Straw-herbicide interaction in no-tillage system: effects of pre-emergent herbicides on the control of slender amaranth

• Grant number: 21/03455-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2021
• End date: July 31, 2024
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Valdemar Luiz Tornisielo
• Grantee: Camila de Werk Pinácio
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated scholarship(s): 22/12221-0 - Metribuzin nanoformulations uptake and distribution in target plants in different soil system, BE.EP.IC

Abstract

Weeds are one of the problems that most cause losses to crops, so many efforts are made to decrease this potential for losses. With the pressure of herbicide overuse, often without the aid of other control methods, resistant plant biotypes have developed, culminating in decreased control effectiveness. Pre-emergent herbicides have become increasingly important in complementing the effectiveness of weed control. Furthermore, the no-till farming system with the use of straw mulches to cover the soil has proven to be an effective way to reduce the incidence of weed germination, but this is not true for all occasions. The objective of this project is to evaluate the effect of the interaction of black oat (Avena strigosa), rapeseed (Raphanus sativus), and buckwheat (Fagopyrum esculentum) straws with pre-emergence herbicides on the control of slender amaranth (Amaranthus Viridis), and to evaluate the weed control efficiency for each straw dosage and to observe how each cover species will affect the herbicides. For this, the herbicides diuron and diclosulam will be used, the design is entirely randomized in a 3x3 factorial scheme with four repetitions, in two groups of experiments. Each experimental group will have one of the herbicides, the weed, three types of straw, three amounts of straw (0, 2.5, and 5 t ha-1). The efficiency of each straw and its interaction with herbicide in the control of A. Viridis will be evaluated through the percentage of germination, dry mass (mg), and leaf area (%). Based on the data obtained, it is expected to verify the influence of herbicide interception caused by the straw and the interaction straw and herbicide in the control of slender amaranth. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

TAKESHITA, VANESSA; MUNHOZ-GARCIA, GUSTAVO VINICIOS; PINACIO, CAMILA WERK; CARDOSO, BRIAN CINTRA; NALIN, DANIEL; TORNISIELO, VALDEMAR LUIZ; FRACETO, LEONARDO FERNANDES. Availability of Metribuzin-Loaded Polymeric Nanoparticles in Different Soil Systems: An Important Study on the Development of Safe Nanoherbicides. PLANTS-BASEL, v. 11, n. 23, p. 17-pg., 2022-12-01. (22/00718-8, 19/04758-1, 17/21004-5, 21/03455-5, 22/01554-9)