Nanoemulsion is a preparation consisting of an oil phase and a water phase with particle sizes in the range of 20-200 nm. The study aimed to obtain a mixed nanoemulsion from Piper aduncum fruit and Tephrosia vogelii leaves as an active botanical insecticide against larvae of Crocidolomia pavonana. Nanoemulsions were made using a low energy method, namely spontaneous emulsification using a magnetic stirrer and then followed by a toxicity test. The nanoemulsion toxicity test was carried out singly and in a mixture on C. pavonana larvae using the deep leaf method. The results showed that at the LC50 and LC95 nanoemulsion of mixture T. vogelii and P. aduncum extract was synergistic and showed higher activity than a single nanoemulsion of T. vogelii and P. aduncum.

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Nanoemulsion of S. pepper could control cabbage pests but optimization is needed for the composition because of low toxicity. The purpose of this research was to optimized composition of S. pepper nanoemulsion using citronella waste that increases stability and reduces the size of particle. The insecticidal activity was tested using the leaves residual method. The experimental design used a completely Randomized Design (CRD) which consisted of five concentration 0.10%, 0.16%, 0.27%, 0.45%, and 0.74% with five replications. The quality of nanoparticles was tested with PSA Zetasizer Nano ZS Malvern tools. The results show formula is classified as a nanoemulsion because it has a size of 104.2 nm. The particle size of this formula is smaller than in previous research using only one S. pepper extract. LC50 this formula is 0.41 and LC95 1,88. Based on the toxicity test formula can control 81,33% C. pavonana in the highest concentration but previous research only can be controlled 40.00 %.

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.

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