Physiological quality and economic evaluation of treated cowpea seeds stored in different packaging

The objective of this work was to evaluate the physiological quality of cowpea seeds and the economic viability of storage in different types of packaging and with different chemical treatments. Seeds were submitted to one of the following chemical treatments of active ingredients: fipronil; fipronil + pyraclostrobin + thiophanate methyl; and fludioxonil + metalaxyl. Seeds without chemical treatment constituted the control. Seeds were placed in permeable cotton bags, permeable raffia bags, semipermeable kraft paper bags, and impermeable PET bottles. The following were evaluated: seed moisture content; germination test; first germination count; germination speed index; hypocotyl length; root length and hypocotyl dry mass and root dry mass. Cost analysis of treatments was also performed. The physiological quality of cowpea seeds was more markedly reduced under storage conditions in permeable packages with fludioxonil + metalaxyl treatment. Impermeable packaging without chemical treatment decreased deterioration of physiological quality in cowpea seeds and is economically viable for a storage period of up to 90 days.

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Storage of soybean seeds treated with chemicals

Semina Ciências Agrárias ◽

10.5433/1679-0359.2019v40n6supl2p2961 ◽

2019 ◽

Vol 40 (6Supl2) ◽

pp. 2961

Author(s):

Isneider Luiz Silva ◽

Fernando Ribeiro Teles de Camargo ◽

Raniele Tadeu Guimarães de Souza ◽

Itamar Rosa Teixeira ◽

Hamilton Kikuti

Keyword(s):

Chemical Treatment ◽

Accelerated Aging ◽

Storage Period ◽

Dry Mass ◽

Soybean Seeds ◽

Soybean Cultivars ◽

Randomized Design ◽

Seedling Length ◽

Physiological Quality

To treat seed lots during the beneficiation process industrial seed treatment (TIS) has been used on seedlings. However, the actual TIS influence on the physiological quality of soybeans throughout storage is not yet known. The objective of this work was to evaluate the effects of TIS on the physiological quality of seeds of soybean cultivars during storage. Three soybean cultivars (M7110 IPRO, RR-8473RSF, M7739 IPRO) were subjected to four chemical treatment combinations (TIC-treated fungicide / insecticide): T1 - control; T2 - fungicide (Derosal Plus® - 200mL); T3 - insecticide (Cruiser ® - 500mL); T4 - a mixture of fungicide and insecticide products metalaxyl + thiabendazole + fludioxonil (MaximAdvanced - 200 mL) and thiamethoxam insecticide (Cruiser 350 FS - 500 mL). The samples were stored for a total of six months, with evaluation before storage and monthly throughout the storage period (0, 30, 60, 90, 120, 150 and 180 days). The seeds were stored in a cold chamber regulated at 12 ± 2 ºC and a relative humidity of 45± 2%. In addition to determining the water content, the following germination and vigor tests were performed: first count, seedling length, seedling dry mass and accelerated aging. A completely randomized design was used, in a 3 x 4 x 7 factorial scheme, with four replications. The data were initiallysubjected to analysis of variance, and later discriminated by the Tukey test (p < 0.05) (cultivars and chemical products) and regression (storage period). The work concludes that the use of insecticide favored the length of seedlings in cultivar RR-8473 RSF. Chemicals affected the quality and vigor of seeds in all studied cultivars. Soybean seeds can be stored with chemical treatment for commercial purposes for up to 60 days.

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Application of Trichoderma harzianum on the physiological quality of cowpea seeds

Australian Journal of Crop Science ◽

10.21475/ajcs.21.15.05.p2865 ◽

2021 ◽

pp. 643-648

Author(s):

Marcelo Laranjeira Pimentel ◽

Henara Valéria Miranda Castro ◽

Mike Kirixi Munduruku ◽

Larissa Conceição Cunha Ponte ◽

Deyvielen Maria Ramos Alves ◽

...

