Seasonal variation in the effectiveness of the leaf-feeding beetle Zygogramma bicolorata (Coleoptera: Chrysomelidae) and stem-galling moth Epiblema strenuana (Lepidoptera: Tortricidae) as biocontrol agents on the weed Parthenium hysterophorus (Asteraceae)
- 1 September 2003
- journal article
- Published by Cambridge University Press (CUP) in Bulletin of Entomological Research
- Vol. 93 (5), 393-401
- https://doi.org/10.1079/ber2003255
Abstract
Variation in the effectiveness of biocontrol agents on the weed Parthenium hysterophorus L. was evaluated at two properties (Mount Panorama and Plain Creek) in Queensland, Australia for four years (1996–2000) using a pesticide exclusion experiment. At Mount Panorama, higher levels of defoliation by the leaf-feeding beetle Zygogramma bicolorata Pallister and galling by the moth Epiblema strenuana Walker in 1996–97 coincided with an above average summer rainfall, but in the following three years with below average summer rainfall the defoliation and galling levels were significantly lower. Biocontrol had significant negative impact on the weed only in 1996–97 with no major impact in the following three years. At Plain Creek, galling by E. strenuana was evident in all the four years, but varied significantly between years due to non-synchrony between P. hysterophorus germination and E. strenuana emergence. At Plain Creek biocontrol had limited impact on the weed in 1996–97 and 1997–98, with no significant impact in the following two years. Over the 4-year period, defoliation and galling resulted in 70% reduction in the soil seed bank at Mount Panorama, but the reduction in the soil seed bank at Plain Creek due to galling was not significant. Effectiveness of Z. bicolorata and E. strenuana was dependent on weather conditions and as a result had only limited impact on the weed in three out of four years.Keywords
This publication has 16 references indexed in Scilit:
- Current Status of the Stem-boring WeevilListronotus setosipennis(Coleoptera: Curculionidae) Introduced Against the WeedParthenium hysterophorus(Asteraceae) in AustraliaBiocontrol Science and Technology, 2003
- Classical Biological Control of Nodding and Plumeless ThistlesBiological Control, 2001
- Effects of gall damage by the introduced biocontrol agent Epiblema strenuana (Lep., Tortricidae) on the weed Parthenium hysterophorus (Asteraceae)Journal of Applied Entomology, 2001
- Response of the Weed Parthenium hysterophorus (Asteraceae) to Defoliation by the Introduced Biocontrol Agent Zygogramma bicolorata (Coleoptera: Chrysomelidae)Biological Control, 2000
- Efficacy of the Stem-Galling MothEpiblema strenuanaWalk. (Lepidoptera: Tortricidae) as a Biological Control Agent for Ragweed Parthenium (Parthenium hysterophorus L.)Biological Control, 1998
- The population dynamics of an introduced tree, Sesbania punicea , in South Africa, in response to long-term damage caused by different combinations of three species of biological control agentsOecologia, 1998
- Impact of the Gall-Forming Rust FungusUromycladium tepperianumon the Invasive TreeAcacia salignain South AfricaBiological Control, 1997
- Succession of Vegetation after Suppression of Parthenium Weed byZygogramma bicoloratain Bangalore, IndiaBiological Agriculture & Horticulture, 1996
- Disturbance, Competition, and Herbivory Effects on Ragwort Senecio Jacobaea PopulationsEcological Monographs, 1993
- The Effects of Herbivory by a Weevil Species, Acting Alone and Unrestrained by Natural Enemies, on Growth and Phenology of the Weed Sesbania puniceaJournal of Applied Ecology, 1989