Influence of mineral salts upon activity of Trichoderma harzianum non-volatile metabolites on Armillaria spp. rhizomorphs

Abstract

Effect of non-volatile metabolites of Trichoderma harzianum together with certain salts containing Mg ++ , Fe +++ , Mn ++ , Cu ++ , Al +++ , Ca ++ , K ++ , Na + , PO 4 ---and SO 3 ---on the production and length of rhizomorphs of Armillaria borealis, A. gallica and A. ostoyae was studied. In pure medium, T. harzianum exhibited stimulating effect on rhizomorphs of A. borealis (both number and length) and A. ostoyae (only initiation).Cu ++ salt totaly inhibited the initiation of rhizomorphs of Armillaria borealis, A. gallica and A. ostoyae. Effect of other compounds on the activity of T. harzianum depended on Armillaria species. The majority of chemical compounds tested supressed the activity of non-volatile metabolites of T. harzianum. Evident stimulating effect was observed under influence of sulphate salts consisting Al ++ and Fe +++ on the rhizomorph number of A. borealis and A. gallica, respectively.

Epidemiology, Biotic Interactions and Biological Control of Armillarioids in the Northern Hemisphere

“…The non-volatile metabolites of T. harzianum in combination with sulphate salts of Al 2+ and Fe 3+ reduced the number of rhizomorphs of A. borealis and A. gallica , respectively [ 316 ] and thus may be tested for a future integrated strategy.…”