[1] According to Google Scholar, he has since then published more than 150 scientific papers and book chapters on fungal pathogens of plants, animals and insects, and on the reactions of hosts to infection.

[12] Other interests include fungal and insect behavior and evolution,[13] molecular biology and genomics of fungi,[14] and mutualistic associations between microbes and plants that can be exploited to benefit agriculture.

[21] St. Leger has tested an array of "alternative engineering strategies to be consistent with the highly exploratory approach required for optimizing a pathogens biocontrol potential".

[24] St. Leger is an advocate of online open education and since 2013 has co-taught with Dr. Tammatha O’Brien (https://tammatha.weebly.com/) a MOOC on the Coursera platform called Genes and the Human Condition [25] that has had more than 200,000 active learners.

St. Leger received an honorary doctorate from his alma mater of Exeter University in 2018 [27] and the Newcomb Cleveland Prize for the most impactful paper published in the journal Science in 2019.