Zoller, Broc G.

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Thresholds and MonitoringSEASONAL OVIPOSITION PREFERENCE OF CODLING MOTH BETWEEN CUTAND INTACT FRUIT OF BARTLETT AND BOSC PEAR CULTIVARSB. G. ZollerThe Pear Doctor, Inc., P. O. Box 335, Kelseyville, California 95451Keywords: codling moth, Cydiapomonella, pears, oviposition preferenceAbstract: Oviposition was monitored weekly comparing intact andcutfruit clustersamples inan orchard with adjacent Bartlett and Bosc cultivars inthe Sacramento Valley.In sixweekly samples prior toMay 23 (965 degree days, 53 days before first Bartlettharvest), oviposition was slightly more frequent intheintact fruit clusters compared withthecutfruit clusters. Beginning May 23 through July 18 (2461 degree days, 3 days afterfirstBartlett harvest), cutfruit clusters became much preferred oviposition sites overintact fruit clusters. Intact Bosc were preferred over Bartlett in the late season, also.Early Season Late Season PRatio, %Oviposition Mean SE Mean SE t-testCut: Intact Bosc: Bosc -2.67 1.23 9.48 4.39 0.05Bart: Bart -3.67 1.31 71.44 33.69 0.10Bosc: Bart -1.67 0.96 75.44 22.52 0.02Intact: Intact Bosc: Bart 1.00 1.98 19.00 6.79 0.06Thresholds and MonitoringSEASONAL COMPARISON OF MONITORING TECHNIQUES FOR CODLINGMOTH IN MATING DISRUPTED PEAR ORCHARDSB. G. Zoller and A. M. ZollerThe Pear Doctor, Inc., P. O. Box 335, Kelseyville, California 95451Keywords: codling moth, Cydiapomonella,pears, oviposition monitoringAbstract: A season long weekly comparison ofmonitoring techniques for codlingmothwas made in a Bartlett orchard undergoing mating dismption in the SacramentoValley.Themethods compared were (1) 10mg highpheromone trappingfor males, (2) samplingintact fruit clusters for oviposition, and (3) sampling cutfruit clusters for oviposition.Prior to May23 (965 degree days), 53 daysbefore harvest, one male was present in twoof three traps, while all cutfruit cluster samples were negative and intact clusters reached8% oviposition in a perimeter sample next to untreated walnuts. However, after June 6(1320 degreedays), 39 days before harvest,no male codlingmothswere trappedwhilecutfruit cluster samples on the same trees as the moth traps reached 122%oviposition.Intact cluster samples reached 8% oviposition and cutfruit cluster samples reached 220%oviposition levels in perimeter samples next to the untreated walnuts.29

Seasonal oviposition preference of codling moth between cut and intact fruit of Bartlett and Bosc pear cultivars

https://ir.library.oregonstate.edu/downloads/q237hx590

Seasonal oviposition preference of codling moth between cut and intact fruit of Bartlett and Bosc pear cultivars

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