Can 2,4-D promote the hormesis effect in upland rice?

Autor: Marsala, Leonardo1 (AUTHOR), Oliveira Cunha, Matheus Luís2 (AUTHOR) matheus.cunha@unesp.br, do Nascimento, Vagner3 (AUTHOR), Pereira Prado, Evandro3 (AUTHOR), da Silva Viana, Ronaldo3 (AUTHOR), Ferrari, Samuel3 (AUTHOR)
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Zdroj: Journal of Environmental Science & Health. Part B. Pesticides, Food Contaminants & Agricultural Wastes. 2022, Vol. 57 Issue 8, p680-685. 6p.
Abstrakt: This study aimed to evaluate the influence of low doses of 2,4-D on the agronomic traits of upland rice applied at different stages of crop growth. The work was carried out in a randomized completly blocks, and consisted of the application of 5 low doses of the 2,4-D herbicide (0, 0.68, 1.36, 2.04, 3.40 and 5.44 g acid equivalent (e.a.) ha−1) in two stages of rice development (tillering and floral differentiation). Nitrogen contentes in leaves, SPAD index and yield are higher when low doses of 2,4-D is applied in the tillering stage. Application of 2,4-D at a dose of 2.04 g a.e ha−1 results in a 19% increase in the number of spikelet per panicle. On the other hand, there is no effect of the application of low doses of 2,4-D on height, number of stems, active tillering and weight of 100 seeds. Our results contribute to increase knowledge of the hormesis effect in plants in order to increase crop yield. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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