The effect of essentials oil and resistant cultivars on penetration percentage of first instar larva of the Potato Tuber Moth, Phthorimaea operculella (Lepidoptera: Gelechiidae)
عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران
نویسندگان
چکیده
The potato tuber moth Phthorimaea operculella (Zeller) is one of the most important pests of potato in storage and farms in tropical and subtropical regions. This insect is an oligophagous pest of solanaceous plants and due to the high fertility and egg production, would have high economic losses. Chemical pesticides play a very significant role in preserving the world’s food supply. Nonetheless, the application of these types of pesticides leads to environmental implications, undesirable effects on human being and development of resistance in pests. Over the past few years, Application of plant derivatives including essentials oil and plant extracts have been considered as suitable alternatives to chemical pesticides in pest control. In this study, the possible effects of Satureja hortensis L., Ferula asafoetida L., Origanum suriasum L., Citrus lemon L., and potato cultivars including Agria, Arinda, Ranomi, Caesar and Sante on penetration percentage of first-instar larvae have been investigated. For this purpose, plant essences with the concentration of %25 have been prepared and covered the surface of potatoes cultivars with them. Afterwards, 15 first-instar larvae were placed on each tuber. A comparison between average results clearly showed that there is a significant difference between treatment group and control. Mean comparison of data, showed that there is a considerable difference between control and experiment samples. Regarding the results showed that the essentials oil of Origanum suriacum (on cultivar Agria), Satureja hortensis (on the Agria) and Asafoetid Ferula asafoetida (on the Caesar), had the greatest impact on reducing the penetration percentage of larvae respectively.
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