Remain Vigilant About LBAM

June 02, 2017
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Conventional and organic strawberry growers should continue to be vigilant in efforts to control Light Brown Apple Moth (LBAM). Implementation of integrated pest management practices, including in-field scouting, is the best management practice for detection. If LBAM is found, the treatments linked below may be effective in reducing in-field populations.
Treatment options are taken from the UC-IPM website (http://bit.ly/2q8ELAl) and are registered for use in California strawberries. They are listed in order of usefulness in an IPM program, considering minimal impact on both beneficial insects and honey bees. Applications are most effective at the larval stages.
In addition to the listed treatment applications, use of pheromone twist ties (Isomate LBAM Plus, Pacific Biocontrol Corp., Vancouver, WA) can be used to disrupt the LBAM mating cycle, and is approved for organic production.
Always adhere to label instructions and rotate chemical classes with no more than two applications of chemicals in the same Insecticide Resistance Action Committee (IRAC) number to avoid development of resistance.
The commission's Production Guideline for leafrollers, including LBAM can be found:
As a reminder, LBAM is a federally regulated, quarantine-rated pest. Harvested conventionally grown strawberry fruit remains exempt from the LBAM Federal Order inspection protocols for interstate and in-state shipments. All organic strawberry fruit remains subject to the LBAM Federal Order, including inspections and individual compliance agreements. Inspected fruit found infested with LBAM in the fields or at the coolers is subject to the provisions of the Federal Order, must remain in the regulated area, and requires trace-back inspections to the source field where the fruit was grown. If LBAM is determined to be present in grower fields, regulatory treatments and harvest holds are required.
Conventional growers located within the quarantine boundary with compliance agreements and export to Canada, as well as all Organic growers, are required to conduct weekly scouting and be able to provide weekly scouting reports if audited.
It is important to remain diligent and watchful to avoid LBAM infestation of fruit at every level of production and cooler operations.
Maps detailing the quarantined areas can be found here: http://tinyurl.com/zgh96xr
Information on LBAM quarantine and management: http://tinyurl.com/ptufs4e
Strawberry leafroller UC IPM recommendations: http://tinyurl.com/h3agdw2
If you have any questions, please contact Mercy Olmstead, Sr. Manager of Production Research and Education at molmstead@calstrawberry.org.

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