Development of a Solid Bioherbicide Formulation by Spray Drying Technology

Thiago C. de Almeida, Stefani S. Spannemberg, Thiarles Brun, Silvana Schmaltz, Otávio Escobar, Danie M. Sanchotene, Sylvio H. B. Dornelles, Giovani L. Zabot, Marcus V. Tres, Raquel C. Kuhn and Marcio A. Mazutti
Additional contact information
Thiago C. de Almeida: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
Stefani S. Spannemberg: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
Thiarles Brun: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
Silvana Schmaltz: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
Otávio Escobar: Biomonte SA, St. Appel, 472, room 401, Santa Maria RS 97015-030, Brazil
Danie M. Sanchotene: Biomonte SA, St. Appel, 472, room 401, Santa Maria RS 97015-030, Brazil
Sylvio H. B. Dornelles: Department of Biology, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
Giovani L. Zabot: Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro St., Center DC, Cachoeira do Sul RS 96508-010, Brazil
Marcus V. Tres: Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro St., Center DC, Cachoeira do Sul RS 96508-010, Brazil
Raquel C. Kuhn: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
Marcio A. Mazutti: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil

Agriculture, 2020, vol. 10, issue 6, 1-11

Abstract: This study aimed to compare the herbicidal activity of solid formulas obtained by spray drying with conventional liquid formulas containing biomolecules produced by submerged cultivation of the fungus Diaporthe sp. in a stirred-tank bioreactor. The solid formula presented the highest phytotoxicity on plant control (96.7%) and the phytotoxicity was directly related to the concentration of fermented broth in the formula. The use of adjuvant improved the efficiency of the bioherbicide. Dry matters of treatments were lower than the control and this was correlated with an increase in oxidative stress, since the activity of the antioxidant enzymes such as superoxide dismutase and guaiacol peroxidase increased in the treatment with a high level of phytotoxicity. Spray drying technology is a promising tool to concentrate bioherbicide without the loss of bioactive compounds since one of the major challenges in the production of bioherbicides is the low concentration of active ingredients in the fermented broth.

Keywords: Diaporthe sp.; antioxidant enzymes; natural herbicide; bioproducts (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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