Along with sulfate turpentine, the essential oils obtained by steam distillation from nine plant species naturally grown in Turkish forests were tested at three different concentrations to evaluate their effectiveness against the larvae of pine processionary moth (Thaumetopoea pityocampa Schiff). The results indicated that the essential oils from the nine species and sulfate turpentine were effective against the larvae of T pityocampa. The most effective essential oil in the control of the larvae was steam-distilled wood turpentine, followed by thyme herb oil, juniper berry oil, laurel leaf oil, lavender flower oil, eucalyptus leaf oil, lavender leaf oil, cypress berry oil, essential oil of styrax and sulfate turpentine, respectively, in terms of mean mortality time. It is therefore feasible to use these essential oils as environment-friendly insecticides in the control of T pityocampa.
-In this study, the influence of defoliation by pine processionary moth, Thaumetopoea pityocampa (Den. & Schiff.) (Lepidoptera: Thaumetopoeidae) on the annual diameter increment of Turkish Calabrian pine, Pinus brutia Ten. in Kahramanmaras province, Turkey, was investigated. The study was carried out between 1995 and 1998. During the four years, the defoliation of pine processionary moth caused a significant decrease (average 21% for four years, P < 0.05) in the annual diameter increment with respect to control, undefoliated trees.
Thaumetopoea pityocampa / diameter increment / Kahramanmaras / Turkey / Pinus brutia
Résumé -Effet des défeuillaisons par Thaumetopoea pityocampa (Den. & Schiff.) sur l'accroissement annuel de Pinus brutia Ten. enTurquie. L'influence de défeuillaisons par la processionnaire du Pin Thaumetopoea pityocampa, sur l'accroissement annuel en diamètre de Pinus brutia, a été testée dans la province de Kahramanmaras, en Turquie. L'étude fut conduite de 1995 à 1998. Durant ces 4 années, les défeuillaisons ont causé une diminution significative (en moyenne 21 % pour les 4 ans, P < 0,05) de l'accroissement annuel en diamètre, en comparaison avec des témoins non défeuillés.Thaumetopoea pityocampa / accroissement en diamètre / Kahramanmaras / Turquie / Pinus brutia
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