Research to Fungicide Sensitivity of Colletotrichum spp. Isolated from Apple Fruits in Cheongsong, Korea

Apple grower in the Cheongsong region, Korea has reported increased loss of apple yield due to severe bitter rot incidence. We noticed that this indience is because <i>Colletotrichum</i> population developed resistance commonly used fungicides. isolated 39 isolates from 13 orchards Cheongsong, and all species were identified as <i>C. siamense</i> or fructicola</i>. These strains tested for mycelial growth conidial germination against 12 trifloxystrobin (30–55% recommended concentrations) was shown lower inhibitory effect on growth. However, inhibition higher than (62–100%). Kresoxim-methyl (29–55%). 51% 96%. dithianon diversity response (43–100%). tebuconazole high (84–100%) be 64 100%. metconazole been found display with (79–100%) (70–80%). fluazinam possess (87–100%) (94–100%). This study provides basic information effective management rot.