Thiametoxam em tratamento de sementes

Carvalho, Nathália Leal; Perlin, Rômulo Souza; Costa, Ervandil Corrêa

doi:10.5902/223613082314

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…In the Tropical cultivar, the highest levels of proline were found in the doses 0 and 1.2 mL with averages of 0.3 and 0.25 µmol g -1 FM, respectively. The application of thiamethoxam increased the expression of seedling vigor of cotton seeds (Almeida et al, 2020) and wheat (Carvalho et al, 2011). These authors found that with the application of this insecticide, the synthesis of amino acids resulted in the production of new proteins.…”

Section: Resultsmentioning

confidence: 98%

Tratamentos pré-germinativos em sementes de cenoura com bioativador

Guirra

Torres

Cardozo

et al. 2022

Rev. Agric. Neotrop.

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A cenoura é uma hortaliça com papel socioeconômico importante, tanto pelo elevado emprego de mão-de-obra, quanto por sua alta comercialização. Para otimizar o estabelecimento dessa cultura em campo se torna imprescindível sementes com germinação rápida e uniforme. Por isso, tem-se utilizado o tratamento de sementes como técnica para viabilizar o desempenho germinativo e expressão de vigor. Desse modo, objetivou-se avaliar os efeitos do tiametoxam no desempenho fisiológico de sementes de cenoura durante a germinação e desenvolvimento inicial de plântulas. O delineamento experimental foi o inteiramente casualizado, em esquema fatorial 5 x 4, sendo cinco cultivares de cenoura e quatro dosagens de tiametoxam (0; 0,4; 0,8 e 1,2 mL). Avaliaram-se a germinação, primeira contagem de germinação, comprimento e massa seca de plântula, além de análises bioquímicas do conteúdo de açúcares totais, aminoácidos totais e prolina. Os dados coletados foram submetidos à análise de variância (p ≤ 0,05) seguido do teste de Tukey e análise de regressão. O tratamento de sementes de cenoura com tiametoxam, no geral, influenciou positivamente a germinação das sementes das cultivares estudadas. No entanto, as dosagens de 0,4 e 0,8 mL de tiametoxam para cultivar Tropical não houve influência positivamente o desenvolvimento de plântulas. A dose de 1,2 mL do bioativador, para a cultivar Alvorada, foi benéfico ao desenvolvimento de plântulas e acúmulo de metabólitos.

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Section: Resultsmentioning

confidence: 98%

Tratamentos pré-germinativos em sementes de cenoura com bioativador

Guirra

Torres

Cardozo

et al. 2022

Rev. Agric. Neotrop.

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“…In reference to the results obtained, we can mention the observations made by other authors such as Dan et al (2012) who inform that there are insecticides that, in addition to providing control over pests, can act physiologically, assisting together in the initial growth and development of the plant. Similarly, Carvalho et al (2011) point out that there are insecticides that acts in activating proteins transporting cell membrane, allowing the greatest ion transport, increasing mineral plant nutrition and promoting positive responses in the development and plant productivity.…”

Section: Germination and Emergence Of Seedsmentioning

confidence: 99%

“…In another investigation, it was found that soybeans treated with the same active ingredient presented higher amino acid content, enzymatic activity and synthesis of plant hormones that make the seedlings have a greater response to these proteins, allowing a better expression of the seedlings and greater tolerance for stressful situations. Carvalho et al (2011) point out that there are insecticides that can promote greater efficiency in enzymatic activation both in seeds and in adult plants, where the greater enzymatic activity would increase both the primary and secondary metabolism, thus increasing the synthesis of amino acids precursors of new proteins. And the endogenous synthesis of plant hormones, where the responses of plants to these proteins and hormonal biosynthesis would be related to significant increases in vigor.…”

Section: Germination and Emergence Of Seedsmentioning

confidence: 99%

Efficacy of Insecticides Applied to Soybean Seeds for Controlling Lepidoptera Caterpillars

