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EFFECTS OF FIVE NEW COMPOUNDS ON THE LARVAL GROWTH AND DIGESTIVE PHYSIOLOGY OF THE ASIATIC CORN BORER, OSTRINIA FURNACALIS LARVAE
Author(s) -
He Jia,
Yan Zeng–guang,
Jiang Zhisheng
Publication year - 2003
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2003.tb00381.x
Subject(s) - ostrinia furnacalis , midgut , larva , biology , proteases , instar , ostrinia , enzyme , chymotrypsin , trypsin , biochemistry , botany , pyralidae
Five new compounds were tested on the growth and antifeeding activity compared with toosendanin against fifth instar larvae Ostrinia furnacalis. The activities of two proteases, a weak alkaline trypsine‐like enzyme and a chymotrypsin‐like enzyme, in the midgut of Ostrinia furnacalis larvae were also measured. Experimental results suggest that when incorporated into an artificial diet at the concentration of 500mg/kg, the antifeeding activities of toosendanin, C 19 , C 23 , C 24 , C 26 , C 28 were 51.16%, 57.61%, 4.28%, 51.08%, 36.73% and 51.67%, respectively, C 19 , C 24 , C 28 had no significant difference with toosendanin. At 20mg/kg, the larval growth were remarkably suppressed by C 19 , C 26 , C 28 , the inhibition of C 28 was close to toosendanin in 48 h. The two proteases were activated by toosendanin and C 28 while they were inhibited in 48 h but activated in 24 h by C 19 , C 24 and C 26 . In this paper, the related functions and mechanisms were discussed.