scholarly journals Physiological quality of cowpea seeds for different periods of storage

2017 ◽  
Vol 48 (5) ◽  
pp. 817-823
Author(s):  
Oscar José Smiderle ◽  
Aline das Graças Souza ◽  
José Maria Arcanjo Alves ◽  
Cylles Zara dos Reis Barbosa
Keyword(s):  
Cowpea Seeds ◽  
Physiological Quality

scholarly journals Application of Trichoderma harzianum on the physiological quality of cowpea seeds

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

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

2020 ◽  
Vol 9 (7) ◽  
pp. e686974625
Author(s):  
Erick Almeida Andrade ◽  
José Eldo Costa ◽  
Rosilene de Morais da Silva ◽  
Julian Junio de Jesus Lacerda ◽  
Bruno Ettore Pavan ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Storage Period ◽  
Dry Mass ◽  
Hypocotyl Length ◽  
Seed Moisture Content ◽  
Chemical Treatments ◽  
Pet Bottles ◽  
Cowpea Seeds ◽  
Physiological Quality

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.

scholarly journals Physiological and Sanitary Quality in Cowpea Seeds Produced in Rio Grande Do Norte, Brazil

2019 ◽  
Vol 11 (3) ◽  
pp. 581
Author(s):  
Ronimeire T. da Silva ◽  
Maria de F. Q. Lopes ◽  
Francisco H. A. de Andrade ◽  
Riselane de L. A. Bruno ◽  
Otília R. de Fárias ◽  
...  
Keyword(s):  
Rio Grande ◽  
Germination Percentage ◽  
Cowpea Seeds ◽  
Seed Pathology ◽  
Seed Analysis ◽  
Seedling Length ◽  
Cowpea Varieties ◽  
Physiological Quality ◽  
Aspergillus Sp

The importance of cowpea (Vigna unguiculata (L.) Walp.) to the Northeast region of Brazil is undeniable, it is a major crop in local family agriculture. As a result, the research aimed to evaluate the physiological and sanitary quality of local varieties of cowpea coming from the state of Rio Grande do Norte. The experiment was carried out at the Seed Pathology and Seed Analysis Laboratory, in Federal University of Paraíba, Campus II, Areia, Paraiba, Brazil. Six cowpea varieties (Baeta, Coruja, Sempre Verde, Epace 10, Feijão da Bahia and Pingo de Ouro) from rural Area of the municipality of Apodi, Rio Grande do Norte, Brazil.were evaluated  Seed physiological quality was evaluated by determining the first germination count (FGC), germination percentage (G%), seedling length (SL) and electrical conductivity (EC). The sanitary quality of the seeds was evaluated by the method of incubation in filter paper (blotter test). The experimental design was completely randomized, with 4 replicates. The Pingo de Ouro, Sempre Verde and Coruja varieties had germination percentages greater than the minimum standards required for commercialization, while the lower germination percentage and vigor of the Feijão da Bahia, Epace 10 and Baeta varieties may be associated with the presence of Aspergillus sp. and Penicillium sp.

scholarly journals Late harvest and chemical treatment of cowpea seeds

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.

scholarly journals Efficiency of application of Trichoderma on the physiological quality and health of cowpea seeds

2019 ◽  
Vol 10 (2) ◽  
pp. 301-307 ◽  
Author(s):  
Higor Barbosa Reis ◽  
Artenisa Cerqueira Rodrigues ◽  
Aloisio Freitas Chagas Junior ◽  
Aurenivia Bonifacio ◽  
Gil Rodrigues Santos
Keyword(s):  
Biological Control ◽  
Seed Treatment ◽  
Indole Acetic Acid ◽  
Biological Control Agents ◽  
Fusarium Spp ◽  
Cowpea Seeds ◽  
Trichoderma Sp ◽  
Physiological Quality ◽  
High Degree

One of the main causes of low productivity of cowpea crops in Brazil is the use of low quality seeds. Low quality seeds have a high degree of infestation by phytopathogens, mainly fungi. Seed treatment with biological control agents, such as fungi of the genus Trichoderma, is a useful alternative to reduce or inhibit the transmission of diseases via seeds. In view of the above, this study aims to evaluate the physiological and sanitary quality of cowpea seeds treated with conidia of Trichoderma sp. (1.2, 2.4, 4.8 and 9.6 x 108 CFU g-1). We evaluated the germination and the sanity of seeds, length of seedling radicles, and production of indole acetic acid (IAA) by fungi. The experimental design was completely randomized in all experiments. In general, there was a predominance of Fusarium spp. and Rhizoctonia solani. The treatment of seeds with the conidia of Trichoderma sp. was positive for the parameters related to germination and radicle length of cowpea beans up to the concentration 4.8 x 108 CFU g-1. We conclude that the application of Trichoderma sp. was efficient in reducing the incidence of Fusarium spp., and promoted the germination and elongation of the radicle in cowpea.