Keyword(s):

Trichoderma Harzianum ◽

Seed Treatment ◽

Germination Percentage ◽

Hypocotyl Length ◽

Cowpea Seeds ◽

Randomized Design ◽

Germination Speed ◽

Physiological Quality ◽

Set Up

The use of fungi in seed treatment can improve the plant's physiological characteristics. The aim of this study was to evaluate the influence of the use of Trichoderma harzianum on the physiological quality of bean seeds. The experiment was set up and conducted in the forest seed laboratory of the Federal University of Western Para, in a randomized design, using 4 procedures on the basis of a colony forming unit (CFU): T1 (0 CFU), T2 (4 x 109 CFU), T3 (8 x 109 CFU) and T4 (12 x 109 CFU), with 5 repetitions. Germination percentage (G%), germination speed index (GSI), hypocotyl length (HL) and radicle length (RL) were evaluated as variables. The data were analyzed by variance analysis and the averages were compared using the Tukey test (p≤0.05), in addition to the regression analysis, using the Minitab© version 18 statistical software. There were differences between the germination percentage tests, in which T2 obtained 100% of germinated seeds, for GSI it was observed that T2 and T3 were equal and superior to the other treatments, while for RL T1 and T2 obtained the best results, however, for HL there were no statistical differences between treatments. T2 was more efficient in the physiological quality of seeds to germination percentage and germination speed index

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Late harvest and chemical treatment of cowpea seeds

Colloquium Agrariae ◽

10.5747/ca.2021.v17.n1.a417 ◽

2021 ◽

Vol 17 (1) ◽

pp. 25-35

Author(s):

Mariana Zampar Toledo ◽

Daniel Junior Bilck ◽

Cleiton Banhara Machado

Keyword(s):

Seed Coat ◽

Chemical Treatment ◽

Seed Quality ◽

Fungicide Treatment ◽

Cowpea Seeds ◽

Seed Moisture ◽

Seedling Length ◽

Physiological Quality ◽

Physiological Tests

Reduced quality ofcowpea due to late harvest and therefore pathogen incidence may influence the results of the germination test, whenever losses are associated with the agentsadhered to seed coat;in that context, chemical treatmentof seeds during the evaluations may reflect more accurately physiological quality of the samples, which in turn may assurethe emergence results of healthy seedlings and establishment of appropriate plant populations inthe field. This study had the objective ofevaluating the effects of fungicide treatment on minimizing physiological quality losses of cowpea seedsdue to lateharvestin germination and seedling development tests. The experimental design was the completely randomized with four replications. Treatments consisted of cowpea, cultivar BRS Guariba, harvested at different times (0, 3, 6, 9, 12 and 15 days after physiological maturity)andtreated or not with fungicide carboxim+thiramfor seed quality tests. Seeds were initially characterized by seed moisture and mass. Afterwards, sampleswere evaluated by tests ofgermination percentage, germination first count, seedling length and dry matter. Data was submitted to variance analysisand means were analyzed as a 2x6 factorial. Means from chemical treatment and harvest times were compared by the Tukey test and regression analysis (p≤0.05), respectively, with subsequent unfolding of any significant interactions. Delayed harvest of cowpea seeds sharply reduces germination and vigor; fungicide treatment before performing physiological tests enables to establish thatseed quality losses can bein part caused by pathogen vehiculationonthe seed coat.

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Mechanical Damages and Chemical Treatments in the Quality of Maize Seeds Stored

Journal of Agricultural Science ◽

10.5539/jas.v11n3p482 ◽

2019 ◽

Vol 11 (3) ◽

pp. 482

Author(s):

Bárbara Gomes Ribeiro ◽

Raquel Maria de Oliveira Pires ◽

Tatiana Botelho Fantazzini ◽

Hesoisa Oliveira dos Santos ◽

Dayliane Bernardes de Andrade ◽

...

