| Effect of ultrasonic wave on reproductive biology of Mediterranean flour moth, Ephestia kuehniella Z. (Lep.; Pyralidae) |
| Paper ID : 1051-3IICE (R1) |
| Authors: |
|
atefeh hosseini mighani *1, mohsen yazdanian2, ahmad nadimi3 1Gorgan university of Agricultural Sciences and natural Resources-Faculty of Plant Production- Department of Plant Protection 2Gorgan university of Agricultural Sciences and natural Resources- faculty of plant productio- Department of plant protection 3Gorgan university of Agricultural sciences and natural Resources- Faculty of plant production- Department of plant protection |
| Abstract: |
| Control of stored-products pests is easily achievable by using different fumigants, but negative effects of these chemical compounds such as thinning ozone layer, persistency in nature and high toxicity to living organisms have caused their application to be limited. Such problems concerning the use of synthetic chemicals in stored-products pest control programs have led the researchers to study on probable alternative compounds or methods with less hazardous effects. Among safe methods, ultrasonic waves have shown considerable effects such as repelling adult insects and imposing negative effects on some biological aspects of insects, especially on stored-products lepidopterans. Ultrasonic producing devices are cheap wares and do not impose high control costs. In this study, effects of ultrasonic wave emitted from a commercial device (16.6-25.0 kHz) were investigated on the reproductive biology of Mediterranean flour moth, Ephestia kuehniella Z. (Lep.; Pyralidae). The commercial ultrasound producing device was mounted at the middle portion of ceiling of a plexiglass box (30×30×30 cm). According to the results, egg exposure to ultrasound for 1, 2, 3 and 4 days significantly reduced egg hatchability from 96.0% in control to 72.0% after 4 days exposure. Exposure of first instar neonate larvae at the same intervals exposure significantly decreased the adults emergence (from 94.0% in control to 62.0% after 4 days exposure), increased male longevity (from 6.4 days in control up to 7.5 days after 4 days exposure) and female longevity (from 5.5 days in control up to 6.8 days after 4 day exposure), and decreased fecundity of emerged adults (from 224.0 in control to 190.0 eggs/female after 4 days exposure). Adult exposure at 2, 4 and 6 days intervals decreased their fecundity (from 192.1 in control to 119.8 eggs/female after 6 days exposure), however, no effect was observed on adults' longevity. Results obtained from such investigations can introduce a control method based on a device with considerable effects on stored-products pests as a substitution non-chemical method for management of this pest and other similar stored-products lepidopterans. Side effects of ultrasonic waves on non-target organisms remain yet to be investigated, but application of the method in stored conditions makes it to be safe for human health. |
| Keywords: |
| Ephestia kuehniella, ultrasonic wave, fecundity, longevity. |
| Status : Paper Accepted (Poster Presentation) |
