When deer roam into the Horticultural Research Center at the University of Minnesota Arboretum and chew on the ends of tree branches, they can set fruit-breeding efforts back by years.
To help prevent deer from making a buffet out of the center's orchards, which are home to a flagship apple-breeding program, the arboretum is constructing fences on the property's northern boundary.
Over the three decades he has done research at the center, Jim Luby said he has seen the local deer population expand with the area's suburbs, which push out predators and provide ample sources of food.
"They can just go down a row of small trees and do a lot of damage," said Luby, director of the U's fruit crops breeding project. Some of the center's new fencing is going up on recently acquired land, he said.
The additional fencing is part of a continual effort to keep deer out of the gardens, plant collections, orchards, prairies and wetlands on the university property in Chanhassen.
The project is being paid for with capital campaign funds, said Peter Moe, director of operations at the arboretum. The two fences will cover about 7,000 feet and will cost $88,400, he said.
University researchers have bred apples, grapes and other fruits at the center for more than a century. In this time, they have produced 27 varieties of apples, including the popular Honeycrisp and SweeTango.
Deer cause trouble for researchers year-round by disrupting fruit growth, said apple breeder David Bedford. This prevents scientists from taking measurements and making crosses.