M. A. Eid
Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt
S.A. S. El-Maasarawy
Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt
G. Elsayed
Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt
A. M. EI-Gammal
Locust and Grasshoppers Research Department, Plant Protection Research Institute, Dokki, Egypt
G. A. Mohamed
Locust and Grasshoppers Research Department, Plant Protection Research Institute, Dokki, Egypt
ABSTRACT
The egg pod of Schistocerca gregaria as other Acrididae is consisted of two essential parts, the eggs and the froth plug above the buried egg mass. Froth and egg mass extracts were obtained by single solvent extractions. Solitarious and gregarious ovipositing females were exposed to contaminated ovipositing sand cups or treated antennae with froth and egg extracts. The mean number of egg pods per female and the mean number of egg per pod were significantly reduced in all treatment by contaminated sand or antennae in both solitary and gregary females, by froth and egg extracts. The fecundity and fertility are remarkably reduced in all treated females compared with control. The ethanol solvent caused higher reduction in fertility percentages than hexane extracts in case of contaminated sand. The hatched nymphs per female were significantly diminished by treatments in all cases. Furthermore, the reproductive potential were lower than control in all treatments and the decrease ranged from 42.1 to 97.4%.
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How to cite this article
M. A. Eid, S.A. S. El-Maasarawy, G. Elsayed, A. M. EI-Gammal and G. A. Mohamed, 2004. Do Egg Pods in the Desert Locust Schistocerca gregaria Display as Oogenesis Limiting Factor? 1-The Effect of Egg Pod Extracts on Reproductive Performance. Pakistan Journal of Biological Sciences, 7: 423-430.
DOI: 10.3923/pjbs.2004.423.430
URL: https://scialert.net/abstract/?doi=pjbs.2004.423.430
DOI: 10.3923/pjbs.2004.423.430
URL: https://scialert.net/abstract/?doi=pjbs.2004.423.430
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