- Title
- Responses of the weed parthenium hysterophorus (Asteraceae) to the stem Gall-inducing Weevil Conotrachelus albocinereus (Coleoptera: Curculionidae)
- Creator
- Florentine, Singarayer; Westbrooke, Martin; Dhileepan, Kunjithapatham
- Date
- 2002
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/31500
- Identifier
- vital:307
- Identifier
- ISSN:0171-8177
- Abstract
- A slem-galling weevil COT/o/rad,e/us alboeinereus Fiedler 1940 from Argentina is being field released to regulate populations of the weed Parlhenium hysterophorus in Queensland, Australia since 1995. In this paper we report the tissue and metabolic responses in P hyslerophorus in the context of the biology and feeding behaviour of the weevil. C albocinereus induces elliptical galls often on the main shoot axes and rarely on the terminal and axillary mcristems of the host plant. From oviposition through gall maturation, the structure and metabolism of the host-plant tissues. especially at the gall region, change continuously to accommodate pressure inflicted by the feeding larva. The host plant shows re-dirtttion of its vital metabolites to the gall, and to the lTlCtaplasitd cells of nutrition in particular. In mature galls. the pith parenchyma elements tum lignified. Larval feeding fractures the vertical continuity of vascular tissues, which affects the host plant's overall metabolism As the larva tunnels the shoot eolulTVl. it places the frass at the fissured vascular sites. That activity initialcs n«rosis and eventual death of the living eells of the vascular tissue complex. Such a development induces water.logging stress in the gall and the evapotranspirauonal system displays contrasting responses. Pennanenl1y closed Siomatal apertures and abnonnally inflated substomatal chambers indicate that P hYSleropltorus suffers moisture-stress with cecidogenesis. The larval performance triggers moisture inundation in the galled shoot and this appears to be an advantage in using this weevil in the control of P hyslerop/rorus.; C1
- Publisher
- Medizinverlage Stuttgart
- Relation
- Entomologia Generalis Vol. 26, no. 3 (2002), p. 195-206
- Rights
- Copyright Medizinverlage Stuttgart
- Rights
- Open Access
- Rights
- This metadata is freely available under a CCO license
- Subject
- 0608 Zoology; Parthenium hysterophorus Linnaeus; Parenthium hysterophorus; Galling behaviour; Host plant responses; Water-logging stress; Conotrachelus albocinerceus Fiedler 1940
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