Hi: Here is some useful link:

https://research.cip.cgiar.org/confluence/display/GILBWEB/Social+Impact+and+Economic+Importance+of+Late+Blight

https://www.jstor.org/stable/25564576?seq=1#page_scan_tab_contents

http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS-09-11-0752

http://www.extension.uidaho.edu/impacts/Pdf_11/31-11pwharton-lblight.pdf

https://research.cip.cgiar.org/typo3/web/fileadmin/Pdfs_Archive/09sengoo.pdf

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.501.4898&rep=rep1&type=pdf

http://www.ct.gov/caes/lib/caes/documents/publications/fact_sheets/plant_pathology_and_ecology/late_blight_of_tomato_and_potato_in_connecticut_06-25-14_r.pdf

we have only survey data (published ) that show how much losses of the yield in India.

Thank you everyone, i am looking more for a global loss estimate