Castanheira Guimarães ◽  
...  
Keyword(s):  
Seed Treatment ◽  
Seed Quality ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Insecticide Treatment ◽  
Randomized Design ◽  
Before And After ◽  
Completely Randomized Design ◽  
Penicillium Spp

Abstract: Fungi are considered as the most important among pathogens due to the higher number of species and to the damage caused both in yield and in seed quality. Thus, aimed to verify the effect of fungicide and insecticide treatment on sanitary quality and physiological performance of soybean seeds before and after storage. Seeds from cultivars NS 7494, NS 8693 and NS 7338 IPRO were used, which were analyzed separately by a completely randomized design in a 3 x 6 factorial design, being three chemical treatment applications: 1) treated and evaluated; 2) treated, stored and evaluated; 3) stored, treated and evaluated; and six mixtures of fungicides and insecticides: (Imidacloprido + Tiocarbe) + (Carbendazim + Tiram), (Imidacloprido + Tiocarbe) + (Metalaxil-M + Fludioxonil), Thiamethoxam + (Carbendazim + Tiram), Thiamethoxam + (Metalaxil-M + Fludioxonil), (Fipronil + Piraclostrobina + Metil-tiofanato) and the control, which was added only water. The healthy test, germination, cold and accelerated aging tests were evaluated. Seed treatment products require at least two months to be effective in controlling Penicillium spp. and Fusarium spp. The mixtures containing Carbendazim + Tiram in its composition are efficient in the control of pathogens regardless of the application time of products.

Metabolic changes, agronomic performance, and quality of seeds in soybean with the pat gene after application of glufosinate

Weed Science ◽  
2020 ◽  
Vol 68 (6) ◽  
pp. 594-604
Author(s):  
Alfredo Junior P. Albrecht ◽  
Ivana Paula F. S. de Brito ◽  
Leandro P. Albrecht ◽  
André Felipe M. Silva ◽  
Ana Karollyna A. de Matos ◽  
...  
Keyword(s):  
Seed Quality ◽  
Ammonia Concentration ◽  
Metabolic Changes ◽  
Agronomic Performance ◽  
Pat Gene ◽  
Performance Quality ◽  
Negative Effect ◽  
Initial Injury ◽  
Soybean Plants

AbstractThe transgenic Liberty Link® (LL) soybean is tolerant to glufosinate, conferred by the enzyme phosphinothricin acetyltransferase (PAT), which is encoded by the pat gene from Streptomyces viridochromogenes. Because symptoms of injury can be observed in soybean [Glycine max (L.) Merr.] plants in some situations, this study evaluated the effects of rates of glufosinate on agronomic performance; quality of LL soybean seeds; and the ammonia, glufosinate, and N-acetyl-l-glufosinate concentration (NAG) in soybeans with and without the pat gene after application of increasing glufosinate rates. Field and greenhouse experiments were conducted; the first evaluated the selectivity of glufosinate in LL soybeans, and the second evaluated the metabolic changes in soybeans with (LL) and without (RR2) the pat gene, after application of glufosinate. For fieldwork, application of glufosinate at rates up to four times the maximum recommended caused initial injury symptoms (up to 38.5%) in LL soybean plants. However, no negative effect was found on seed quality and agronomic performance of LL plants, including yield. This shows the selectivity of glufosinate promoted by pat gene insertion for application in POST (V4), in LL soybean. For the greenhouse experiment, it was concluded that the LL soybean plants presented high glufosinate metabolism, lower ammonia concentration, and no reduction in dry matter, in comparison with RR2 soybean, after application of high rates of glufosinate.

scholarly journals Effect of polyethylene glycol 6000 and storage period on seed quality of cocoa (Theobroma cacao L.)

2014 ◽  
Vol 30 (1) ◽  
Author(s):  
Astiti Rahayu ◽  
Triani Hardiyati ◽  
Ponendi Hidayat
Keyword(s):  
Seed Germination ◽  
Seed Quality ◽  
Storage Period ◽  
Seed Storage ◽  
Peg 6000 ◽  
Randomized Design ◽  
Long Time ◽  
Physiological Quality ◽  
And Storage

Increased productivity of cocoa needs high quality of cocoa seeds which are generally provided by certified seed gardens located far from smallholders farm, where seed delivery takes long time and may reduce physiological quality of seeds. One effort to maintain the seed quality is by treatment the seeds with polyethylene glycol6000 (PEG 6000). This study was aimed to study the interaction of PEG 6000 concentration and storage period on cocoa seed quality, and to determine the best concentration of PEG 6000 and storage period to maintain cocoa seed quality. The research was conducted in seed storage room, seed laboratory and green houseof PPPPTK, Cianjur. The experimental design used was a factorial completely randomized design and each combination treatment repeated three times. The first factor was concentration of PEG 6000 of 0%, 20%, 40%, and 60%, and the second factor was the storage period of 3 weeks, 6 weeks, 9 weeks, and 12 weeks. The results showed that concentration of PEG 60% with three weeks storage period was able to minimize the number of moldy seeds. The concentration of PEG 20%, 40%, and 60% were able to prevent seed germination in storage until six weeks. Concentration of PEG 6000 20% was able to maintain moisture content, seed germination, and germination rate.Key words:cocoa seed, storage, recalcitrant, PEG

scholarly journals Does the substrate affect the germination of soybean seeds treated with phytosanitary products?

2020 ◽  
Vol 44 ◽  
Author(s):  
Debora Kelli Rocha ◽  
Everson Reis Carvalho ◽  
Raquel Maria de Oliveira Pires ◽  
Heloisa Oliveira dos Santos ◽  
Amanda Carvalho Penido ◽  
...  
Keyword(s):  
Seed Quality ◽  
Soybean Seeds ◽  
Water Restriction ◽  
Seed Treatments ◽  
Randomized Design ◽  
Physiological Quality ◽  
Seedling Germination ◽  
Germination Experiment ◽  
Phytosanitary Products

ABSTRACT The use of an appropriate method that accurately expresses physiological seed quality and minimizes possible phytotoxicity by chemical products in laboratory testing with soybean seeds is relevant. The objective of this work was to evaluate the influence and infer the method adequacy for the representative evaluation of physiological quality of soybean seeds treated with phytosanitary products. Two experiments were carried out in a completely randomized design, with trial 1 in a 9×5 factorial scheme involving nine seed treatments, including fungicides and insecticides, and solutions with five osmotic potentials (0, -0.25, -0.5, -0.75 and -1.0 MPa) for wetting a paper substrate in a germination experiment, with evaluation of the normal seedlings at five and eight days after sowing. The second experiment consisted of a 9×7 factorial, with nine seed treatments and seven methods for germination evaluation at 5 days (between paper - BP, between sand - BS, between paper with water restriction - BPWR, between paper with preconditioning - BPC, sand between paper - SBP and vermiculite between paper - VBP). Treatments with insecticides affect seedling germination and evaluation, with greater phytotoxicity in relation to fungicides. Methods with readily available water led to greater phytotoxicity than methods with low water availability. For soybean germination evaluation of seeds treated with phytosanitary products, the BPC, SBP and VBP methods were optimal.

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