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Open AccessArticle

Development of a Solid Bioherbicide Formulation by Spray Drying Technology

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Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
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Biomonte SA, St. Appel, 472, room 401, Santa Maria RS 97015-030, Brazil
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Department of Biology, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria RS 97105-900, Brazil
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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
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Author to whom correspondence should be addressed.
Agriculture 2020, 10(6), 215; https://doi.org/10.3390/agriculture10060215
Received: 30 April 2020 / Revised: 22 May 2020 / Accepted: 5 June 2020 / Published: 9 June 2020
(This article belongs to the Special Issue Secondary Metabolites in Plant-Microbe Interactions)
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. View Full-Text
Keywords: Diaporthe sp.; antioxidant enzymes; natural herbicide; bioproducts Diaporthe sp.; antioxidant enzymes; natural herbicide; bioproducts
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de Almeida, T.C.; Spannemberg, S.S.; Brun, T.; Schmaltz, S.; Escobar, O.; Sanchotene, D.M.; Dornelles, S.H.B.; Zabot, G.L.; Tres, M.V.; Kuhn, R.C.; Mazutti, M.A. Development of a Solid Bioherbicide Formulation by Spray Drying Technology. Agriculture 2020, 10, 215.

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