Negative impact of some fungicide applications on Trichoderma harzianum as biocontrol agent of shallot moler disease

Abstract Chemical control is still a mainstay for some farmers in shallot center areas such as Brebes, Central Java. Applications of fungicides that are carried out these very intensive and periodically every 3-5 days. The application too can certainly have negative impact on functional microbes including biological disease agents. purpose this study was to evaluate the several brands efficacy T. harzianum agent red onion mole. Experiments were field laboratory. results experiment showed combined fungicide did not increase single application. While laboratory tests with doses inhibit growth colonies germination harzianum. Brand-B active ingredients Carbendazim 12% Mancozeb 63% colony 100%.