Showing papers on "Trichoderma harzianum published in 1977"
TL;DR: Dominant fungi which displayed best competitive tolerance to the staling products of culture filtrates were Aspergillus flavus, A. niger and Trichoderma harzianum.
Abstract: Experiments were made on the nature of fungal competition on sal leaf-litter with emphasis on the antibiotic action of culture filtrates. The culture filtrates of Mortierella subtilissima, Aspergillus candidus, A. flavus, A. niger, Penicillium rubrum, Papulaspora sp., Staphylococcus aureus and Bacillus subtilis were found most effective in suppressing the growth of various leaf-litter fungi. Dominant fungi which displayed best competitive tolerance to the staling products of culture filtrates were Aspergillus flavus, A. niger, A. sclerotiorum, A. terreus and Trichoderma harzianum.
7 citations
TL;DR: Effects of Trichoderma harzianum and T. polysporum on chlamydospore production by two isolates of Phytophthora cinamomi were determined over a 21-day period in nonsterile, sterilized, and sterilized amended soil.
Abstract: Effects of Trichoderma harzianum and T. polysporum on chlamydospore production by two isolates of Phytophthora cinamomi were determined over a 21-day period in nonsterile, sterilized, and sterilized amended soil. Trichoderma was either coinoculated with P. cinnamomi or added to the cultures on day 3 of the incubation period. In nonsterile soil, conversion of mycelial fragments in the P. cinnamomi inoculum to chlamydospores resulted in an initial slight increase in chlamydospore numbers. In cultures where either of the Trichoderma isolates was added on day 3, a significiant reduction in chlamydospore numbers was observed on day 4; however, neither of the Trichoderma isolates at either inoculation time significantly affected clamydospore numbers by day 21. Results from studies with sterilized amended soil indicated that a reduction in P. cinnamomi chlamydospore numbers by either of the Trichoderma isolates was dependent upon availability of simple carbohydrates. In sterilized nonamended soil, the number of chlamydospores was increased in cultures containing either Trichoderma isolate; in sterilized amended soil chlamydospore numbers were initially reduced, followed by a general increase as the nutrients were depleted. Neither of the Trichoderma isolates exhibited significant antagonistic qualities toward P. cinnamomi.
6 citations
TL;DR: In this article, the fungus was identified by the Commonwealth Mycological Institute, Kew, with whom a reference culture has been registered, and experiments indicated that its growth resulted from the biodegradation of the gas oil.
5 citations