Shown for each growth stage
The Enlish version is available online (digital) and book!
The book can be orderd by Roodbont Agricultiral Publishers http://www.roodbont.nl/en/bookshop/2_Agrarisch/188-580_Tulip-Diseases
In the book Tulip Diseases, you will become familiar with all the diseases, disorders, and infestations that I have encountered in my role as a consultant during recent decades. My intention with this book is to offer a modern reference for everyone involved in bulb growing, tulip forcing, or planting parks and/or gardens.
I must congratulate you on this book. I think it is very good. It is good to have updated information and pictures.