The Western Blot picture is from the article in link below. However, It does not mention how the product is diluted:
https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0026032&type=printable
Below are links to articles that have cited this antibody in Western Blot. Various dilutions are used. The end-user may titrate the product to find the best dilution for their application. The end-user may try something like 1:1000, 1:5000, 1:10,000, 1:20,000, etc.:
https://www.scielo.br/j/jaos/a/pBt9nVwJydK6Qz3qwMrNLrc/?lang=en
https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2020.612781/full