sorry, this list is definitely incomplete, it is hard to keep up with events.
Brazil Insetec 2019, Congreso Brasileño de Insectos, Monte Claros (November 6-8 2019), Brazil
Insectinov 2019, 26, 27, 28 november 2019, Biocitech Romainville-Grand Paris, France.
Insects As Food and Feed meeting 2020 21-22 April 2020, Natural History Museum, London, UK
Zimbabwe, the First African Conference on Edible Insects. 14-16 August 2019, Harare.
Belgium EAAP Annual Meeting (Ghent, Belgium, 29-20 August 2019), as there will be a number of speeches on insects (feed, food, farming, processing, etc).