Hydrolyzes intracellular trehalose to glucose (PubMed:16946258). The disaccharide trehalose serves as a storage carbohydrate that is mobilized during conidial germination (PubMed:16946258). Regulates the level of trehalose as a protectant for cell integrity (PubMed:16946258). alpha,alpha-trehalose + H2O = alpha-D-glucose + beta-D-glucose Carbohydrate degradation. Increases cellular trehalose levels (PubMed:16946258). Decreases conidial germination frequency (PubMed:16946258). Resistance to thermal stress (PubMed:16946258). Belongs to the glycosyl hydrolase 37 family.