In vitro sensitivity of anthracnose disease agent, Colletotrichum gloeosporioides (Penz.) Penz. & Sacc., to some fungicides on lemon

Anthracnose is one of the diseases that seriously threaten citrus production, especially lemons in the world and in our country. The aim of this study was to determine the sensitivity of an anthracnose disease agent, Colletotrichum gloeosporioides, on lemon, to some fungicides with different mechanisms of action from different chemical groups such as DMI, SDHI, QoI, amides, anilines and dithiocarbamates. For this purpose, tissue pieces of diseased plants collected from lemon orchards were incubated in PDA medium at 25 °C for 5 days. All isolates were identified as Colletotrichum gloeosporioides as a result of morphological and molecular diagnoses of fungal cultures. The virulence levels of all isolates were determined in pathogenicity tests and the highest virulence was found to have LC5 isolate. The susceptibility of C. gloeosporioides LC5 isolate to 10 different fungicides was demonstrated by in vitro mycelial growth and conidial germination trials. As a result, it was determined that fungicides fluopyram+tebuconazole, fluazinam, fluxapyroxad+ difenoconazole and dithianon+phosphorous acid showed the highest effect