Seasonal occurrence and biology of globe thistle capitulum weevil Larinus onopordi (F.) (Coleoptera: Curculionidae) in Northeastern Turkey

Abstract :

The biology of weevil species, Larinus onopordi (F.) living on globe thistle Echinops sphaerocephalus L. was described for the first time. The species is univoltine, adults overwinter under hiding object as aggregated. Eggs are inserted into the flowerhead; L. onopordi deposited eggs superficially, 1-23 (3.76) eggs each capitulum may be occur in one flowerhead, larvae develop in capitulum eating and destroying the seeds. In late summer, larvae complete their growth; prepare pupal case 1-4 (0.84) case in each flowerhead and pupation occurs in here. New generation adults emerge from flowerhead after waiting several days. Thus, this weevil has one generation per year in northeatern Turkey. A braconid wasp, Bracon facialis Thom. (Hymenoptera: Braconidae) reared from the pupal stage of L. onopordi.

Keyword :

Larinus onopordi, Echinops sphaerocephalus, biology, Curculionidae, Lixinae, northeastern Turkey

Author(s) : Gültekin, L.
Downloads : 3259
Published Issue : 2006 Vol. 1 Number 2

2006 Vol. 1 Number 2