I'm a PhD student in microbiology and I work directly on farms. If this crisis had occurred during the practical phase of my project, I would have had to wait a year, maybe even two, before I could start the same study again, because it requires a complete experimental setup.
So it's very important that the research funding agencies also include this in their response to the crisis and that they are able to provide additional funding so that some students can graduate. Otherwise, it is like throwing away millions of dollars due to the crisis.