Tanaman yang berpotensi sebagai antibakteri sangat banyak dijumpai di pekarangan rumah misalnya Catharanthus roseus dan Polygala paniculata L. Kombinasi kedua tanaman tersebut dilakukan untuk mengetahui potensi kombinasi ekstrak daun Catharanthus roseus dengan akar Polygala paniculata L. terhadap pertumbuhan bakteri patogen serta menghasilkan produk berupa buku referensi yang layak digunakan. Jenis penelitian ini yaitu Research and Development (R&D) sedangkan pengamatan aktivitas antibakteri melalui metode sumuran dengan perlakuan konsentrasi yaitu 20%, 40%, 60%, 80%, dan 100%. Kombinasi ektstrak tanaman dapat menghambat pertumbuhan bakteri Escherichia coli (ATCC 8739) dan Staphylococcus aureus (ATCC 8739) Diameter zona hambat pertumbuhan E.coli yang tertinggi yaitu 17,5 mm (daya hambat sangat kuat) pada konsentrasi 80% sedangkan daya hambat pertumbuhan S. aureus yang tertinggi yaitu 15, 25 mm( daya hambat sangat kuat) pada konsentrasi 100%. Kelayakan produk berupa buku referensi berdasarkan ahli media sbesar 75% (cukup layak), ahli materi 95% (sangat layak), praktisi sebesar 83,52% (sangat layak) sehingga dapat disimpulkan bahwa rata – rata persentase kelayakan buku referensi sebesar 85% (sangat layak). Selain itu hasil dari uji respon siswa sebesar 85,12% dalam kategori sangat menarik.

Potential antibacterial plants such as Catharanthus roseus and Polygala paniculata L.are very common in home yards. This study aimed to determine the potential extract combination of Catharanthus roseus and Polygala paniculata L. roots against the growth of pathogenic bacteria and to develop a suitable reference book. This was a Reseacrh and Development (R & D) study and observation of antibacterial activity was carried out through well diffussion method with concentration treatments of 20%, 40%, 60%, 80%, and 100%. The extracts combination were able to inhibit the growth of Escherichia coli (ATCC 8739) and Staphylococcus aureus (ATCC 6538). The highest diameter of inhibition zone of Escherichia coli (ATCC 8739) was 17,5 mm (very strong inhibitory) at a concentration of 80 % while the highest inhibitory growth rate of Staphylococcus aureus (ATCC 6538) was 15,25 mm (very strong inhibitory) at a concentration of 100%. The feasibility of the product in the form of a reference book was based on the assessment obtained from experts: 75% from media experts (quite feasible), 95% from material experts (very feasible), and 83,52% from practitioners (very feasible) The average percentage of the reference book eligibility was 85% (very feasible). In addition, 85,12% of student responses showed a category of very interesting.