ß-Thujone and Its Derivatives Modify the Probing Behavior of the Peach Potato Aphid.
Molecules
; 24(10)2019 May 14.
Article
in En
| MEDLINE
| ID: mdl-31091712
ABSTRACT
Thujone is a natural biologically active monoterpene ketone component of essential oils of numerous plants. The aim of the study was to evaluate the effect of ß-thujone and ß-thujone derivatives bisulfite adduct, lactone, oxime, and lactam application on behavior of Myzus persicae (Sulz.) (Hemiptera Aphididae) during probing and settling. The choice and no-choice tests (aphid settling and Electrical Penetration Graph (EPG), respectively) revealed that stereochemistry of thujone was important for biological activity (ß-thujone caused changes in aphid behavior while α-thujone did not) and that cyclopentane ring modifications and functional groups addition gave derivatives that possessed stronger and more durable deterrent effects. The most effective modification was the incorporation of a lactam moiety into the ß-thujone molecule. Application of ß-thujone lactam limited aphid settling for at least 24 h, caused restlessness in aphids and a delay or failure in reaching phloem phase by M. persicae. ß-Thujone lactam can be considered a deterrent of medium potency with activity expressed at preingestive phase of aphid probing. Other compounds did not restrain aphid stylet penetration in non-phloem tissues but slightly limited sap ingestion (lactone, oxime), and restrained aphid settling for a period of less than 24 h (ß-Thujone, bisulphite adduct, lactone).
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Aphids
/
Solanum tuberosum
/
Monoterpenes
/
Lactams
Limits:
Animals
Language:
En
Journal:
Molecules
Journal subject:
BIOLOGIA
Year:
2019
Document type:
Article
Affiliation country:
Poland