Quality of maize seeds harvested and husked at high moisture levels

Ferreira, Valquíria de Fátima; Oliveira, João Almir; Ferreira, Thaís Francielle; Reis, Leandro Vilela; Andrade, Vanessa; Neto, Jaime Costa

doi:10.1590/s2317-15372013000300001

Cited by 15 publications

(10 citation statements)

References 14 publications

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“…According to Peske et al (2012), this is one of the main reasons why the hybrid seed corn industry adopts harvesting in ears, allowing this process to be carried out nearer to physiological maturity. This also reduces the risk to seeds from contaminants (Ferreira et al, 2013). In seeds harvested in the ear, a reduction in germination throughout the period was not observed, regardless of storage conditions ( Figures 1C and 1D).…”

Section: Resultsmentioning

confidence: 90%

“…Another option is harvesting whole ears, without removing the husk and the cob, when the seeds still have around 30% moisture and dry them artificially before shelling (Rosa et al, 2002). That will reduce the risk of seeds from being contaminated by diseases at the end of the cycle (Ferreira et al, 2013) since the seeds are removed from the field earlier, near physiological maturity.…”

Section: Introductionmentioning

confidence: 99%

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Physiological performance during storage of corn seed treated with insecticides and fungicide

Deuner¹,

Rosa

Meneghello³

et al. 2014

J. Seed Sci.

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-The goal of storage is to maintain the characteristics that seeds have immediately after processing; however, when this is over longer periods, storage may cause loss in quality. The aim of this study was to evaluate the effect of treatment with insecticide and fungicide on corn seeds harvested in kernel form and in the ear over the time of storage in two environments for 360 days. The seeds were subjected to the following treatments: T1 -control; T2 -Deltamethrin + Pirimiphosmethyl + Fludioxonil; T3 -Deltamethrin + Pirimiphos-methyl + Fludioxonil + Thiamethoxam; T4 -Thiamethoxam, and T5 -Fenitrothion. They were then placed in paper bags and stored in two environments, in a cold room with an average temperature of 16 °C and RH of 60% and in a non-controlled environment (an average room temperature of 25 ºC and RH of 70%) located in the municipality of Pelotas, RS, Brazil. Every four months (0, 120, 240 and 360 days), seed germination and vigor was evaluated by the first count of germination test and cold test. Reduction in germination and vigor of corn seeds, conditioned by the insecticides and fungicide used in the seed treatment, vary according to the product and the time over which the seeds remain stored. The seeds harvested in the ear show lower loss of physiological quality than those harvested in kernel form.Index terms: Zea mays L., germination, vigor, seed treatment.Desempenho fisiológico durante o armazenamento de sementes de milho tratadas com inseticidas e fungicida RESUMO -O armazenamento tem por objetivo manter as características que as sementes possuem imediatamente após o beneficiamento, porém, quando por períodos mais extensos, o mesmo pode causar perdas na qualidade das mesmas. O objetivo neste trabalho foi avaliar o efeito do tratamento com inseticida e fungicida sobre sementes de milho colhidas a granel e em espiga durante o armazenamento em dois ambientes por 360 dias. As sementes foram submetidas aos tratamentos: T1-testemunha; T2-Deltamethrin + Pirimifós-metílico + Fludioxonil; T3-Deltamethrin +Pirimifós-metílico + Fludioxonil + Tiametoxam; T4-Tiametoxam e T5-Fenitrothion. Em seguida, foram acondicionadas em sacos de papel e armazenadas em dois ambientes: câmara fria com temperatura média de 16 °C e UR de 60% e em ambiente não controlado (câmara com temperatura média de 25 ºC e UR de 70%, localizada no município de Pelotas-RS). A cada quatro meses (0; 120; 240 e 360 dias) foi avaliada a germinação e o vigor das sementes, pelos testes de primeira contagem de germinação e teste de frio. A redução da germinação e do vigor de sementes de milho, condicionada pelos inseticidas e fungicida utilizados no tratamento das sementes, varia em função do produto e do tempo em que as sementes permanecem armazenadas. As sementes colhidas em espiga apresentam menor perda da qualidade fisiológica em relação às colhidas a granel.Termos para indexação: Zea mays L., germinação, vigor, tratamento de sementes.1

