Efektivitas Insektisida Nabati Ekstrak Tanaman Lantana camara, Myristica fragrans, dan Barringtonia asiatica terhadap Mortalitas Larva Plutella xylostella pada Tanaman Kubis

Increased vegetable production, especially cabbage (Brassica oleracea), in Indonesia requires effective and environmentally friendly pest management strategies. Plutella xylostella L. (Lepidoptera: Plutellidae) is a key pest capable of causing up to 90% yield loss. This study aimed to evaluate the effectiveness of botanical insecticides derived from Lantana camara leaf extract, Myristica fragrans seed extract, and Barringtonia asiatica seed extract in controlling P. xylostella larvae at a 15% concentration. The study was conducted using a Completely Randomized Design (CRD) with four treatments and three replications at a cabbage plantation in Tataaran Patar Village, South Tondano District, Minahasa Regency, from July to November 2025. Observations were carried out weekly for five weeks, recording larval mortality. Results showed that all three botanical extracts significantly affected larval mortality compared to the control. The highest mortality was recorded in the Barringtonia asiatica extract treatment at 87.07%, followed by Lantana camara at 78.09%, Myristica fragrans at 74.44%, and the control at 22.55%. These findings confirm that all three botanical insecticides at 15% concentration are effective in suppressing P. xylostella larval activity and can be developed as environmentally safe alternatives to synthetic pesticides.