<![CDATA[Abstrak: Demam Berdarah Dengue (DBD) masih menjadi masalah kesehatan serius di Indonesia, khususnya di lingkungan pesantren. Salah satu upaya preventif adalah pemanfaatan insektisida nabati berbahan alami seperti tapak dara (Catharanthus roseus L.) yang mengandung sitronellol dan geraniol sebagai senyawa repelan. Program pengabdian ini bertujuan meningkatkan pemahaman dan keterampilan santri pondok pesantren di Bojonegoro, dalam pembuatan spray antinyamuk herbal. Kegiatan diikuti oleh 40 santri putri melalui tahapan sosialisasi, ceramah, diskusi interaktif, dan praktik langsung. Evaluasi pengetahuan dilakukan dengan pretest–posttest dengan masing-masing 10 pertanyaan, sedangkan keterampilan diamati langsung oleh tim pengabdian. Hasil menunjukkan peningkatan signifikan pada aspek pemahaman yakni 90% peserta mencapai kategori sangat baik setelah sosialisasi. Pada aspek keterampilan yakni 82,5% peserta mampu meracik spray antinyamuk secara mandiri sesuai prosedur.Abstract: Dengue Hemorrhagic Fever (DHF) remains a major public health problem in Indonesia, particularly in Islamic boarding schools. One preventive effort is the use of botanical insecticides derived from natural plants such as periwinkle (Catharanthus roseus L.), which contains citronellol and geraniol as repellent compounds. This community service program aimed to enhance the knowledge and skills of students at Islamic Boarding School, Bojonegoro, in producing herbal mosquito repellent spray. The program involved 40 female students through stages of socialization, lectures, interactive discussions, and hands-on practice. Knowledge evaluation was conducted using pretest–posttest with 10 questions each, while skills were assessed through direct observation. Results indicated a significant improvement in knowledge (soft skills), with 90% of participants achieving an excellent category after the training. Meanwhile, 82.5% of participants demonstrated the ability to independently formulate and package mosquito repellent spray according to procedures.]]>
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