Keyword(s):

Superoxide Dismutase ◽

Chemical Treatment ◽

Current System ◽

X Ray ◽

Chemical Treatments ◽

Maize Seeds ◽

Before And After ◽

Physiological Quality ◽

Fusarium Sp

The current system of seeds production is highly mechanized and these operations can contribute to losses in quality due the incidence of mechanical damages. The objective in this work was to study the effect of the chemical treatment and the storage on quality of maize seeds with mechanical damages. The seeds used were individually analyzed through X-ray test for the obtainment of three lots; 1-seeds without separation, 2-seeds without mechanical damages and 3-seeds with mechanical damages. The lots were evaluated according the physiological quality, sanity and enzymatic analyzes before and after the chemical treatment with the insecticide Maxim Advanced® and the fungicide Cruiser® and also after 90 days of storage. The chemical treatment of maize seeds is efficient in the control of pathogens, like Fusarium sp. The performance of seeds with internal and external damages can be maintained for 90 days when treated with fungicides and insecticides and stored in environment conditions. The isoenzymatic patterns of catalase (CAT), superoxide dismutase (SOD), malate dehydrogenase (MDH) and alcohol dehydrogenase (ADH), confirmed the higher deterioration of non-treated seeds during the storage. The mechanical damages found in seeds contribute to the reduction of viability and vigor of maize seeds.

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Health and physiological quality of corn seeds treated with fungicides and assessed during storage

Journal of Seed Science ◽

10.1590/s2317-15372013000100001 ◽

2013 ◽

Vol 35 (1) ◽

pp. 10-16 ◽

Cited By ~ 5

Author(s):

Christiano de Sousa Machado de Matos ◽

Ellen Noly Barrocas ◽

José da Cruz Machado ◽

Francisco Cardoso Alves

Keyword(s):

Fusarium Verticillioides ◽

Storage Period ◽

Storage Conditions ◽

Performance Assessments ◽

Chemical Treatments ◽

Fungicide Mixtures ◽

Contrast Analysis ◽

Physiological Quality ◽

Germination Vigor

At post-harvest period, quality of corn seeds may be influenced by several important factors such as: presence of harmful microorganisms, chemical treatments, host species genotype and storage conditions. The objective of this study was to evaluate the performance of corn seeds, hybrids 2B 688 and 2B 710, with high incidence of fungus Fusarium verticillioides and treated with mixtures of fungicides thiophanate-methyl + pyraclostrobin (50 mL a.i .100 kg-1 of seeds) and carbendazim + thiram + micronutrients (100 mL a.i .100 kg-1 of seeds) during six months storage. Performance assessments of seeds were carried out at 0, 30, 60, 90, 120, and 180 days storage. The incidence of F. verticillioides, as well as physiological quality, germination, vigor, stand of plants, emergence speed index, and dry matter weight were assessed. It has been verified that seed treatment with fungicide mixtures was efficient for ensuring seed physiological quality of both genotypes and to reduce incidence of F. verticillioides on treated seeds. By contrast, analysis between treatments with fungicides, within each period assessed and each treatment as compared to control along storage period was verified clear benefits on emergence of seeds after treatment with fungicides.

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Physiological maturation of cowpea seeds

Journal of Seed Science ◽

10.1590/2317-1545v36n31007 ◽

2014 ◽

Vol 36 (3) ◽

pp. 312-317 ◽

Cited By ~ 3

Author(s):

Narjara Walessa Nogueira ◽

Rômulo Magno Oliveira de Freitas ◽

Salvador Barros Torres ◽

Caio César Pereira Leal

Keyword(s):

