Insecticidal effect of gamma-T-ol from Melaleuca alternifolia (Maiden & Betche) Cheel and feverfew (Tanacetum parthenium L.) (Asteraceae) on Cydia pomonella (L.) (Lepidoptera: Tortricidae)

This research was undertaken as an alternative management strategy for codling moth, which present control is to use synthetic insecticides. Codling moth causes serious economic damage on apples, pears, quinces and walnut orchards in Turkey. Botanical insecticides were used extracted from Melaleuca alternifolia (Maiden & Betche) Cheel (Myrtaceae) and Tanacetum parthenium L. (Asteraceae). In these experiments only first instar larvae with same age were used. First instar larvae were dipped into the prepared four different dose of solutions of Gamma-T-ol, Fungatol and four different dose solutions for the T. parthenium for and after air-dried, five larvae were placed in the each petri dish containing artificial diet. Deltametrin 2.5 EC was used as positive control and as a negative control untreated control was used. The experiment was replicated six times. In all three plant extract experiments none of the treated larvae reached pupal stage. The data were collected daily. According to results, Gamma-T-ol had the highest mortality and effect the highest concentration 93.34 and 93.33%, respectively. Also, for Fungatol the highest mortality occurred at a concentration of 0.3% and the lowest at 0.05%. For T. parthenium the highest mortality took place at a concentration of 1% and the lowest at 12%. All larvae died during the first day when they were treated with Deltamethrin. Larvae in untreated control 93.33% reached pupal stage in which they hatched to normal adults. From these results it can be concluded that Gamma-T-ol with 93.34%, mortality showed near results compared with synthetic insecticide Deltamethrin. Therefore Gamma-T-ol may be used as an alternative to synthetic pesticides which is compatible with biological control and with integrated pest management systems.