Banca de QUALIFICAÇÃO: ANA CAROLINA OLIVEIRA CHAPETA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : ANA CAROLINA OLIVEIRA CHAPETA
DATE: 13/03/2023
TIME: 08:30
LOCAL: Sala 4 - IA/DFITO
TITLE:

MAPPING THE RESISTANCE OF SPECIES OF THE GENUS Amaranthus IN SOYBEAN PRODUCTION AREAS

KEY WORDS:

resistance; chemical control; caruru

PAGES: 20
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Matologia
SUMMARY:

Periodic monitoring of the dispersal of weed species is one of the ways to prevent the spread of resistant biotypes. As is the case of caruru, with several species reported as resistant to the herbicide glyphosate, which has made its management difficult in the field. The objective of this work is to map the dispersion of glyphosate resistant caruru populations, propose management alternatives, identify and characterize the different resistant species found in soybean producing areas in Brazil. The experiments will be conducted at the Federal Rural University of Rio de Janeiro – Seropédica/RJ, in a greenhouse in the experimental area of the research group on Weeds and Pesticides in the Environment - PDPA. The samples of caruru seeds will be collected by the company in the field by partners, in areas with escapes from the application of the glyphosate herbicide. The first experiment will be conducted with all biotypes collected in the field, in a stage of 6 fully expanded leaves. The herbicide glyphosate (2.5L ha-1) will be applied for a first screening of herbicide survival. From the surviving biotypes, seeds will be collected for the next generation (F2). With these biotypes, a dose-response curve test will be performed, always in comparison with a known susceptible control of the same species, where the treatments will be the doses of the herbicide glyphosate: 6D, 4D, 2D, D, 1/2D, 1/4D 1/6D and witness without application. Dose D corresponds to 2.5L ha-1 of glyphosate herbicide. With these biotypes, an assay will be conducted with the following herbicides: cloransulam (47.6g ha-1), chlorimuron (20g ha-1), bentazone (1.2L ha-1), flumioxazin (100g ha-1), diclosulam (41 ,7g ha-1), to evaluate possible alternatives for their control in the field. Of all the biotypes used in the research with resistance to glyphosate, the description and anatomical characterization of the species will be made and the production of specimens documenting the variability of the plants as well as the regions (plotted on a map) of the materials studied in the research.

COMMITTEE MEMBERS:
Presidente - 2466219 - CAMILA FERREIRA DE PINHO
Interno - 1905333 - AROLDO FERREIRA LOPES MACHADO
Externo ao Programa - 3058137 - LUIZ RICARDO DOS SANTOS TOZIN - UFRRJExterna à Instituição - CRISTINA MOLL HUTHER - UFF