Antennal and behavioural response of codling moth Cydia pomonella to plant volatiles

Abstract

Identification of host volatile compounds attractive to codling moth Cydia pomonella, a most important insect of apple, will contribute to the development of safe control techniques. Synthetic apple volatiles in two doses were tested for antennal and behavioural activity in codling moth. Female antennae strongly responded to (Z)3-hexenol, (Z)3-hexenyl benzoate, (Z)3-hexenyl hexanoate, (±)-linalool and E,E-a-farnesene. Two other compounds eliciting a strong antennal response were the pear ester, ethyl (E,Z)-2,4-decadienoate, and its corresponding aldehyde, E,E-2, 4-decadienal, which is a component of the larval defence secretion of the European apple sawfly. Attraction of codling moth to compounds eliciting a strong antennal response was tested in a wind tunnel. Male moths were best attracted to a blend of (E,E)-a-farnesene, (E)-beta-farnesene and ethyl (E,Z)-2,4-decadienoate. The aldehyde E,E-2,4-decadienal had an antagonistic effect when added to the above mixture.

Antennal and Behavioral Response of Cydia pomonella and Lobesia botrana Moths to Allyl Cinnamate

“…This indicates that its action would not be strictly related with the mating process but has to be involved in general activity (feeding, host-localization). This observation contrasts with the one produced by several plant volatiles, which are more attractive after mating [34,35].…”

“…It is known that the size of EAG response does not always indicate a behavioral response [34]. Even though male and female antenna elicitation was recorded, only females were attracted to sources baited with allyl cinnamate in the wind-tunnel.…”

Host plant volatiles serve to increase the response of male European grape berry moths, Eupoecilia ambiguella, to their sex pheromone

“…Other (Z)-3-hexen-1-ol:(E)--caryophyllene ratios as with a mixture of (Z)-3-hexen-1-ol, (E)--caryophyllene and methyl salicylate at 10,000: 10,000:10,000 added to the pheromone caused the eVect of the individual compounds to disappear to a response level no diVerent to the underdosed pheromone alone. The attractiveness of mixtures of plant volatiles has been extensively studied for female C. pomonella and L. botrana by Ansebo et al (2004) and Tasin et al (2005Tasin et al ( , 2006aTasin et al ( , b, 2007 with the conclusion that the ratio between host plant volatiles is critical. A mixture of the three most abundant volatiles at the ratio occurring over grape berries, i.e.…”

Coding and interaction of sex pheromone and plant volatile signals in the antennal lobe of the codling moth Cydia pomonella

“…The test compounds (Fig.1), 13 plant-and four pheromone compounds, have previously been shown to elicit electroantennographic and behavioural responses in C. pomonella (Ansebo et al, 2004;Witzgall et al, 2001 Each compound was dissolved in re-distilled hexane (Labscan, Malmo, Sweden), and 10l aliquots, containing 100 ng of pheromone or 10g of plant compounds, were applied onto filter paper (0.5ϫ1cm) that were inserted into Pasteur pipettes. For tests of two-component blends, two filter papers were placed in a pipette and the dose of each compound in the blend was the same as the dose of the single compounds.…”