SYMPOSIA PAPER Published: 01 November 2022
STP164120210059

Protoporphyrinogen Oxidase (PPO) Inhibitor Oil Dispersion Formulation as an Ecofriendly All-in-One Option for Broadleaf Control

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Weed control using green-based products is mandatory for a sustainable agriculture. Saflufenacil is a protoporphyrinogen oxidase (PPO) inhibitor widely used for preplant control of broadleaf weeds, and it can be combined with other active ingredients, such as glyphosate, as a result of their synergistic effect in the field. Currently, the available commercial products are formulated as water-dispersible granules (WDGs) or aqueous suspension concentrates (SCs) and the application requires an oil-based tank mix adjuvant to ensure biological efficacy. In this scenario, an oil-dispersion (OD) formulation would represent an interesting option for enhancing sustainability of the system because it uses an all-in-one concept and removes the need for a tank mix adjuvant. On the other hand, oil dispersions are usually challenging to formulate and stabilize. In this work, we present a market-load saflufenacil OD formulation to replace both WDG and SC formulation systems applied with a tank mix adjuvant. Our solution delivers a higher rate of control of some broadleaves than current products, involves lower doses of chemicals applied on the field, and achieves a highly stable formulation through an easy process with few components. The project was carried out in four steps: (1) an extensive screening of components using an emulsion stability protocol for selection; (2) rheology profile studies; (3) a complete stability study according to the Collaborative International Pesticides Analytical Council (CIPAC) and Brazilian standards (Associação Brasileira de Normas Técnicas [ABNT]); and (4) biological efficacy trials in the greenhouse and field for control of Conyza spp., Ipomea spp., and other broadleaf species. The deliveries to be presented comprise a process to formulate in two simple steps an OD formulation with excellent stability and rheological profiles even in the absence of a thickener agent. Our saflufenacil OD formulation showed similar and superior performance in the control of Conyza spp. and Ipomea spp. weeds, respectively, compared to the benchmark protocol.

Author Information

Kfouri, Marta, Simão
Research and Development Crop Solutions, São Paulo, BR
da Silva, Cíntia, Fávaro
Research and Development Crop Solutions, São Paulo, BR
Gonçalves, Heloisa
Research and Development Crop Solutions, São Paulo, BR
Ferreira, Rafael Augusto, Alves
Research and Development Crop Solutions, São Paulo, BR
Celestrin, Vinicius de, Castro
Research and Development Crop Solutions, São Paulo, BR
Ramos Jr., Edson, Cardoso
Research and Development Crop Solutions, Hattiesburg, MS, US
Gonçalves, Augusto
Research and Development Crop Solutions, São Paulo, BR
Jordão, Amanda, M.
Research and Development Crop Solutions, São Paulo, BR
Mendonça, Bruna
Research and Development Crop Solutions, São Paulo, BR
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Details
Pages: 59–79
DOI: 10.1520/STP164120210059
ISBN-EB: 978-0-8031-7730-7
ISBN-13: 978-0-8031-7729-1