This a report by Fundacion ANTAMA on the 15 years of experience cultivating Bt maize in Spain. Interesting report. You can find the report here:

Just as a side note, with some colleagues at the Program for Biosafety Systems, we were invited by Fundacion Antama and a group of corn producers near Zaragoza to visit their production sites with Bt maize. Its an impressive cultivation area. I was also quite impressed by the support given by producers to R&D efforts, in particular micro-irrigation technologies being tested and used in the area. First time I’ve seen the micro-iirigation technology being used in maize!!!