Investigations on the effects of Xanthium strumarium L. extracts on colorado potato beetle, Leptinotarsa decemlineata (Say, 1824) (Coleoptera: Chrysomelidae)

Abstract :

The effects of Xanthium strumarium L. extracts obtained methanolic were investigated on (Leptinotarsa decemlineata Say), Colorado potato beetle larvae and adults were treated in the laboratory conditions. As a result of the investigation, in all methods other than leaf disk method during larva instar, depending on the rising rate of concentration of these extracts prolonged larvae and pupae instar, causing a high death rate of larvae and pupae during instar, malformed larvae and pupae occured, decreased number of adults from pupae, and led health females to lay fewer eggs. In disk method antifeed effect was observed in larvae and adults. In dipping methods in adults, it was determined that females laid much fewer eggs than the control individuals and that less larvae occured.

Keyword :

Leptinotarsa decemlineata Say, Xanthium strumarium L., repellent antifeed, growth effect, extract

Author(s) : Erdoğan, P., Toros, S.
Downloads : 3001
Published Issue : 2007 Vol. 2 Number 2

2007 Vol. 2 Number 2