You are downloading the Plant Diseases AppXBundle file v2017.812.1659.0 for Windows Phone. Plant Diseases is a free Books & Reference App: The appendix contains a description of plant diseases. As implemented in the application easy. You can now download the offline AppXBundle package file to install & try it.
Download Locations for Plant Diseases 2017.812.1659.0 AppXBundle file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Plant Diseases AppXBundle file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.