Use of Lignins from Sugarcane Bagasse for Assembling Microparticles Loaded with Azadirachta indica Extracts for Use as Neem-Based Organic Insecticides

Author(s)

Eveline S. Costa ^[1] ; Bruno Perlatti ^[2] ; Everton M. da Silva ^[3] ; Andreia P. Matos ^[4] ; Maria Fátima G. F. da Silva ^[5] ; João B. Fernandes ^[6] ; Vânia G. Zuin ; Caio M. P. da Silva ^[8] ; Moacir R. Forim ^[9]

Affiliation

^[1] Universidade Federal de São Carlos. Departamento de Química. Laboratório de Produtos Naturais - Brasil

^[2] Universidade Federal de São Carlos. Departamento de Química. Laboratório de Produtos Naturais - Brasil

^[3] Universidade Federal de São Carlos. Departamento de Química. Laboratório de Produtos Naturais - Brasil

^[4] Universidade Federal de São Carlos - Brasil

^[5] Universidade Federal de São Carlos. Departamento de Química. Laboratório de Produtos Naturais - Brasil

^[6] Universidade Federal de São Carlos. Departamento de Química. Laboratório de Produtos Naturais - Brasil

^[8] Universidade Federal de São Carlos. Departamento de Química - Brasil

^[9] Universidade Federal de São Carlos. Departamento de Química. Laboratório de Produtos Naturais - Brasil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 28, n. 1, p. 126-135, 2017-01-00.

Abstract

Microcapsules of sugarcane bagasse lignin loaded with organic extracts of neem (Azadirachta indica) were prepared and evaluated as potential bioinsecticides. Lignins were extracted and modified by oxidation and acetylation reactions providing different biopolymers. Afterwards, they were characterized through several analytical techniques. The formulations were initially prepared as colloidal suspension of lignin nanoparticles, which were then spray-dried. The products were submitted to quality control protocols using high performance liquid chromatography (HPLC), thermal and photochemical degradation studies, followed by biological assays against Spodoptera frugiperda and Diatraea saccharalis. The formulations showed increases in both thermal and photo stability of approximately 40% compared with control samples. All the formulated microparticles were efficient against the insects evaluated and required a shorter time to achieve 100% mortality than the controls. The use of sugarcane bagasse lignins to prepare microparticles improved the resistance of neem extracts against abiotic factors, retaining the biological activity of this biopesticide. (AU)

• FAPESP's process: 11/11860-5 - Phytochemical studies on plants from cerrado and their potential to control symbiont microorganisms of insect plague
• Grantee: Moacir Rossi Forim
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/00970-4 - Nano and micro particles from Meliaceae extracts for pest control using lignin from sugarcane
• Grantee: Eveline Soares Costa
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/50827-1 - From orange waste to chemicals: contributions of an integrated biorefinary approach towards sustainable development in Brazil
• Grantee: João Batista Fernandes
• Support Opportunities: Regular Research Grants