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Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Physiological performance during storage of corn seed treated with insecticides and fungicide

Deuner¹,

Rosa

Meneghello³

et al. 2014

J. Seed Sci.

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“…The reduction in water content seen for the SF-15 cultivar at the spacing of 80 cm can be attributed to the fact that it spent more time in the field under high temperatures and at a larger spacing, which may have resulted in a greater loss of water. According to Ferreira et al (2013), water content directly affects seed quality: the greater the water content of the seed when harvested, the greater the probability of mechanical damage, making it necessary to give great attention to this stage of production.…”

Section: Figmentioning

confidence: 99%

Physiological quality of sweet sorghum [Sorghum bicolor (L.) Moench.] seeds in response to planting density in semi-arid region

Silva¹,

Lopes²,

Oliveira³

et al. 2017

Aust J Crop Sci

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Sweet sorghum is a bioenergy crop that produces high amount of ethanol per hectare even under semi-arid conditions, serving as an alternative to sugarcane inter-season in Brazil. The aim of this study was to evaluate the influence of planting density on the physiological quality of sweet sorghum seeds. Two sweet sorghum cultivars (BRS 506 and SF-15) were submitted to a spacing of 50, 60, 70 and 80 cm between rows, and 8, 12 and 16 cm between plants. The experimental design was of randomised blocks with four replications in a 2 x 4 x 3 factorial scheme, comprising two cultivars, four row spacings and three spacings between plants. The following were evaluated from the collected panicles: seed quantity, 100 seed weight, water content, germination, first germination count and speed of germination, accelerated ageing, and seedling vigour. It was found that both the cultivar and the arrangement of plants in the field affect the physiological quality of sweet sorghum seeds. The BRS 506 cultivar is recommended for seed production under semi-arid conditions, at a spacing of 16 cm between plants and 80 cm between rows, and a density of 78,125 plants per hectare.

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“…Right after seeds reach physiologic maturity, storage phase is initiated, even before harvest is performed, called field storage [4]. However, for it is hygroscopic, seeds present a considerable variation of water content, due to relative humidity [5], and because of that, low water content in the seed associated with the low temperature of the storage environment and lower relative humidity, are relevant factors for viability and vigor maintenance of the seed for a long term period [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Water Content on the Quality of Pigeonpea Seeds

Lisbôa¹,

Araújo²,

Teixeira³

et al. 2017

AJPS

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The species Cajanus cajan L. where pigeonpea is from presents a harvest potential in tropical regions for it is used as human and animal feed, besides being used as green fertilizer. However, the harvest area of this Fabaceae is still insignificant, due to especially the lack of quality seeds. In this context, it is possible to affirm that drying and store are portrayed as important steps for obtaining superior quality seeds. The aim of this study is to evaluate the physiologic quality of dwarf pigeonpea seeds, with different water content during storage. A factorial scheme 3 × 6 was adopted in the delimitation completely randomized, with four replications. Treatments were constituted by the combination of lots of seeds containing three different water contents (11%, 14% and 16%), submitted to a 10-month storage period, with evaluations every two months (0, 2, 4, 6, 8 and 10). Seeds were stocked in a bag type kraft under normal lab conditions, that is, no control. Physiologic quality of the seeds was evaluated through the following tests: Germination Pattern Test-GPT, first count of germination, accelerated aging and electric conductivity. It can be concluded that pigeonpea with hard seeds containing water content at 11% existing superior physiologic quality throughout the 10-month storage, under no controlled condition, certainly promoted by the less intense breathing from the reserves cumulated in the seed lot. Pigeonpea seeds storage with water content superior to 14% promotes a sharp decrease of physiologic quality, due to an increase in metabolic activity.

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Quality of maize seeds harvested and husked at high moisture levels

Cited by 15 publications

References 14 publications

Physiological performance during storage of corn seed treated with insecticides and fungicide

Physiological performance during storage of corn seed treated with insecticides and fungicide

Physiological quality of sweet sorghum [Sorghum bicolor (L.) Moench.] seeds in response to planting density in semi-arid region

Influence of Water Content on the Quality of Pigeonpea Seeds

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