EFFECT OF CARBON DIOXIDE CONCENTRATION IN AIR ON SOME BIOLOGICAL ASPECTS OF THE ONION BULB FLY, Eumerus vestitus BEZZI (SYRPHIDAE, DIPTERA) | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 11, Volume 27, Issue 10, October 2002, Page 7093-7100 PDF (2.15 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2002.255366 | ||||
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| Author | ||||
| H. A. Eishabrawy | ||||
| Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt. | ||||
| Abstract | ||||
| The 2nd, 3'd instar larvae, 3 and 8 days old pupae of the onion bulb fly, E. vestitus were exposed to 3 different concentrations of CO2 in air for 24, 48 and 72 hr. The rate of mortality in all treatments was positively correlated with C02-concentration air and the exposure period . Treatments of the 2nd and 3'd instar larvae resulted increasing the larval duration while the rate of pupation was reduced by increasing the C02 concentration and/or the exposure period. Also, the pupal duration was increased while the rate of adult emergence was greatly reduced. Treatments of 3 and 8 days old pupae resulted increasinq the pupal duration but the percent of adult emergence was decreased by increasing the C02 concentration and/or the exposure period. In general, the pupae were more tolerant than the larvae and the 8 days old pupae were more sensitive than the 3 days pupae. | ||||
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