Fig 5. Effect of decalactones and their pure enantiomers (1–6) on the settling preferences of Myzus persicae in the choice test.

1—(±)-δ-decalactone (4b), 2—(+)-(R)-δ-decalactone (4b), 3—(–)-(S)-δ-decalactone (4b), 4—(±)-γ-decalactone (4a), 5—(+)-(R)-γ-decalactone (4a), 6—(–)-(S)-γ-decalactone (4a). Data are expressed as values of indices of deterrence (DI). * P < 0.05 (Student t-test).