Design of nanoemulsion of Tephrosia vogelii extract as botanical insecticide to control cabbage pest

Abstract

Nanoemulsion is a technology that can improve the performance of botanical insecticides. Nanoemulsion can increase the stability of active substances, prevent the decomposition of active ingredients by microorganisms, allows to activate ingredients directly on the target site, which aims to reduce damage. This research was conducted at the Sumatra Biota Laboratory, Faculty of Pharmacy and Insect Bioecology Laboratory, Faculty of Agriculture, Andalas University, Padang, from June to August 2018. The purpose of this research was to obtain T. vogelii formulations in the form of nanoparticles using spontaneous emulsification as a botanical insecticide that can control cabbage pests of Crocidolomia pavonana larvae. The result of this research showed the particle size nanoemulsion of formula A is 206.7 (nm) formula B is 432.6 (nm). The distribution of formula A nanoemulsion particles are classified as polydispersion, and Formula B is monodispersed. Mortality larvae instar 2 C. Pavonana in both formulas showed good results, namely >50%. This shows that nanoemulsion T. vogelii is very effective for controlling C. pavonana cabbage pests.