Journal of Crop Protection

Effects of asafoetida, geranium and walnut leaves essential oils on nutritional indices and progeny reduction on Rhyzopertha dominica adults (Coleoptera: Bostrychidae)

10.48311/jcp.2016.1280
Volume 5, Issue 3
September 2016
Pages 369-375
Journal of Crop Protection

Authors

R. Bahrami
F. Kocheili
M. Ziaee

Department of plant protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz-Iran.

Abstract
In this study, the efficiency of essential oils from asafoetida, Ferula assa foetida L.,geranium, Pelargonium hortorum L.H. Bailey and walnut leaves, Juglans regia F. was investigated on nutritional indices of Rhyzopertha dominica (F.) adults. Wheat grains were treated with different concentrations of the oils. The nutritional indices: relative growth rate (RGR), relative consumption rate (RCR), efficiency of conversion of ingested food (ECI) and feeding deterrence index (FDI) were measured at 28 ± 2 °C, 65 ± 5% R. H. in continuous darkness. RGR, RCR and ECI deceased as the concentration level was increased. While, FDI percent increased significantly as the concentration level increased. Asafoetida oil had the most efficiency on nutritional indices and 28.61 ppm of the oil was enough to decrease RGR, RCR and ECI% to 0.032 mg/mg/day, 0.444 mg/mg/day and 6.994%, respectively. FDI percent of adults exposed to 6.5 ppm of asafoetida oil was 13.31% which increased upto 64.62% at the concentration of 28.61 ppm. In the second experiment, the effect of tested essential oils was evaluated on F1 progeny reduction of R. dominica. Walnut and asafoetida leaves essential oils significantly suppressed progeny production by (59.92%) and (53.2%) respectively.

Keywords

Essential oil
lesser grain borer
progeny
Relative growth rate
Relative Consumption Rate
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