Frass is known to feed micro-organisms. The bacteria in this study produce secondary metabolites with promote plant health.
This article is a little complicated, the take away is that chitinase triggers plant's self-defense mechinisms. Chitinase is an enzyme produced bacteria that eat chitin Frass provides a source of chitin.
Frass: Chitinase
Full article
https://www.science.org/doi/10.1126/science.aaw9285
Reference
(Carrion, et al. 2019)
Carrión, V. J., Perez-Jaramillo, J., Cordovez, V., Tracanna, V., De Hollander, M., Ruiz-Buck, D., Mendes, L. W., van Ijcken, W. F. J., Gomez-Exposito, R., Elsayed, S. S., Mohanraju, P., Arifah, A., van der Oost, J., Paulson, J. N., Mendes, R., van Wezel, G. P., Medema, M. H., & Raaijmakers, J. M. (2019). Pathogen-induced activation of disease-suppressive functions in the endophytic root microbiome. Science (American Association for the Advancement of Science), 366(6465), 606–612. https://doi.org/10.1126/science.aaw9285
This article is open source, so hopefully I haven't made any IP infringements.
