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Antifeeding and protease- and amylase-inhibiting activity of fentin acetate in Spodoptera littoralis larvae
Year:
1973
Authors :
Ascher, K. R. Simon
;
.
Ishaaya, Isaac
;
.
Volume :
3
Co-Authors:
Ascher, K.R.S., The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel
Ishaaya, I., The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel
Facilitators :
From page:
326
To page:
336
(
Total pages:
11
)
Abstract:
Fentin acetate (FA) at effective antifeedant concentrations does not have a high, immediate toxicity for 170-190 mg larvae of the Egyptian cotton leafworm (Spodoptera littoralis); the mortality of such larvae exposed to FA residues on leaves is not appreciably higher than that of larvae being starved. The antifeedant effect of FA is also not due to an influence on sensory receptors on the mouth parts. Protease and amylase are inhibited in vivo in larvae feeding on FA-treated leaves; the enzyme inhibition increases with the concentrations of the leaf-dipping suspensions. At 0.05% FA, protease and amylase activity was only about 20 and 30%, respectively, of that of the control larvae and was lower than in starved larvae. Antifeeding and enzymatic inhibition are also obtained by injecting FA into the haemocoel, results which indicate that FA does not inhibit the digestive enzymes directly, but seems to affect the enzyme production in the gut. This interpretation is strengthened by the finding that the addition of massive amounts of FA to the enzyme reaction mixture does not affect the enzyme activity. © 1973.
Note:
Related Files :
amylase
anorexigenic agent
arthropod
environmental health
enzyme inhibition
intoxication
Receptor
triphenyltin acetate
Show More
Related Content
More details
DOI :
10.1016/0048-3575(73)90031-X
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
31153
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:00
You may also be interested in
Scientific Publication
Antifeeding and protease- and amylase-inhibiting activity of fentin acetate in Spodoptera littoralis larvae
3
Ascher, K.R.S., The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel
Ishaaya, I., The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel
Antifeeding and protease- and amylase-inhibiting activity of fentin acetate in Spodoptera littoralis larvae
Fentin acetate (FA) at effective antifeedant concentrations does not have a high, immediate toxicity for 170-190 mg larvae of the Egyptian cotton leafworm (Spodoptera littoralis); the mortality of such larvae exposed to FA residues on leaves is not appreciably higher than that of larvae being starved. The antifeedant effect of FA is also not due to an influence on sensory receptors on the mouth parts. Protease and amylase are inhibited in vivo in larvae feeding on FA-treated leaves; the enzyme inhibition increases with the concentrations of the leaf-dipping suspensions. At 0.05% FA, protease and amylase activity was only about 20 and 30%, respectively, of that of the control larvae and was lower than in starved larvae. Antifeeding and enzymatic inhibition are also obtained by injecting FA into the haemocoel, results which indicate that FA does not inhibit the digestive enzymes directly, but seems to affect the enzyme production in the gut. This interpretation is strengthened by the finding that the addition of massive amounts of FA to the enzyme reaction mixture does not affect the enzyme activity. © 1973.
Scientific Publication
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