scholarly journals Production and quality of cowpea seeds desiccated with saflufenacil and flumioxazin

2021 ◽  
Vol 25 (3) ◽  
pp. 209-215
Author(s):  
Jeovane N. Silva ◽  
Adriano Jakelaitis ◽  
Jacson Zuchi ◽  
Leandro S. Pereira ◽  
Estevam M. Costa ◽  
...  
Keyword(s):  
Yield Components ◽  
Physiological Maturity ◽  
Cowpea Seeds ◽  
Split Plot ◽  
Physiological Quality ◽  
Technological Quality ◽  
Main Factor ◽  
Plot Design

ABSTRACT The use of desiccants allows to anticipate cowpea harvest at a time closer to physiological maturity. The desiccants saflufenacil and flumioxazin promote the drying and falling of leaves and loss of water from seeds. This study aimed to evaluate the effects of saflufenacil and flumioxazin doses applied to the cowpea crop on the production and quality of seeds at harvest and after storage for six months. Two experiments were carried out in a split-plot design (5 × 2). In the first experiment, the main factor consisted of saflufenacil doses (0, 25, 50, 100, and 150 g ai ha-1), while the second factor consisted of evaluation periods (after harvest and six months after harvest). In the second experiment, the main factor consisted of flumioxazin doses (0, 10, 20, 30, and 40 g ai ha-1) and the second factor consisted of the same evaluation periods. The treatments were designed in randomized blocks, with four replications. Saflufenacil application from 25 g ha-1 compromised the yield components and technological quality, while flumioxazin doses did not affect the yield components. Storage at 20 °C for six months decreased the physiological quality of seeds. Flumioxazin application at cowpea harvest promoted uniformity of maturity and harvest anticipation, without compromising the physiological quality after harvest.

scholarly journals Physiological Quality of Cowpea Seeds Produced in Southwestern Nigeria

2013 ◽  
Vol 3 (6) ◽  
pp. 464-468
Author(s):  
J.O. Olasoji ◽  
◽  
A.A. Olosunde ◽  
J.O. Okoh ◽  
◽  
...  
Keyword(s):  
Southwestern Nigeria ◽  
Cowpea Seeds ◽  
Physiological Quality

scholarly journals Interactive Influence of Location and Variety on Physiological Quality of Cowpea Seeds (Vigna unguiculata (L) Walp.)

2021 ◽  
pp. 20-25
Author(s):  
F. E. Awosanmi ◽  
M. Ogunleye ◽  
G. O. Awosanmi ◽  
B. S. Olisa ◽  
S. A. Ajayi
Keyword(s):  
Electrical Conductivity ◽  
Seed Weight ◽  
Germination Rate ◽  
Germination Percentage ◽  
Accelerated Ageing ◽  
Percentage Germination ◽  
Production Environment ◽  
Cowpea Seeds ◽  
Physiological Quality

The production environment plays a significant role in the production of high-quality seeds. Therefore, the knowledge of the relative contributions of the different factors that impact seed quality will be important for the management of seed production. The objective of this study was to assess the relative contribution of location and variety to the physiological quality of the cowpea seeds. Seeds of two varieties of cowpea, IT97K-918-118 and 977K-1499-35 were produced at three locations: Ikenne, Ilora, and Ballah. Hundred seed weight, seed moisture content, standard germination, accelerated ageing germination and electrical conductivity tests were carried out on the seeds. The results indicated that the location effect was highly significant (P<0.05) for hundred seed weight, germination percentage, germination rate index, accelerated ageing germination percentage and accelerated ageing germination rate index, while the varietal effect was highly significant for only hundred seed weight. However, location alone contributed more than 50% to the observed variability in hundred seed weight, germination percentage, germination rate index and accelerated ageing germination percentage. Seeds from Ballah had the highest viability (germination percentage = 84.67%) but also the lowest vigour (accelerated ageing germination = 11%; electrical conductivity = 64.10µscm-1g-1). Thus, the modulating effect of the environment on the quality of cowpea seeds is not the same for the different components of quality and the choice of location for the production of cowpea seeds should be given a higher priority than a choice of variety per se.

scholarly journals Physiological maturation of cowpea seeds

2014 ◽  
Vol 36 (3) ◽  
pp. 312-317 ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document