Physiological quality of Urochloa seeds treated with thiamethoxam

Andréia da Silva Almeida, Geison Rodrigo Aisenberg, Cristiane Deuner, Géri Eduardo Meneghello, Francisco Amaral Villela

Resumo


The product thiametoxam has shown positive effects as increased expression of vigor and biomass formation, raising the photosynthetic rate and formation of deeper roots. The objective of this study was to evaluate the effect of seed treatment with the insecticide thiamethoxam in seeds of U. brizantha cv. Marandu and U. brizantha cv. Xaraés. For this purpose, seeds of the cultivar Marandu and Xaraés which were treated with thiamethoxam bioactivator at doses of zero, 100, 200, 300, 400 and 500 mL 100 kg-1 of seeds. The evaluation of physiological seed quality Urochloa occurred by con­ducting germination tests, cold test, accelerated aging, seedling length, length of shoot and root length, and emergency field will. The use of thiamethoxam positively affects the physiological seed quality Urochloa. The dose range of thiamethoxam which allowed obtaining the best quality physiological to the two cultivars of Urochloa extends from 230 to 280 mL 100 kg-1 seeds.


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DOI: http://dx.doi.org/10.15361/1984-5529.2015v43n1p67-76