This study aims to determine the effectiveness of chitosan and basil leaves as repellent (anti-ant) and antibacterial products. This study was conducted with a Complete Random Design (RAL) using 3 repetitions and 4 levels of chitosan concentration, namely 0%, 0.5%, 1.0% and 1.5%. In this test, tests were carried out for simplicity yield, temperature, humidity, number of ants that swarmed the sa…