Dry Mass ◽

Germination Percentage ◽

Maturation Process ◽

Cowpea Seeds ◽

Randomized Design ◽

Germination Process ◽

Physiological Quality ◽

Completely Randomized Design ◽

Nutrient Reserves

The seed maturation process is genetically controlled and involves an arranged sequence of morphological and physiological changes extending from fertilization to its total independence from the mother-plant. These changes also include a set of preparatory phases for the germination process, which are characterized for the synthesis and accumulation of nutrient reserves. Thereby, this study was developed aiming at assessing development and physiological quality of cowpea seeds during maturation process. To this, the cowpea pods of cultivar BRS-Guariba were harvested from the tenth day after anthesis (DAA) until the twenty sixth DAA, with four days intervals. Immediately after each harvest, seeds were manually extracted from the pods and then subjected to the following determinations: moisture content, first count of germination, final germination percentage, length of shoots and roots, hypocotyl diameter, and seedling dry mass. The experiment was conducted in a completely randomized design, with five treatments (DAA), and four replications to each treatment. Results have shown that cowpea seeds have fairly fast physiological maturation, and that seeds harvested between 14 and 18 DAA have better vigor as well as higher germination rates; thus the harvest performed during this period does not cause damages to seeds.

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Alternative treatments in bean seeds for repelling Acanthoscelides obtectus (SAY)

Journal of Seed Science ◽

10.1590/2317-1545v40n4192099 ◽

2018 ◽

Vol 40 (4) ◽

pp. 362-369 ◽

Cited By ~ 1

Author(s):

Marcelo Ramos de Oliveira ◽

Lisandro Tomas da Silva Bonome ◽

Henrique von Hertwig Bittencourt ◽

Edenilson Zarowni ◽

Luan da Silva Lefchak

Keyword(s):

Diatomaceous Earth ◽

Storage Period ◽

Piper Nigrum ◽

Seed Moisture Content ◽

Randomized Design ◽

Seed Moisture ◽

Physiological Quality ◽

Storage Times ◽

Acanthoscelides Obtectus Say

Abstract: The objectives of this study were to evaluate treatments with alternative products for repelling bean weevils, and to assess their influence on the physiological quality of Phaseolus vulgaris seeds. The experiment was carried out in a completely randomized design, with four replications, in a two-factorial scheme (10x4). It comprised 10 treatments: Piper nigrum, diatomaceous earth and kaolin (4 g/kg of seed); Cinnamomum zeylanicum, Citrus sinensis and Eucalyptus sp. (1% of the seed weight); Azadirachta indica oil (3 mL/kg of seed); Gastoxin (6 g/t of seed); PET container; control; and the storage times of 0, 25, 50, and 75 days. The variables seed moisture content, germination, emergence speed, mean emergence time, weight of one thousand seeds, seed infestation, and repellency were evaluated. The treatments with kaolin and A. indica had a repellent effect at first, but they lost effectiveness by the end of the storage period. The products based on C. zeylanicum and Eucalyptus sp. did not have such impact during early periods of storage, albeit repellency grew with time. On the other hand, C. sinensis and diatom-based products were repellents, both at the beginning and at the end of storage. The treatments with diatomaceous earth, kaolin, P. nigrum, C. zeylanicum, Eucalyptus sp., A. indica, and PET container all proved to be effective in reducing bean weevil infestation, without negatively impacting the physiological quality of the seeds.

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Impact of storage on the physiological quality of soybean seeds after treatment with fungicides and insecticides

Journal of Seed Science ◽

10.1590/2317-1545v42236236 ◽

2020 ◽

Vol 42 ◽

Author(s):

Luciano Del Bem Junior ◽

Jonas Leandro Ferrari ◽

Gustavo Dario ◽

Carlos Gilberto Raetano

Keyword(s):

