I have been sent a poster by Frank Visser produced by Catherine Hardiman
entitled: Ant toxin: A strategy for the indirect control of mealybug,
vector of Grapevine leafroll-associated virus type 3 (GLRaV-3).
This is attached
There is a thesis too of Catherine's study, with the same name, but I have failed to reduce it to a reasonable size. However, if you would like to see it, let me know (email@example.com) and I will forward the request to Frank.