Yesterday Mr Genet and his crew moved in with a digger to clear the blackberry and expose the nests so they could be treated with a pesticide dust.
The resident who contacted the regional council said they had not seen wasps to this extent in the 13 years they had lived there.
"This is escalating and if it's not dealt with the problem could be doubled next year."
Hawke's Bay Fly Free pest controller Owen Rees says he gets called out to about 100 or so nest sites each year, but agreed the problem was worse this year.
"All the ripened and rotting fruit that's around this year may be contributing to it, but they are also found in roof and wall cavities, under houses, in the ground and in trees."
Although it was bad this year, he faced one of the worst scenarios he had seen last year,
when he was called to house where wasps had eaten through the ceiling in the middle of the night and fell into a young girl's bedroom.
"It was a like a horror movie."
He's also been to houses where walls were being held up only by the paintwork, with wasps having eaten through the walls and gib.
He says two out of 10 calls he gets are from people who have unsuccessfully tried to treat the problem themselves.
While he uses an industrial product, people can have a go themselves with products that can be purchased from Farmlands.
Last month a swarm of wasps attacked a 60-year-old man in Porangahau after he accidentally chainsawed through a wasp nest.
He went into anaphylactic shock and was airlifted to Hawke's Bay Hospital. He was discharged soon after.