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Risk to nontarget plants from Ophraella communa Coleoptera Chrysomelidae, a potential biological control agent of alien invasive weed Ambrosia artemisiifolia Asteraceae in China



Risk to nontarget plants from Ophraella communa Coleoptera Chrysomelidae, a potential biological control agent of alien invasive weed Ambrosia artemisiifolia Asteraceae in China



Applied Entomology and Zoology 46(3): 375-381



Ophraella communa LeSage is an oligophagous insect that shows promise for controlling the alien invasive weed Ambrosia artemisiifolia L. in China. This study was performed to evaluate the risk of O. communa on the basis of host-specificity testing of larval development under no-choice conditions and of oviposition preferences under choice conditions in greenhouses and in the open field. Under no-choice conditions, O. communa larvae experienced much higher mortality rates on the nontarget plants than on the target weed, but a small proportion of larvae completed development on the nontarget plants examined, including Xanthium sibiricum Patrin ex Widder, Helianthus tuberosus L., and H. annuus L. Multiple-choice tests indicated that O. communa showed a strong oviposition preference for the target weed over the nontarget plants and laid few eggs on the economically important Helianthus crops tested. In paired-choice trials, O. communa adults showed an obvious preference for the target weed over X. sibiricum but preferred X. sibiricum to H. annuus. The results suggest that X.sibiricum might be used as a lower-ranked host plant next to the target weed by O. communa, and that Helianthus crops would not be at risk of being used for oviposition in the field.

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Accession: 036090898

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DOI: 10.1007/s13355-011-0048-8



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