Banca de DEFESA: ANA ROSA DE OLIVEIRA FARIAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANA ROSA DE OLIVEIRA FARIAS
DATE: 12/06/2023
TIME: 08:30
LOCAL: Prédio da PG do CECA/UFAL
TITLE:

AMINO ACIDS TO ATENUNATE PHYTOTOXICATION BY ALS-INHIBITING HERBICIDES IN SUGARCANE

KEY WORDS:

Phytotoxicity, safeners, amino acids.

PAGES: 61
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Matologia
SUMMARY:

The selectivity of herbicides has been widely studied in sugarcane cultivation, being fundamental for the success of chemical control. However, visual symptoms of phytointoxication can be observed after the application of some molecules, if they are applied outside the recommendation or if the environment provides great availability for the culture. In this context, products known as safeners or phytoprotectors prevent damage and increase crop selectivity, preserving the herbicidal action of the product on weeds; and the exogenous supply of amino acids may be able to reverse symptoms of phytointoxication. Thus, the present work aimed to attenuate intoxication by ALS-inhibiting herbicides, with the application of amino acids in sugarcane. The experiment was conducted at the Center for Engineering and Agricultural Sciences at the Federal University of Alagoas (CECA/UFAL), located in Rio Largo – AL. The sugarcane variety chosen was RB92579, planted in pots with a capacity of 20 L of soil. To evaluate the effect of herbicides, the trial was initially conducted in a completely randomized design, where the following herbicides were used: imazapic (147 g ha^-1), diclosulam (194, 04 g ha^-1), metsulfuron-methyl (18 g ha^-1), imazapic + s-metolachlor (147 g ha^-1 + 2880 g ha^-1), diclosulam + s-metolachlor (194,04 g ha^-1 + 2880 g ha^-1), metsulfuron-methylyl + s-metolachlor (18 g ha^-1 + 2880 g ha^-1) and the controls without herbicide, with 8 replications, totaling 56 experimental plots, with herbicide application modality in total pre-emergence. The application of the amino acid mix was carried out at 65, 95 and 125 days after the application of the herbicide treatments, applying 2 L/ha^-1 of the commercial product Kymon plus^®. After application of the amino acid, the study was conducted in 2x7 factorial assays, consisting of 2 conditions (with amino acids and without amino acids) x 7 herbicides, with 4 replications. The evaluated variables were: height to leaf +1, number of green leaves, stem diameter and phytotoxicity scale at 45, 75, 105, 135, 165, 195 and 225 DAA. At the end of the experiment, the dry mass of leaves and stems were evaluated. After regrowth at 30 days, the number of tillers and height up to leaf +1 were evaluated. The data obtained were subjected to analysis of variance and means compared by Tukey's test at 5% probability, using the SISVAR software. The obtained results demonstrated that the exogenous application of amino acids at 65, 95 and 125 days after the treatments application, does not attenuate phytointoxication by ALS-inhibiting herbicides in sugarcane.

BANKING MEMBERS:
Presidente - 2073816 - RENAN CANTALICE DE SOUZA
Interno(a) - 1790454 - GUILHERME BASTOS LYRA
Interno(a) - 1347716 - VILMA MARQUES FERREIRA
Externo(a) ao Programa - 1995312 - LUAN DANILO FERREIRA DE ANDRADE MELO
Externo(a) à Instituição - ANDERSON CARLOS MARAFON - UFPel