Weed control and selectivity herbicide to culture Physalis angulata

• Grant number: 17/07051-0
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): October 01, 2017
• Effective date (End): September 30, 2018
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal researcher: Pedro Luis da Costa Aguiar Alves
• Grantee: Leandro Aparecido Chiconi
• Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Physalis angulata is a plant from the Family Solanaceae, with small size, that has fruits of high commercial value. In Brazil, the commercial production of Physalis has increased as far as the cultivation technologies are developed. Amongst them, the control of weed plants become essential for the good development and the increasing of productivity. The chemical control of weed plants it's an important technology for the crops' management, but when it comes to the culture P. angulata there is no record of specific herbicides for it, being that too much of used herbicides are registered for others Solanaceae, how, for example, the tomato. Therefore, the objective of this work is to evaluate the selectivity of the herbicides with different mechanisms of action in the control of weed plants. The experiment will be conducted in two steps, the first one will be in vases with the purpose to select the herbicides with less phytotoxicity. The herbicides studied will be: fluazifoppbutil, metribuzim, fomesafen/fluazifoppbutil, trifluralina ecletodim with and without adjuvant, with a witness without application. After the results obtained in the first step, the herbicides that present selectivity will be used in the field experiment, to evaluate its effects in the growth and the productivity of the culture and the efficiency in the weed plants control. In both experiments will be performed evaluation of Phytotoxicity at 7, 14, 21, 28, 35 and 42 days after the application (DAA), assigning visual notes and will be determined the height of the plant, the diameter of the stem and the relative content of total chlorophyll, being that the 42 DAA will be determined the leaf area and dry biomass of plants. In the field experiment, on these occasions, will be evaluated the efficiency of herbicides control through visual notes and to the 90 DAA will be determined the productivity per plant and per area. The obtained data will be submitted to the analysis of variance by the F test, and the averages will be compared by the Tukey test in the probability level of 5%. (AU)