Plantix is a Crop Assistant Website and App that I have translated from English to Brazilian Portuguese. It has over 550 plant diseases that I have also translated. So, this is a huge and recurring project. 

Here is a link to the website: https://plantix.net/plant-disease/pt
And here is one to the App: https://play.google.com/store/apps/details?id=com.peat.GartenBank&hl=pt_BR