Premium
Effect of methoxyphenols on grain aphid feeding behaviour
Author(s) -
Leszczynski B.,
Tjallingii W. F.,
Dixon A. F. G.,
Swiderski R.
Publication year - 1995
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.1995.tb01957.x
Subject(s) - biology , aphid , aphididae , feeding behavior , agronomy , botany , pest analysis , homoptera , zoology
Methoxyphenols might be important in the resistance of cereals to aphids. Electrical penetration graph (EPG) recordings were used to determine the effect of caffeic, ferulic and sinapic acids, and scopoletin on the feeding behaviour of the grain aphid Sitobion avenae (F.). Aphids on wheat seedlings treated systemically with these phenols showed reduced ingestion of phloem sap and salivation into sieve elements in most cases. The earlier pathway phases of probing were prolonged. Moreover increase in number of probes as well as reduction of total time of probing was observed. In addition, no O‐demethylase activity was found in homogenates of aphids fed on moderately‐resistant (phenolic rich) or susceptible (phenolic poor) wheat varieties. The significance of these results for understanding the resistance of cereals to aphids is discussed.