MATING DISRUPTION OF PEA MOTH, Cydia nigricana, AND CODLING MOTH, C. pomonella, BY PHEROMONE AND ATTRACTION ANTAGONISTS

Anna-Carin BACKMAN, Marie BENGTSSON, Jan LÖFQVIST, Mats SVENSSON, Peter WITZGALL
Swedish University of Agricultural Sciences, Dept. of Plant Protection Sciences, P.O. Box 44, S-230 53 Alnarp, SWEDEN

Mating disruption is an environmentally safe technique to control insects. The method must become more reliable, especially at high population densities.

Synanthedon pictipes (1), Eupoecilia ambiguella (2,3), and Planotortrix octo (4).

In a mating disruption trial against the pea moth, Cydia nigacana, males were initially attracted to dispensers containing >99% pure (E,E)-8,10-dodecadien-1-yl acetate. After nine days, the formation of the 8% of antagonistic isomers suppressed attraction to the dispensers, and the males were even repelled from the treated pea field (5).

Orchard treatment with (E,E)-8,10-dodecadien-1-ol (codlemone) stimulate anemotactic flight and searching of coaling moth males. This may lead to encounters with calling females at high population densities.

(E,E)-8,10-dodecadien-1-yl acetate (codlemone acetate) is a strong attraction antagonist for coaling moth males (6,7). In orchards treated with a blend of codlemone and codlemone acetate, male orientation flights were not observed.

A detailed account of ongoing field studies will be presented.

Literature
  1. Pfelffer D.G., Killian J.C., Rajotte, E.G., Hull L.A. Snow, J.W.: J. Econ. Entomol. 84, 218 (1991).
  2. Arn H., Rauscher S., Buser H.-R., Guerin P.M.: J. Chem. Ecol. 12,1417 (1986).
  3. Vogt H., Schropp A., Neumann U., Eichhorn K.W.: J. Appl. Entomol. 115, 217 (1993).
  4. Suckling D.M., Burnip G.M.: Entomol. Exp. Appl. 7fl 149 (1996)
  5. Bengtsson M., Karg G., Kirsch P.A., Löfqvist J., Sauer A., Witzgall P.: J. Chem. Ecol. 20, 871 (1994).
  6. Hathaway D.O., McGovern T.P., Beroza M., Moffitt H.R., McDonough L.M., Butt B.A.: Environ. Entomol. 3, 522 (1974).
  7. George D.A., McDonough L.M., Hathaway D.O., Moffitt H.R.: Environ. Entomol. 4, 606 (1975).
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