Open AccessRESIDUAL DO HERBICIDA IMAZETAPIR NA CULTURA DO MILHO
Author(s) -
Cleberly Evangelista dos Santos,
Abilio Nobrega Reis,
Ana Carolina Ferreira,
Renata Pereira Marques
Publication year - 2018
Publication title -
colloquium agrariae
Language(s) - English
Resource type - Journals
ISSN - 1809-8215
DOI - 10.5747/ca.2018.v14.n3.a237
Subject(s) - sowing , phytotoxicity , agronomy , shoot , crop , dry weight , biology , seedling , weed control , horticulture
One of the problems in modern agriculture is the residue of herbicides in the succession of crops, mainly the corn crop in sequence to the culture of the soybeans, better known as corn crop. Succession is a common practice of grain production systems, aiming to maximize yields of the properties, and some practices adopted in the management of the summer crop can directly affect the subsequent crop. The objective of this research was to evaluate the residual effect of the herbicide imazethapyr on the cultivation of soybeans in pre-emergence or desiccation on maize cultivation in succession in its initial stages.It was a trial with 5 treatments and 4 replications in a completely randomized design, involving different corn sowing times: 90, 105, 120 and 135 days after application(DAA) of the herbicide imazetapir, and a control treatment without the application of the herbicide. Percentage of phytotoxicity was analyzed at 7, 14, 21 and 28 days after sowing (DAS), seedling emergence velocity, shoot dry mass and root weight at 28 DAS. The treatments sown with 90 and 105 DAA showed a phytotoxicity effect in all the evaluations, also presenting lower weight of shoot and root dry mass, thus demonstrating the residual effect and influence of the herbicide on the crop up to 105 DAA. Regarding the emergence of seedlings, the treatments did not differ.