›› 1993, Vol. 36 ›› Issue (3): 277-281.

• RESEARCH PAPERS • Previous Articles     Next Articles

BIOLOGICAL ACTIVITIES OF ADIPOKINETC HORMONEEXTRACT FROM AN APHID, MACROSIPHUM SP.

Wu ZHEN-TING R. E. ISAAC   

  • Online:1993-08-20 Published:1993-08-20

Abstract: Adipokinetic and hyperglycemic hormones have been discovered in several insects, but no approach has been made to homopterans. In this study, crude extract of adipokinetic hormone was isolated from an aphid, Macrosiphum sp., and its biological activities were tested. Infecuon of the crude extract equivalent to 20 mg aphids mto Schistocerca gregaria and Pertptaneta americana caused increases of lipid and sugar levels in haemolymph by 131.03% and 60.43%, respectively. The results showed that the extract had a much higher adlpokinetic activity than hyperglycemic effect. The activities could be suppressed by treatment with endopeptidase, pyroglptamyl aminopeptidae or high temperature.

Key words: Macrosiphum sp——Schistocerca gregaria——Periplaneta americana