The New Zealand Plant Conservation Network

When is TuTu at its most poisonous time of the year and most likely time for Bees to take it back to the hive.

This gives some details. Commercial apiarists seem to very aware of the problem and are audited, but I'm not sure about the smaller beepers who sell surplus. The toxins are very nasty and even if the affected person recovers they may be unable to drive for 1 year if any fit they had was in the daytime. ttp://http://www.terrain.net.nz/friends-of-te-henui-group/plants-toxic-if-eaten-by-man.html

I have been doing some research on this topic recently. Because the bees collect honey dew excreted by passionvine hoppers on tutu the most likely season when bees will be collecting tutin infused honeydew is during a drought when there is little rain or dew to wash away the honeydew. Also, their honey is extracted and combined, which dilutes any tutin. Commercial beekeepers in Whanganui, Waikanae and Reikorangi have never had tutin detected in their honey, and all of their honey is tested. However, with comb honey there are problems because there could be small pockets of tutin infused honey in some parts of the comb. Don't eat comb honey that was collected in the dry season when passionvine hoppers are active.