Interesting writings of Ira J Condit available on the Internet may provide useful knowledge to all interested in growing figs and to answer to most of their today's questions.

This is 'Circular 77' he wrote in 1933.
https://books.google.pt/books?id=Hl8VAwAAQBAJ&pg=PA1&lpg=PA4&ots=6q8YT7qYo7&focus=viewport&dq=Gasparrini+and+the+fig+wasp&hl=pt-PT

Another interesting book of the same author can be easily found on the Internet (free) 
Caprifigs and Caprification. University of California Press, 1922

Francisco
Portugal

Thanks Francisco this is a very useful reference!

For those interested in old texts relating to figs, here are two more that I enjoy.

Condit, I.J. 1927. The Kadota fig

https://archive.org/details/kadotafig4364365cond

Clark, W. Sam. 1920. The Kadota Fig a Treatise.

Thanks for the info. guys !

Interesting links, I didnt know how to sulfur my figs now I do.  I also need a 3' x 4' iron pot to boil the ingredients to control scale. apparently 100 years ago figs were a big farm item.  Sometime when I have a lot more time ill read them all.