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Effect of certain insect growth regulators on the lipid
content of some tissues of the desert locust Schistocerca
gregaria
Hamadah Kh.Sh.*, Ghoneim K.S. and Tanani M.A.
Department of Zoology, Faculty of Science, Al-Azhar
University, Madenit Nasr, Cairo, Egypt.
*Corresponding author. E-mail:
khalidhamadah@yahoo.com. Tel: 01224909904, 01149564795.
Accepted 24 April, 2012 |
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The present study was carried out to investigate the
metabolic effects of pyriproxyfen, tebufenozide or lufenuron
on the lipid content in two different tissues: hemolymph and
fat body of the early-, mid- and late-aged old nymphs as
well as 1- and 4-days old adult females. Hemolymph lipid
content of the early-aged nymphs had been subjected to a
reducing effect after treatment with high concentration of
insect growth regulators (IGRs). With the age of nymphs, all
IGRs could significantly or non-significantly reduce the
lipid content of hemolymph. Concerning the lipid content in
fat bodies of nymphs, a predominant inhibitory effect of all
IGRs was detected. With regard to the adults, nymph
treatments led to remarkable or slightly decreased lipids in
the hemolymph, as an exceptional case; because the lipid
content non-significantly increased in 4-day old adults
after treatment with low concentration level of lufenuron.
The current IGRs unexceptionally exhibited inhibitory
effects on the lipids of adult fat bodies.
Key words:
Schistocerca gregaria, lipids, fat body, hemolymph,
nymph, adult, pyriproxyfen, tebufenozide, lufenuron. |
