A survey of the repellency and anti oviposition effects of two plant species of essential oils on Tetranychus turkestani and its predator Orius albidipennis

Document Type : Research paper-Persian

Authors

1 M. Sc./Shahid Chamran University of Ahwaz

2 Dr/shahid chamran university of ahwaz

3 Dr/University of Agricultual & Natural Resources of Ramin

Abstract

The spider mite, Tetranychus turkestani is one of the main pests of cucurbit plants in southern provinces such as Khuzestan. Due to the undesirable effects of using pesticides, this research was performed in order to introducing safe alternative components for the environment. In this study, repellent and anti oviposition effects of Foeniculum vulgare and Citrus limon essential oils for mentioned mite females and its predator Orius albidipennis was investigated. 2000 ppm of each essential oil was applied as a contact. The most anti ovipositon effect by a mite and its predator has been observed on the first day after treatment. The mean of the eggs laid by mite on C. limon and F. Vulgar treatment was 0.3±0.48 and 0.5±0.48 respectively. The mean of the lowest opposition of its predator for mentioning treatments was 1±0.52 and 1.3±0.52 respectively. By passing time and decreasing the essential oils effect, the number of laid eggs increased slowly. According to the repellency index, essential oil of lemon had more repellency for mite in compared to the essential oil of fennel. Whereas, the essential oil of fennel had less repellency for its predator. Therefore, it seems that essential oil of fennel is a more safe component for using in IPM.

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