Juvenillizing action of the desert locust Schistocerca gregaria egg pod extract | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 14, Issue 2, December 2006, Pages 73-82 PDF (240.23 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2006.460721 | ||
| Authors | ||
| A. M. EL-gammal* ; A. M. Gehan; M. T. Mohamed | ||
| Locust and grasshoppers Res. Department, Plant Protection Res. Institute, Agric. Res Centre, Ministry of Agric. Dokki, Giza, Cairo. | ||
| Abstract | ||
| The froth of Schistocerca gregaria egg pods was extracted in hexane, and tested against one day old 4th instar nymphs of the desert locust to study the juvenilizing action of the extract. To confirm the obtained results of egg pod extract, another group of 4th instar nymphs of S. gregaria were treated with different doses of the juvenile hormone analogue, fenoxycarb (2.5, 5.0 and 7.5µg / nymph). The two applications induced an increase in insect body weight, a prolongation in of the nymphal durations and high percentages of the adultoied insects from the emerged 5th instar nymphs. The most important juvenillizing feature is the adultoied insects which are characterized with adult wings, the pronotom and legs of the 5th instar nymphs. This feature is considered as an indicator of juvenilizing like effect of the egg pod extract. | ||
| Keywords | ||
| Juvenilizing action; egg pod extract; locust; Schistocerca gregaria; fenoxycarb | ||
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