HIVE OF INDUSTRY: Neil Farrer with a frame of honeycomb.PHOTO/FILE NFA-200812WCBRCBE01
HIVE OF INDUSTRY: Neil Farrer with a frame of honeycomb.PHOTO/FILE NFA-200812WCBRCBE01
A new insect pest has been breeding up the wasps and threatening the survival of bees, beekeeper Rob Butcher says.
Giant willow aphids have been in New Zealand for about two years. They were first noticed in Auckland in 2013, but were already widespread.
The spotted grey insects can be6mm long, larger than most aphids. They suck sap out of the stems and young branches of willow trees, and some poplars, which can kill the trees.
They also exude honeydew. Bees eating it produce honey that is impossible to extract. The honeydew also attracts wasps and builds up numbers. When it is gone, the wasps attack bees, and can wipe out hives.
"At the moment most beekeepers are only just becoming aware of how bad the problem is," Wanganui Beekeepers' Club secretary Neil Farrer said.
It was a hot topic at a National Beekeepers' Association meeting he attended on Monday.
The problem was especially hard on people with five to 50 hives wintering near willow trees. Mr Farrer was told wasps had reduced a Hawke's Bay man's 100 hives to 40.
Rob Butcher has been keeping bees for 50 years and fears the aphids will harm conservation as well as the bee industry. He had always had wasp problems, but never the "ruthless destruction" of this season.