Aquino¹,

López²,

Aguilera³

et al. 2022

JAS

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The use of high-quality seeds is essential for the crop to express its full potential. The application of seed treatment constitutes a widely spread operation, every year new products are discovered and used for seed treatment, which can provide a protective effect against pests that attack the seeds, as well as physiological effects to favor the growth and initial development of plants, however, little is known about the influence of insecticides on seed germination and the emergence of soybean seedlings. The experiment was carried out in the Seed Quality Analysis Laboratory and in the experimental field of the Agrarian Sciences Faculty of the National University of Asunción-Paraguay. The objective consisted of evaluating the efficacy of chemical insecticides applied to soybean seeds to control lepidopteran caterpillars during the implantation of the crop, and the effect on the germination of seeds in the laboratory and the emergence in the field. Commercial soybean seeds were used and the treatments were the following (in cc of c.p./100 kg seeds): control (without treatment), thiamethoxam (200), cyantraniliprole + thiamethoxam (200), thiamethoxam + lambda-cyhalothrin (200), imidacloprid (400), imidacloprid + thiodicarb (500) and fipronil (200). The variables evaluated were: germination under laboratory conditions, number of larvae presented at 14, 21 and 28 days after emergence, seedling emergence and efficacy of chemical products in the field. The design used in the field was complete block to the random and in laboratory fully randomized, with seven treatments and 4 replications with a total of 28 experimental units for both trials. The data obtained were compared through the analysis of variance using the statistical software SASM-Agri and those variables that presented significant statistical differences between the means of the treatments were compared using the Scott-Knott test at 5% probability, while efficacy was determined by the Abbot formula. The data show that the chemical insecticides did not affect the germination of seeds in the doses tested. The highest percentages of emergence in the field were obtained with the insecticides thiamethoxam, cyantraniliprole + thiamethoxam, imidacloprid and imidacloprid + thiodicarb. At 28 day after seedling emergence the active ingredients cyantraniliprole + thiamethoxam and imidacloprid + thiodicarb achieved the greatest reduction in the lepidoptera population. Seed treatment with the active ingredients used in this study is an effective practice for the control of Spodoptera frugiperda, Spodoptera cosmioides and Agrotis ipsilon caterpillars during the initial stage of soybean cultivation.

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Physiological potential and initial development of soybean plants as a function of seed treatment

Del

Ferrari

Dario

et al. 2019

Pesqui. Agropecu. Trop.

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Seed treatment is a process that helps to control insects and soil-borne pathogens, besides allowing a given crop to reach its maximum production potential and protect its seedlings. This study aimed to evaluate the physiological performance of seeds and the initial development of soybean, as a function of seed treatment. The study was based on a completely randomized design, with five treatments [imidacloprid + thiodicarb (75 + 225 g a.i. 100 kg-1 of seeds); chlorantraniliprole (62.5 g a.i. 100 kg-1 of seeds); cyantraniliprole (72 g a.i. 100 kg-1 of seeds), fipronil + thiophanate-methyl + pyraclostrobin (5 + 45 + 50 g a.i. 100 kg-1 of seeds); and control (seeds without treatment)]. Initially, the physiological quality of the seeds was evaluated by determining the first germination count, final germination and accelerated aging, with four replications. After that, the effect of the seed treatment on the soybean plant development was evaluated by analyzing the leaf area, number of leaves, shoot height, root and shoot dry mass and fresh mass of root nodules, with ten replications. The seed treatment with fipronil + pyraclostrobin + thiophanate-methyl allows an increased germination when the seeds are subjected to the accelerated aging test, besides an increment in the shoot height and leaf area of the plants.

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Thiametoxam em tratamento de sementes

Cited by 4 publications

References 1 publication

Tratamentos pré-germinativos em sementes de cenoura com bioativador

Tratamentos pré-germinativos em sementes de cenoura com bioativador

Efficacy of Insecticides Applied to Soybean Seeds for Controlling Lepidoptera Caterpillars

Physiological potential and initial development of soybean plants as a function of seed treatment

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