TrikoLogic S® ultimate root zone protection Professional quality Trichoderma with added hot weather protection. The ultimate in biological root zone protection and health GHE Trikologic S adds hot weather protection from Streptomyces negrecens to our standard biologicalprotection for your grow. On top of the growth boost and protection offered by Trichoderma, Streptomyces coats roots with a protective mycelium that physically prevents fusarium and pythium spores from infecting them. Trikologic S delivers all the benefits of additional nutrition and stimulation that standard Trikologic provides, but it also gives you what is genuinely the only reliable natural way of protecting your grow from root pathogens in hot and difficult conditions: well chosen, professional quality mycorrhizae.