Grant, Joe

Knight, Alan L.

Light, Douglas M.

Pickel, Carolyn

Reynolds, Katherine M.

Undetermined

ScholarsArchive@OSU

Thresholds and MonitoringUSING THE KAIROMONE LURE, DA2313 TO MONITORCODLING MOTH IN APPLE AND PEARAlan L. KnightUSDA, ARS, Wapato, WAAbstract: Lures loaded with the pear ester (DA2313) were used to monitor > 100apple and pear orchards under both conventional and mating disruption-based (MD)pest control programs. Catches of codlingmoth was similar or higher in MD appleorchards than in sex pheromone-baited traps. DA2313-baited traps performedsimilarly in conventional apple orchards during the first flight but captured only 30%the number ofmoths as in pheromone-baited traps during the second flight. DA2313-baited traps caught only 10% as many moths as pheromone-baited traps in pearorchards. First sustained capture ofmoths in DA-2313-baited traps plus 155 degree-days was an excellent predictor of egg hatch. Moth catch thresholds of > 4 moths or >2 female moths in DA2313-baited traps appeared to be a reasonable threshold forapplying supplemental sprays in pheromone-treated orchards during the first flight. Asimilar threshold can be used for second flight.Abs02 Thresholds Light.docDEVELOPMENT OF KAIROMONE-BASED MONITORING FOR BOTH SEXES OFCODLING MOTH IN CALIFORNIA WALNUTSDoug Light, Kathy Reynolds, Alan Knight, Carolyn Pickel and Joe GrantUSDA-ARS, Western Regional Research Center, Albany, CA 94710The ability of the kairomonal attractant to monitor the phenology of female and malecodling moths was investigated for the fourth year in Califomian walnut orchards undereither conventional or mating dismption controls. The pear-derived volatile, ethyl (2E,4Z)-2,4-decadienoate, and certain other host-plant volatiles have been optimized incomposition, delivery rate, and formulation to create lures with enhanced populationmonitoring and prediction capability. Replicated pairs ofpheromone-baited andkairomone-baited traps are being used to compare the detection and resolution of codlingmoth biofix, flight initiation - emergence, flight duration, peak and periodicity,population intensity, and the mating status of captured female moths. These populationmonitoring parameters are being correlated with the occurrence and degree of orchard nutdamage (nut drop, canopy infestation, and harvest damage). With this data, a female-based 'biofix' model is being developed to predict egg hatch based upon the trap captureand monitoring of female emergence.27

Development of kairomone-based monitoring for both sexes of codling moth in California walnuts

https://ir.library.oregonstate.edu/downloads/7h149v83d

Development of kairomone-based monitoring for both sexes of codling moth in California walnuts

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