Fungi Colletotrichum sp. merupakan salah satu fungi patogen penyebab penyakit antraknosa cabai. Pengendalian Colletotrichum sp. biasanya menggunakan fungisida, namun penggunaan fungisida dalam jangka panjang menimbulkan dampak negatif bagi lingkungan, sehingga diperlukan alternatif biofungisida yang ramah lingkungan. Salah satu alternatif yaitu menggunakan biofungisida dari tanaman sirih dan bawang putih. Penelitian ini bertujuan untuk mengetahui dan menganalisis kemampuan ekstrak daun sirih dan bawang putih dalam menghambat pertumbuhan fungi Colletotrichum sp., karena kandungan senyawa di dalam daun sirih dan bawang putih dari beberapa referensi berfungsi sebagai antifungi yang sangat baik. Hasil isolasi dari cabai terserang antraknosa didapatkan 6 isolat fungi dan salah satunya memiliki ciri-ciri seperti fungi genus Colletotrichum sp.. Hasil penelitian ekstrak daun sirih dan bawang putih terhadap Colletotrichum sp. yang telah diidentifikasi menunjukkan bahwa ekstrak daun sirih dan bawang putih berpengaruh terhadap pertumbuhan diameter fungi, luasan miselium fungi, dan daya hambat terhadap pertumbuhan fungi. Hasil analisis menunjukkan bahwa perlakuan dengan konsentrasi tertinggi lebih efektif daripada pestisida sintetik dengan nilai pertumbuhan diameter sebesar 1,69 cm, luasan miselium sebesar 0,70 cm2, dan daya hambat tertinggi sebesar 54,03%.

ABSTRACT:
Fungi Colletotrichum sp. is one of the pathogenic fungi that causes chili anthracnose. Control of Colletotrichum sp. usually use fungicides, but the use of fungicides in the long term has a negative impact on the environment, so an environmentally friendly alternative biofungicide is needed. One alternative is to use biofungicides from betel and garlic plants. This study aims to determine and analyze the ability of betel leaf extract and garlic to inhibit the growth of the fungus Colletotrichum sp., because the compounds contained in betel leaf and garlic from several references function as excellent antifungals. The results of isolation from chilies attacked by anthracnose were obtained 6 isolates of fungi and one of them had characteristics such as fungi of the genus Colletotrichum sp.. The results of the research of betel leaf extract and garlic against Colletotrichum sp. which have been identified indicate that betel leaf extract and garlic affect the growth of fungal diameter, fungal mycelium area, and inhibition of fungal growth. The results of the analysis showed that the treatment with the highest concentration was more effective than synthetic pesticides with a diameter growth value of 1.69 cm, a mycelium area of 0.70 cm2, and the highest inhibitory power of 54.03%.