Postharvest Control of the Date Moth Ectomyelois ceratoniae ... - Iresa

Table 2. Chemical fractions, others constituents and total identifiedcompounds of the essential oil obtained from leaves of E. rudiscollected at flowering stage (%)N° Compound Percent. (%) RT KIMonoterpene hydrocarbons 24.441 α-pinene 14.49 9.32 9512 β-pinene 3.91 10.45 9903 γ-terpinene 6.04 13.75 1068Oxygenated monoterpenes 28.854 1,8-cineole 19.87 12.79 10465 Terpinene-4-ol 4.46 17.1 12076 α-terpineol 4.32 17.43 1219Sesquiterpene hydrocarbons 9.229 Aromadendrene 6.37 23.64 144810 Bicyclogermacrene 2.85 25.19 1517Oxygenated sesquiterpenes 5.4712 Isospathulenol 3.09 29.29 169513 t-muurolol 2.34 29.71 1715Others compounds 10.13Total 78.11RI, KI were respectively Retention Index and Kováts Index calculatedon a HP-5MS capillary column (30 m × 0.25 mm × 0.25 µm).For E. rudis leaf essential oil, a totalof 78.11% of the constituents wasidentified (Table 2). The oxygenatedmonoterpenes represented 28.85%followed by the monoterpenehydrocarbons 24.44%, the sesquiterpenehydrocarbons 9.22% and the oxygenatedsesquiterpenes 5.47%. The mainconstituents were α-pinene (14.49%), β-pinene (3.91%), 1,8-cineole (19.87%), γ-terpinene (6.04%), terpinene-4-ol(4.46%), α-terpineol (4.32%) andaromadendrene (6.37%).ceratoniae adults exposed for variousperiods of time to essential oils from E.rudis and E. camaldulensis.Results showed that E.camaldulensis and E. rudis essential oilswere toxic to E. ceratoniae adults (Fig.1). E. camaldulensis was more toxic thanE. rudis for the concentrations exceeding52.63 µl/l air.At the lowest concentration (13.16µl/l air), E. rudis achieved 25% ofmortality after 24 h of exposure comparedwith 10% of mortality for E.camaldulensis. However, at the highestconcentration (131.58 µl/l air), 100%mortality was recorded for E.camaldulensis and E. rudis essential oilsFumigant toxicity. Mortality wascorrected for control mortality by usingAbbott’s formula (1). Results werepresented as percentage of mortality of E. after only 12 h of exposure (Fig. 1).Tunisian Journal of Plant Protection 205 Vol. 5, No. 2, 2010