Apple fruit infested with codling moth are more attractive to neonate codling moth larvae and possess increased amounts of (E,E)-alpha-farnesene

Apple fruit artificially infested with codling moth larvae attracted signif icantly more neonate larvae of the codling moth, Cydia pomonella than uninf ested fruit. A greater number of larvae responded to odor in an olfactomete r from codling moth-infested cold-stored Red Delicious thinning apples than uninfested apples. Immature Granny Smith, Red Delicious, or Golden Delicio us apples that were infested on the tree for five days by codling moth larv ae were more attractive to neonate codling moth larvae than similar but uni nfested fruit of the same varieties. Apples infested on the tree and sample d five days later also contained significantly greater amounts of the larva l attractant (E,E)-alpha-farnesene, compared to uninfested apples. Other ty pes of injury to apple fruit did not produce results similar to that from c odling moth infestation, either in increased attractiveness to codling moth larvae or in increased quantities of (E,E)-alpha-farnesene. These results are consistent with the reported attractiveness of (E,E)-alpha-farnesene to neonate codling moth larvae.