Drift of sub-doses of glyphosate in young plants of Varjão (Parkia multijuga, Benth.)

Rubens Marques Rondon Neto, Kleiber Moura de Oliveira, Oscar Mitsuo Yamashita

Abstract


This work aimed to evaluate the response to toxicity of different sub-doses of glyphosate in young plants of varjão (Parkia multijuga, Benth.). The experiment was installed in the experimental area of UNEMAT – State University of Mato Grosso, in Alta Floresta – Mato Grosso state. The treatments tested were three sublethal rates of glyphosate (T1-6%, T2-12%, T3-24% of the recommended dose of 3.0 L ha-1) and T4-control (without application). After 7, 14, 21, 28 days and 6 months of the application of the herbicide, it was performed measurements of the height and diameter of the cervix of plants and given the notes of phytotoxicity. After 6 months of the application of the herbicide, it was found that the increasing doses of glyphosate caused injuries in the leaves and reduction of growth in height in plants of Parkia multijuga, there was low index of mortality, however, it was verified a significant improvement in all treatments.


Keywords


phytotoxicity; herbicide; native species



DOI: https://doi.org/10.5777/paet.v3i3.1073