THE DALLES, Ore. — A grower, former fieldman and promoter of dwarfing cherry trees for more than two decades says more growers should adopt an Australian tree system to cut labor costs in half and grow large, top-quality cherries.
John Morton, 70, is bullish on the KGB. No, he’s not talking about Russians, but a goblet-style cherry tree developed in 1993 by Australian grower Kym Green. It is a takeoff of the Spanish Bush cherry tree — hence the Kym Green Bush, or KGB. It’s pedestrian, meaning it is harvested from the ground without ladders.
“The brine industry was the bulk of the cherry industry in Oregon in the early 1990s and prices were collapsing. We had a lot of old Bing and Royal Anns,” says Morton, an Oregon Cherry Growers fieldman from 1992 to 2009 and a grower since 2000.
Part of the problem was a labor shortage. The Dalles has a harder time attracting and keeping pickers since there were few pears and apples to extend picking after cherries, he said.
Looking for answers, the industry helped send Lynn Long, an Oregon State University Extension agent in The Dalles, to Europe in 1994.
“Europe was having the same problems of labor shortages and Lynn came back and reported on dwarfing cherry rootstocks that we didn’t know existed,” Morton said.
The next year, Morton headed a tour of 25 Cherry Growers members to Europe and saw smaller trees were easier to pick and resulted in higher picker production. They met Tobias Vogel, a German grower and extension agent, who developed the Vogel Spindle, a central leader dwarfing tree.
In 1997, Morton met Green at an international cherry symposium in Norway and learned about the KGB.
“John got it. He understood the principles I was teaching because I talked grower language and so did John,” said Green, 62, who spoke with Capital Press on Feb. 15 while visiting Morton in The Dalles.
Morton found Regina and Kordia cherries did well on the Vogel Spindle. Bing, Skeena and Lapin did not, but do well on the KGB.
Morton and Long became Oregon promoters of the two dwarfing systems, enlisting several visits from Green and Vogel. Several smaller growers in The Dalles turned to those systems and the manager of 3,000 acres of orchards for investment companies adopted a version of the KGB, Morton said.
Using the dwarfing systems in his orchards, Morton said by 2003 he was able to pick the same amount of fruit with 35 pickers that previously had required 75.
Morton believes more growers should consider the KGB and Vogel systems for labor savings and fruit quality. A legitimate question, he said, is whether Bing is becoming the Red Delicious of the cherry industry. There’s just too many on the market after the Fourth of July, he said.
“I left 240 tons of Bing on the trees last season because I couldn’t afford to pick them,” he said.
The KGB’s 25 leaders coming off the main trunk a couple feet above the ground in goblet fashion transfer the tree’s vigor from vegetation to fruit, Green said.
Cherries grow in clusters on the vertical leaders instead of horizontal limbs. The leaders have more sap flow, nutrients and water than lateral limbs and thus grow larger, firmer and better cherries, Green said. Summer topping at eight feet de-vigorates the tops and allows more light lower on the leaders, making stronger buds, he said.
It’s about six feet across open space from leaders on one side of the goblet to the other. Double planting rows and 600 trees per acre keeps volume up, he said.
“Some modern systems have 30,000 lineal yards of fruiting wood per hector whereas the KGB has 50,000 to 60,000, so double. It’s a lot more fruiting wood and less structural wood,” Green said. A hectare equals about 2.47 acres.
Growers in Chile also use it, he said.
The UFO (Upright Fruiting Offshoot) developed by Matthew Whiting, a Washington State University plant physiologist, is based on the KGB but is 10 leaders on a single stem in the same plane to form a fruiting wall for mechanical harvesting, Green said.
The UFO has too much vegetative vigor, about 10 percent per limb versus 4 percent for the KGB and 20 percent for a normal tree, he said.
“UFOs are monsters. To get volume you have to go higher and then you’re fighting the tree the whole time. It’s not a pedestrian orchard,” Green said. “Mechanical harvesting is way overrated. It’s like pissing in the wind. It won’t happen in our lifetime.”
Whiting disagrees. He said the UFO was not developed from the KGB, is not too vigorous, does not yield “monster” trees and that mechanical harvesting is a proven possibility.
“Industry adoption is inevitable,” Whiting said of mechanical harvesting, adding the UFO is designed for production efficiency, not just mechanized harvest.
“We have data to show better hand harvest efficiency in UFO compared to KGB,” he said. “I am against any pedestrian system for sweet cherries because it will unnecessarily limit yield and profit.”
He said his observations do not support Green’s per limb vigor percentages.
“The biggest challenge is achieving relatively uniform vigor among uprights and knowing the right balance of uprights per tree to be neither excessively vigorous nor weak in annual growth,” Whiting said.
“The KGB is certainly not better in general. I do not think growers should be turning to any system that does not form a compact fruiting wall,” he said.
Roughly 50 percent of Washington’s cherries come from low-density orchards of large old trees. New plantings are not mainly UFO, but many are V-trellised, Whiting said. There is a great diversity in systems with a clear trend toward higher-density, size-controlling rootstocks and planar systems, he said.
Mark Hanrahan, husband of Ines Hanrahan, postharvest physiologist for the Washington Tree Fruit Research Commission, is a proponent of the UFO system, which he began using 15 years ago in his orchard near Zillah, Wash. He uses it on 40 acres of Rainier, Santina, Tieton, Cowiche, Early Robin and Chelan cherries.
The UFO fruits on vertical leaders but people let it fruit on laterals as well, he said.
“I’ve seen a lot of train wrecks because of apical (central leader) dominance is so strong. You want the strong leader at the end,” he said.
The SSA (Super Spindle Axis) tree style also is good, and any planar system is better than the KGB because they can be mechanically harvested while the KGB can’t, he said. He also believes cherries will be mechanically harvested.
While there’s still debate over the KGB, UFO and other systems, Morton’s interest in innovation hasn’t stopped there.
He’s experimented with rain netting used in Europe but determined it’s too expensive. It works in Europe because governments pay half the costs, he said.
Morton has been testing new varieties owned by private nurseries but bred in university programs in East Germany, Czechoslovakia and Hungary before the collapse of communism in Eastern Europe.
“A lot of good cherry breeding was done there before the fall of the Berlin Wall but it was never promoted,” he said. “So we’ve been sorting through and testing varieties from there for a number of years.”
It’s a slow process, he said. Material comes in under quarantine to the WSU Clean Plant Center Northwest in Prosser.
John Morton
Age: 70
Origins: Born and raised in Sweet Home, Ore., and spent summers on his grandparents’ wheat ranch near Pendleton, Ore.
Family: Wife, Doriene, a retired nurse, four grown children, seven grandchildren.
Education: Bachelor’s degree in agricultural engineering, Oregon State University, 1971.
Work History: Western Farm Service (fertilizer), Athena, Ore., 1971 to 1982; managed center-pivot farms for insurance companies in Eastern Oregon and Eastern Washington, 1982 to 1988; spray manager Mt. Adams Orchards, White Salmon, Wash., 1988 to 1992; The Dalles fieldman for Oregon Cherry Growers, 1992 to 2009; cherry grower since 2000.