Effect of aqueous extracts from vermicomposts on attacks by cucumber beetles (Acalymna vittatum) (Fabr.) on cucumbers and tobacco hornworm (Manduca sexta) (L.) on tomatoes

Pedobiologia ◽  
2010 ◽  
Vol 53 (2) ◽  
pp. 141-148 ◽  
Author(s):  
Clive A. Edwards ◽  
Norman Q. Arancon ◽  
Marcus Vasko-Bennett ◽  
Ahmed Askar ◽  
George Keeney
Keyword(s):  
Manduca Sexta ◽  
Tobacco Hornworm ◽  
Aqueous Extracts ◽  
Cucumber Beetles

scholarly journals Glucagon-like and insulin-like hormones of the insect neurosecretory system

1976 ◽  
Vol 156 (3) ◽  
pp. 515-520 ◽  
Author(s):  
H S Tager ◽  
J Markese ◽  
K J Kramer ◽  
R D Speirs ◽  
C N Childs
Keyword(s):  
Manduca Sexta ◽  
Glycogen Content ◽  
Biological Activities ◽  
Tobacco Hornworm ◽  
Corpus Allatum ◽  
Neurosecretory System ◽  
Aqueous Extracts ◽  
Corpus Cardiacum ◽  
Larval Form

Aqueous extracts of corpus cardiacum-corpus allatum complexes of the adult tobacco hornworm Manduca sexta produced both glycogenolysis and hypoglycaemia when injected into the larval form of the same species. Application of specific radioimmuno assays to similar extracts showed also that these gland complexes contain both glucagon-like and insulin-like peptides. Further, the partially purified immunoreactive peptides had the expected biological activities. The former decreased the glycogen content of the fatbody and the latter the circulating trehalose levels in recipient animals. These results suggest the existence of hormones in these invertebrates having both biological and structural similarities to vertebrate insulin and glucagon.

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