PROMOTING ACCESS TO AFRICAN RESEARCH

African Journal of Range and Forage Science

Log in or Register to get access to full text downloads.

Remember me or Register



DOWNLOAD FULL TEXT Open Access  DOWNLOAD FULL TEXT Subscription or Fee Access

Condensed tannin in Eragrostis chloromelas leaves deters feeding by a generalist grasshopper

J Dini, N Owen-Smith

Abstract


We investigated the feeding responses of a generalist grasshopper, the brown locust(Locusta pardalina), to leaves of the grass Eragrostis chloromelas differing in polyphenol content. For three specimens of E. chloromelas, the presence of condensed tannin in epidermal cells was confirmed by histochemical staining, while two specimens lacked polyphenols. Locusts selected the leaves of tannin-free plants for feeding significantly more frequently than leaves from plants containing tannins. Findings suggest that the food choice of some locusts was affected by the presence of tannins, although variability in feeding responses among individuals was apparent. However, we cannot exclude the possibility that other differences existed between the specimens.

Keywords: allelochemicals; botany; brown locust; Eragrostis chloromelas; feeding; grasshoppers; insect herbivory; insects; leaves; Locustana pardalina; tannin

African Journal of Range and Forage Science 1995, 12(2): 49–52



http://dx.doi.org/10.1080/10220119.1995.9647863
AJOL African Journals Online