Trichoderma will not control aflatoxins. These are produced by fungi, to control the toxin, the fungi have to be controlled. Try DSC Lab 0128020940 Prof PL Steyn

I agree with Anette's comment. Also, control of Aflatoxin producing fungi is the only way. You have not said what the scenario is - is the biocontrol you are trying to achieve in stored grain or stored nuts or in field crops? Past work we did (1980's) proved controlling moisture is the best way, or temperature, which is often not possible, of preventing the production of any mycotoxins by the fungi.

-Generally you can get many isolates of the bio-agent Trichoderma from the soil, rhizosphere and rhizoplane of many plants. But i am in agreement with the two previous comments ( Anette and Tony) .

Dear Annette, Tony and Th. I apologise for lack of clarity in the question that was raised hurriedly and do agree with all of you. Trichoderma reveals antibiosis when cultured together with Aspergillus spp. and I am looking to test commercially available strains of Trichoderma for management of Aspergillus with intention to manage toxin production. One of the challenges of using Trichoderma as a bio-control is inevitably ensuring that there will be adequate supply of the bio-agent, and thus best supplied commercially rather than trying to isolate. I recently (after this message) came across a group in South Africa and checking to see if I can access this. However, I would also be grateful for protocol for isolating Trichoderma from the rhizosphere/ soil. Thanks for getting back.