May 2019 WCN Digital Edition

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Continued from Page 69 • Prevents population increase of CM in walnuts Disadvantages • Does not help control pests other than CM • Can be expensive relative to insecticides • CM pressure can be variable from year to year In a recent Walnut Board-funded mark-release-recapture study of the impact of aerosol dispenser height on mating disruption for CM, Burks said researchers compared Mating Disruption for CM Passive, such as hand-applied meso-dispensers, and active release (aerosol) pheromone dispensers have been developed and research has fine-tuned pheromone technology to be both cost effective and efficacious. Photo courtesy of Charles Burks. recapture of marked sterile CM males in traps baited with normal-strength pheromone monitoring lures. “The objectives were to compare effectiveness of aerosol dispensers in upper versus lower canopy of mature walnut orchards,” he added. “Also, to examine the effect of aerosol dispenser placement on trap suppression in the lower and upper canopy.” The study took place in walnut orchards in Kings and Butte counties. Researchers placed dispensers at lower, mid and high levels of orchard canopies in both locations. In addition, the dispenser spacing was 1.5 per acre and 256 feet apart in both locations. In the Kings study, tree spacing was 44-feet by 44-feet, north-south rows with dispensers six trees and six rows apart. The Butte trial tree spacing was 25-feet by 25-feet, eastwest rows, placing dispensers 10 trees and 10 rows apart. Burks said mating disruption significantly suppressed Continued on Page 72 Researchers place pheromone aerosol dispensers at lower, mid and high levels of a walnut tree in a Mark-Release-Recapture Study of the impact of aerosol dispenser heights on mating disruption for codling moth. Photo courtesy of Charles Burks. 70 West Coast Nut May 2019
Enhanced Codling Moth Larval Control! For conventional and organic California walnuts!! DECREASE DAMAGE 40% Average Reduction Compared to Insecticide Alone * Available in 10, 20 and 40 acre container sizes! MICRO-ENCAPSULATED SPRAYABLE! “ CIDETRAK DA MEC will provide a higher level of insecticide efficacy in killing hatched larval worms and protecting the walnut set that the grower currently sees and counts on by targeting the Codling Moth 1B, 2nd and 3rd flights, with the added benefit of decreasing damaged-nut sites for NOW to later infest. ~ Dr. Douglas Light, USDA-ARS, Emeritus “ CIDETRAK ® DA MEC contains a novel, patented kairomone in a micro-encapsulated liquid formulation that influences the behavior of adult and larval Codling Moth, resulting in significant enhancement of the control of Codling Moth larvae when tank mixed with various insecticides. Additionally, Codling Moth adult control is significantly enhanced when mixed indirectly with airborne Codling Moth pheromone applied as a mating disruption treatment. • What it does: Disrupts oviposition. Changes larval behavior: Stops/delays locating walnut; stops/delays walnut entry and reduces damage. • How to use it: Simply tank mix with each insecticide application. • Longevity: More than 14 days following application. ® ENHANCED CODLING MOTH CONTROL INCORPORATED INSECT PHEROMONE & KAIROMONE SYSTEMS Your Edge – And Ours – Is Knowledge. Contact your local supplier and order now! Visit our website: www.trece.com or call: 1- 866-785-1313. PLEASE: ALWAYS READ THE LABEL *Based on USDA analysis global data base. May 2019 www.wcngg.com 71 © 2019, Trécé Inc., Adair, OK USA • TRECE, PHEROCON and CIDETRAK are registered trademarks of Trece, Inc., Adair, OK USA • TRE-1489, 4/19
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WEST COAST NUT MAY 2019 ISSUE SPOTL
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