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Treatment of rice seeds with thiamethoxam: reflections on physiological performance

Thiamethoxam is a systemic insecticide that is transported within the plant through its cells and can activate various physiological reactions such as protein expression. These proteins interact with defense mechanisms against stress in adverse growing conditions. The objective of this study was to...

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Bibliographic Details
Published in:Journal of seed science 2014-12, Vol.36 (4), p.458-464
Main Authors: Almeida, Andreia da Silva, Deuner, Cristiane, Borges, Carolina Terra, Meneghello, Géri Eduardo, Jauer, Adilson, Villela, Francisco Amaral
Format: Article
Language:English
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Summary:Thiamethoxam is a systemic insecticide that is transported within the plant through its cells and can activate various physiological reactions such as protein expression. These proteins interact with defense mechanisms against stress in adverse growing conditions. The objective of this study was to evaluate the effect of thiamethoxam in rice seeds and the potential benefits that it can provide. Two experiments were carried out and, in both, seeds were treated with commercial product containing 350 g of thiamethoxam active ingredient per liter of product, at doses 0, 100, 200, 300 and 400 mL.100 kg-1 of seeds: 1) it was conducted with three lots of IRGA BR 424 cultivar rice seeds, which were submitted to the following laboratory tests: germination, cold test, accelerated aging test, as well as field assessment: total seedling length, root system length, number of panicles and productivity; 2) four lots of IRGA BR 424 cultivar rice seeds, two high and two low-vigor, were subjected to the following tests: germination, cold test and greenhouse seedling emergence test. Thiamethoxam rice seed treatment positively favors the seed quality. O tiametoxam é um inseticida sistêmico que é transportado dentro da planta através de suas células e pode ativar várias reações fisiológicas como a expressão de proteínas. Estas proteínas interagem com mecanismos de defesa a estresses em condições adversas de cultivo. O objetivo deste trabalho foi avaliar o efeito do tiametoxam em sementes de arroz e os potenciais benefícios que o tratamento possa proporcionar. Foram realizados dois experimentos, sendo em ambos as sementes tratadas com produto comercial contendo 350 gramas de ingrediente ativo de tiametoxam por litro nas concentrações de 0, 100, 200, 300 e 400 mL.100 kg-1 de sementes: 1) realizado com três lotes de sementes de arroz, da cultivar IRGA BR 424, as quais foram submetidas a testes no laboratório: germinação, teste de frio, envelhecimento acelerado, e avaliações à campo: comprimento total de plântula e radicular, número de panículas e produtividade; 2) utilizados quatro lotes de sementes da cultivar IRGA BR 424, sendo dois de alto vigor e dois de baixo, submetidos aos seguintes testes: germinação, teste de frio e emergência em casa de vegetação. O tratamento de sementes de arroz com tiametoxam favorece o desempenho ou potencial fisiológico das sementes.
ISSN:2317-1537
2317-1545
2317-1545
DOI:10.1590/2317-1545v36n4980