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Hausmann A.,SNSB Bavarian State Collection of Zoology Zoologische Staatssammlung | Chainey J.,Natural History Museum in London | Heard T.A.,CSIRO | Mc Kay F.,Fundacion para El Estudio de Especies Invasivas | Raghu S.,CSIRO
Zootaxa | Year: 2016

A new species is described from Argentina: Eueupithecia vollonoides sp. n. and a differential diagnosis from E. cisplatensis Prout, 1910 is given. The genus Eueupithecia Prout, 1910 (Sterrhinae), so far having been retained to be monotypic, includes two species now. © Copyright 2016 Magnolia Press. Source

Weber D.C.,Biocontrol | Leskey T.C.,U.S. Department of Agriculture | Walsh G.C.,Fundacion para El Estudio de Especies Invasivas | Khrimian A.,Biocontrol
Journal of Economic Entomology | Year: 2014

The reported male-produced aggregation pheromone of the brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), identified as a mixture of (3S,6S,7R,10S)- 10,11-epoxy-1-bisabolen-3-ol and (3R,6S,7R,10S)-10,11-epoxy-1-bisabolen-3-ol, offers new opportunities for its management.Wefound that black pyramid traps deployed along crop borders in Maryland and West Virginia, containing lures with both stereoisomers of this reported aggregation pheromone combined with methyl (E,E,Z)-2,4,6-decatrienoate (MDT) lures, attracted more adult and nymphal H. halys than either the aggregation pheromone or MDT alone. In season-long totals, combined lures acted synergistically by catching 1.9-3.2 times more number of adults, and 1.4-2.5 times more number of nymphs, than expected from an additive effect of the lures deployed individually. There were no significant differences in patterns of male and female captures. MDT alone was not significantly attractive to adults during most of the growing season, but became increasingly attractive to adults and especially nymphs in autumn. Mixed-isomer lures containing eight stereoisomers of 10,11-epoxy- 1-bisabolen-3-ol, including the two active stereoisomers, were as effective at catching adults and nymphs with or without MDT as were lures loaded only with the two active stereoisomers in the natural ratio ((3S,6S,7R,10S)-10,11-epoxy-1-bisabolen-3-ol: (3R,6S,7R,10S)-10,11-epoxy- 1-bisabolen- 3-ol) of 3.5:1. These results identify a combination of semiochemicals that is attractive season-long for detection, monitoring, and potential control of this polyphagous invasive pest of North America and Europe. © 2014 Entomological Society of America. Source

McConnachie A.,Agricultural Research Council Plant Protection Research Institute | McConnachie A.,Australian Department of Primary Industries and Fisheries | McKay F.,Fundacion para El Estudio de Especies Invasivas
BioControl | Year: 2015

We report on the host range and impact of Liothrips tractabilis Mound and Pereyra (Thysanoptera: Phlaeothripinae), the first biological control agent to be considered for Campuloclinium macrocephalum (Less.) DC. (Asteraceae) (pompom weed) in South Africa. Laboratory host-range tests were conducted on 45 Asteraceae species. Field host range studies included 16 Asteraceae species. Results of both laboratory tests and field host range data indicated that L. tractabilis is suitably host specific to C. macrocephalum and hence safe for release in South Africa. Laboratory impact studies on both seedlings and regrowth showed that, even under low inoculation densities, L. tractabilis had a significant impact on plant height, number of leaves, flower production and biomass. Based on the above data, permission for the release of the thrips was applied for, and in June 2013, granted by South African authorities. First releases of L. tractabilis were made in the summer of 2013/2014, and in November 2014 its establishment was confirmed. © 2015, International Organization for Biological Control (IOBC). Source

Geng Y.,Yunnan University | Geng Y.,Fudan University | van Klinken R.D.,CSIRO | Sosa A.,Fundacion para El Estudio de Especies Invasivas | And 3 more authors.
Frontiers in Plant Science | Year: 2016

Phenotypic plasticity has been proposed as an important adaptive strategy for clonal plants in heterogeneous habitats. Increased phenotypic plasticity can be especially beneficial for invasive clonal plants, allowing them to colonize new environments even when genetic diversity is low. However, the relative importance of genetic diversity and phenotypic plasticity for invasion success remains largely unknown. Here, we performed molecular marker analyses and a common garden experiment to investigate the genetic diversity and phenotypic plasticity of the globally important weed Alternanthera philoxeroides in response to different water availability (terrestrial vs. aquatic habitats). This species relies predominantly on clonal propagation in introduced ranges. We therefore expected genetic diversity to be restricted in the two sampled introduced ranges (the USA and China) when compared to the native range (Argentina), but that phenotypic plasticity may allow the species' full niche range to nonetheless be exploited. We found clones from China had very low genetic diversity in terms of both marker diversity and quantitative variation when compared with those from the USA and Argentina, probably reflecting different introduction histories. In contrast, similar patterns of phenotypic plasticity were found for clones from all three regions. Furthermore, despite the different levels of genetic diversity, bioclimatic modeling suggested that the full potential bioclimatic distribution had been invaded in both China and USA. Phenotypic plasticity, not genetic diversity, was therefore critical in allowing A. philoxeroides to invade diverse habitats across broad geographic areas. © 2016 Geng, van Klinken, Sosa, Li, Chen and Xu. Source

Wheeler G.S.,U.S. Department of Agriculture | Mc Kay F.,Fundacion para El Estudio de Especies Invasivas | Vitorino M.D.,Regional University of Blumenau | Williams D.A.,Texas Christian University
BioControl | Year: 2013

Surveys for biological control agents of the invasive weed Schinus terebinthifolius (Anacardiaceae) discovered two Omolabus weevils (Coleoptera: Attelabidae) feeding on the plant in its native range. Molecular and morphological analysis indicated that one of these species consistently fed on the target weed and the other species fed more broadly. Aspects of the biology and host range of the more specific species, Omolabus piceus (Germar) were examined to determine its suitability as a biological control agent of S. terebinthifolius in the USA. Adults feed on newly formed leaves, and eggs, larvae and pupae develop in curled fragments of leaves, called nidi. Larvae consumed an average of 11.3 (±0.4) mg throughout their development which required 15.1 (±0.2) days. An average of 31.6 (±2.7) eggs were laid per female during their 23.8 (±2.2) day lifetime, after a 3.4 (±1.0) day preoviposition period. In no-choice tests, O. piceus adults fed and oviposited on all tested native North American, Caribbean and agricultural Anacardiaceae species except for M. indica. The field host-range of O. piceus, as determined by samples of host use in the native range, included three Schinus, two Lithrea and one Anacardium species. Therefore, we do not recommend O. piceus for biological control of S. terebinthifolius in the USA. However, the utilization of this species in other infested areas such as Hawaií and Australia should be considered. © 2013 International Organization for Biological Control (outside the USA). Source

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