Diseases and other problems:
http://barbolian.com/whats-wrong-with-my-garlic/
http://garlicaustralia.asn.au/sites/default/files/Pests%20and%20Diseases%20of%20Garlic_Albury.pdf

General Growing Information:
https://www.dpi.nsw.gov.au/__data/assets/pdf_file/0005/97709/growing-garlic-in-NSW.pdf