Chemical Treatment ◽

Seedling Emergence ◽

Maximum Yield ◽

Accelerated Aging ◽

Storage Period ◽

Yield Potential ◽

Soybean Seeds ◽

Thiophanate Methyl ◽

Physiological Quality

Abstract: Chemical seed treatment is a practice that assists in control of pests and pathogens and allows crops to achieve their maximum yield potential. However, the storage period of seeds treated with insecticides and fungicides can affect seed physiological potential. The aim of this study was to evaluate the physiological quality of soybean seeds treated with different fungicides and insecticides after four different storage periods. The experimental design was completely randomized and the treatments were distributed in a 10 × 4 factorial arrangement in which the soybean seeds of the cultivar BMX Potência RR were treated with the following phytosanitary products: fipronil + pyraclostrobin + thiophanate-methyl, thiophanate-methyl, carbendazim, carboxin + thiram, imidacloprid + thiodicarb, chlorantraniliprole, thiamethoxam, cyantraniliprole, fipronil, and a control (seeds without chemical treatment), in four replications. The seeds were evaluated at 0, 30, 60, and 90 days after the chemical treatment. The following tests were performed: germination, first count of germination, accelerated aging, seedling emergence in sand, seedling emergence speed, and seedling dry matter. The treatment with the carboxin + thiram fungicide mixture provided for adequate physiological quality of the seeds throughout storage. The insecticide thiamethoxam has a negative effect on the physiological quality of soybean seeds that are stored after treatment with it.

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Physiological quality of soybean seeds grown under different low altitude field environments and storage time

Plant Soil and Environment ◽

10.17221/512/2020-pse ◽

2021 ◽

Vol 67 (No. 2) ◽

pp. 92-98

Author(s):

Kevein Ruas Oliveira ◽

Fellipe Ramos Sampaio ◽

Giovano Souza Siqueira ◽

Ícaro Monteiro Galvão ◽

Sarita Jane Bennett ◽

...

Keyword(s):

Storage Time ◽

Soybean Seed ◽

Storage Period ◽

Soybean Seeds ◽

Seed Moisture Content ◽

Before And After ◽

Physiological Quality ◽

Low Altitude ◽

And Storage

The use of high-quality seeds is essential to maintain high rates of production and productivity. The physiological quality of seeds obtained in the field is directly correlated to storage conditions and storage time. This study aimed to evaluate the physiological quality of soybean seeds in relation to different field environments (seed lots) and storage time. Commercial lots of seeds of the soybean cultivar M8349 IPRO were stored for three and six months. Seed moisture content was determined before and after accelerated aging, along with seed germination percentage and vigour evaluations performed before and after each storage period. The experiment was carried out as a completely randomised factorial design (10 × 3): with ten seed lots and three storage periods. The data were analysed by ANOVA, and the means of four independent replicates for each parameter evaluated were compared using the Scott-Knott test at 5% probability (P ≤ 0.05). Our results revealed that the low altitude regions where the seed samples were collected are suitable for soybean seed production with high physiological quality. Seed storage for six months does not cause a significant reduction in subsequent soybean seed field performance.

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Physiological and sanitary quality of soybean seeds under different chemical treatments during storage

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v20n11p1020-1024 ◽

2016 ◽

Vol 20 (11) ◽

pp. 1020-1024 ◽

Cited By ~ 5

Author(s):

Gerusa M. Conceição ◽

Alessandro D. Lúcio ◽

Liliane M. Mertz-Henning ◽

Fernando A. Henning ◽

Manoela Beche ◽

...

Keyword(s):

Chemical Treatment ◽

Seed Quality ◽

Accelerated Aging ◽

Storage Period ◽

Dry Weight ◽

Soybean Seeds ◽

Randomized Design ◽

Seedling Length ◽

Physiological Quality

ABSTRACT The purpose of this study was to evaluate the effect of the chemical treatment with fungicide, insecticide, micronutrient and polymer on physiological and sanitary quality of soybean seeds during storage. The treatments were arranged in a 3 x 5 x 5 factorial scheme (cultivars x seeds treatment x storage period), in completely randomized design with four replicates. Three cultivars were used: NA 4823RG, BMX TurboRR and Fundacep 62RR. The treatments were: T1: no chemical treatment, T2: fungicide, insecticide and micronutrient; T3: fungicide, insecticide, micronutrient and polymer, T4: fungicide; T5: insecticide. After the chemical treatment, the seeds were stored under environmental conditions from May to December 2012, and seed quality was evaluated at 0, 2, 4, 6 and 8 months of storage. Seeds water content and physiological quality were determined through tests of germination, accelerated aging, seedling length, seedling dry weight and sanity. The treatment with fungicides, insecticides, micronutrients and polymer did not affect seed quality over eight months of storage and promoted the control fungi associated with the seeds.

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