WCN December 2019

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Continued from Page 12 to minimize crop damage. A second shake of pollinator varieties should be done by early September to prevent a fourth flight of NOW and reduce overwintering numbers. Haviland said a case study showed that reducing mummy nuts to an average of two per tree paves the way for greater efficacy of mating disruption and insecticide sprays. Those two efforts can reduce crop damage by about 50 percent. Sanitation reduces the odds that survivors will mate and find suitable places to lay eggs. “The farther separated they start, the easier to keep them apart,” Haviland said. The case study showed that when Nonpareils are harvested by early August, worms are removed from the orchard and the third flight of this insect is negligible, providing protection of later harvested pollinator varieties. When Nonpareils are harvested later in August, the worms become the third flight of adults, re-infesting the Nonpareils and infesting the pollinator varieties. Results of a University of California (UC) West Side Research and Education Center IPM study showed that one timed application of an insecticide reduced NOW damage by 50 percent where mating disruption was used. Data also showed consistent reduction in moths captured and crop damage where mating disruption was used. Reduction in the number of insecticide applications is important because of resistance issues. The two most widely used insecticide products are Intrepid and Alticor, and Haviland noted that there are no new chemistries for control being developed. Pyrethroid use is no better with resistance and also can lead to mite flare-ups. Continued on Page 16 "Results of a University of California (UC) West Side Research and Education Center IPM study showed that one timed application of an insecticide reduced NOW damage by 50 percent where mating disruption was used." The Future of Mating Disruption is NOW Remote-controlled camera traps and dispensers Unique variable rate pheromone application Installation, monitoring, and maintenance included New for 2020: Water management & per acre hull split prediction tools Call us at 1.855.924.3282 or email us at: info@semios.com semios.com A full-service solution of sensors and controls to monitor and manage pests, weather, disease risk, and soil moisture. 14 West Coast Nut December 2019
LONG-LASTING + BURNDOWN CONTROL OF 51 TOUGH BROADLEAVES Pindar ® GT herbicide provides long-lasting control – up to six months – of the toughest broadleaves, including fleabane, marestail, filaree and malva. Plus, Pindar GT provides post-emergence activity on many winter and summer annual broadleaves, including fleabane and marestail. Commercial use has shown consistent performance across geographies, soil types and rainfall levels. For the strongest foundation in your residual weed control program, use Pindar GT herbicide. December 2019 www.wcngg.com Visit us at corteva.us ® Trademarks of Dow AgroSciences, DuPont or Pioneer and their affiliated companies or respective owners. Always read and follow label directions. ©2019 Corteva 15
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WCN December 2019

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