Good Fruit Grower

March 1

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www.goodfruit.com GOOD FRUIT GROWER MARCH 1, 2015 33 Call us FIRST for the largest selection of trees and rootstocks available Future contracts for cherries, pears, & apples; ALL ROOTSTOCKS. NEW APPLE rootstock! 1-800-421-4001 Phone: 503-538-2131 Fax: 503-538-7616 E-mail: info@treeconnect.com Web: www.treeconnect.com INC. Representing Over 30 Leading Nurseries in the U.S. and Europe From the breeders of Bud 9: • Vigor between M-9 T337 and M-9 Pajam®2 • Yield efficiency similar to M-9 T337 • Dwarfing • Cold hardy • Disease resistant • Fireblight tolerant B10 ® cv. Mich 96 USPP 21,223 Services are FREE TO GROWERS! Providing the Highest Quality Pollen Since 1929! CHAMBERLIN DISTRIBUTING HOOD RIVER, OR 541-354-2700 WENATCHEE 509-663-7151 G.S.LONG COMPANY YAKIMA, WA 509-575-8382 PEACH RIDGE ORCHARD SUPPLY SPARTA, MI 616-887-8239 (DAVID CHASE) P O L L I N A T I O N E N H A N C E M E N T Antles Pollen Supplies, Inc. 135 N. Mission Street, Suite 9, Wanatchee, WA 98801 p: 855-POLLEN8 f: 509-662-6647 e: info@antlespollen.com www.antlespollen.com f o r : A l m o n d • ¬ $ S S O H • $ S U L F R W • A v o c a d o C h e r r y • K i w i f r u i t • P e a r • P i s t a c h i o • P l u m f r o m . . . State of the art pollination enhancement since 1929! He placed stinkbugs in caged pear trees in June and at harvest to compare differences in damage. Fruit from early season feeding had hard cells compared to pithy, decayed spots resulting from feeding at harvest. Fruit from both feeding times were placed in cold storage and examined one month later. "The damage gets manifested during storage," Shearer said. "Fruit that looked sound going in came out decayed." In his sweet cherry study, he put male stinkbugs in caged cherry trees when fruit were straw colored and followed the fruit through harvest. Within a week of exposure, fruit showed damage and at harvest, fruit had corky spots. "The timing of early June is when they start coming out en masse," he said. Trapping and lures Effective traps and lures are still works in progress. "There's a lot of work going on, but we're not there yet," he said. The difficulty with lures is finding one that attracts brown marmorated stinkbug early in the season. Current lures, including USDA's new #10 lure, works mainly in the fall and catches few stinkbugs in the spring. Springtime control is important because that's when they are most vulnerable and easiest to kill. "When the big stinkbug tanks come in later in the summer, they are the ones that do major damage," said Shearer, noting that East Coast growers treat the pest as a perennial and spray routinely. "There are efficacious products out there, but the chemicals are short-lived. If you don't spray stinkbug directly, it takes more sprays and effort to kill them." Researchers also continue to fine-tune trap design. "The lures and traps are changing all the time," he said. "More research is needed to be able to relate num- bers of stinkbug in traps to damage in the field. As we develop standardized lures and traps, we'll be able to improve things like the threshold number." Ultimately, Shearer believes that biological con- trol will be the saving grace for those battling brown marmorated stinkbug. • PHOTOS COURTESY OF PETER SHEARER Granny Smith apple shows corking from feeding damage by brown marmorated stinkbug that occurred two to three weeks before harvest. Previous page: Red cherry, ready to harvest on July 7, shows damage from brown marmorated stinkbug that occurred when the stinkbug was caged on fruit right before harvest. Above: This damage to cherries at straw color resulted within a week of exposing caged fruit to brown marmorated stinkbug.

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