Plant diseases caused by pathogenic fungi are one type of disease that attacks cultivated plants. This study aims to test the activity of Trichoderma spp. local isolates of Riau against pathogenic fungi Ganoderma boninense and Colletotrichum spp. the Colletotrichum spp. isolation were taken from Capsiccum annuum fruit and Sansevieria trifasciata leaves with symptoms of anthracnose disease. The …