Meripilus giganteus on beech tree treated with Trichoderma

beech tree in Stadtpark St. Gallen, 100 to 120 years old

beech tree with dieback in the crown

fruiting body meripilus giganteus, beginning of august 2017

Meripilus giganteus before treatment mid of august 2017

after treatment with Avengelus F Gel

after treatment with Avengelus F Gel

after treatment with Avengelus F Gel. Note the green Trichoderma spores at the border area.

Note rapid colonisation by T. harzianum and subsequent deterioration of the fruiting bodies.


Our research demonstrate the high antagonistic potential of Trichoderma isolates against wood decay fungi in laboratory and field studies. A rigorous screening process, the selection of a suitable carrier substance for spores and the production of customized antagonist is essential for successful application. We have been conducting field studies with Trichoderma isolates for many years now and have successfully treated trees colonised by pathogens such as Armillaria spp., M. giganteus and Phellinus noxius (in Australia, Singapore and Hong Kong). On the other hand, the results are not really surprising, as we are simply increasing the microbial activity by adding antagonists to soils with a poor microbial activity.