| factors affecting flight activity of ophraella communa (coleoptera: chrysomelidae), an exotic insect in japan. | the exotic beetle ophraella communa lesage was first found in 1996 in japan and has rapidly expanded its distribution. this study examined the effect of several factors on the flight activity of this beetle and estimated its dispersal potential by measuring its flight time on a flight mill system. the beetles exhibited low flight activity at the age of 1-3 d posteclosion; however, after 4 d, it increased and thereafter remained high. the beetles reduced flight activity under the dark photophase, ... | 2009 | 19791619 |
| genetic variation in flight activity of ophraella communa (coleoptera: chrysomelidae): heritability estimated by artificial selection. | the exotic beetle ophraella communa lesage (coleoptera: chrysomelidae) was first found in 1996 in japan and has rapidly expanded its distribution. this study investigated variation in flight activity and its genetic basis in this beetle by measuring its flight time on a flight mill system. the o. communa population exhibited substantial variation in flight activity among individuals. more than 30% of the beetles did not fly at all during a 23-h experimental period, whereas 20-26% of the beetles ... | 2009 | 19791623 |
| effects of temperature on survival, development, longevity, and fecundity of ophraella communa (coleoptera: chrysomelidae), a potential biological control agent against ambrosia artemisiifolia (asterales: asteraceae). | ophraella communa (coleoptera: chrysomelidae) is a leaf beetle that is unintentionally introduced in china. it is a potential biological control agent against common ragweed, ambrosia artemisiifolia (asterales: asteraceae). the effects of temperature on the development and fecundity of o. communa were studied at eight constant temperature regimens (15, 20, 22, 25, 28, 30, 32, 36 degrees c) in the laboratory. the results showed that the developmental periods for egg, larva, pupa, and entire immat ... | 2010 | 20550818 |
| contemporary evolution of host plant range expansion in an introduced herbivorous beetle ophraella communa. | host range expansion of herbivorous insects is a key event in ecological speciation and insect pest management. however, the mechanistic processes are relatively unknown because it is difficult to observe the ongoing host range expansion in natural population. in this study, we focused on the ongoing host range expansion in introduced populations of the ragweed leaf beetle, ophraella communa, to estimate the evolutionary process of host plant range expansion of a herbivorous insect. in the nativ ... | 2016 | 26728888 |
| new coleoptera records from new brunswick, canada: megalopodidae and chrysomelidae. | zeugophora varians crotch and the family megalopodidae are newly recorded for new brunswick, canada. twenty-eight species of chrysomelidae are newly recorded for new brunswick, including acalymma gouldi barber, altica knabii blatchley, altica rosae woods, altica woodsi isely, bassareus mammifer (newman), chrysolina marginata (linnaeus), chrysomela laurentia brown, crepidodera violacea melsheimer, cryptocephalus venustus fabricius, neohaemonia melsheimeri (lacordaire), neohaemonia nigricornis (ki ... | 2012 | 22539900 |
| barcoding chrysomelidae: a resource for taxonomy and biodiversity conservation in the mediterranean region. | the mediterranean region is one of the world's biodiversity hot-spots, which is also characterized by high level of endemism. approximately 2100 species of leaf beetle (coleoptera; chrysomelidae) are known from this area, a number that increases year after year and represents 5/6% of the known species. these features, associated with the urgent need to develop a dna-based species identification approach for a broad spectrum of leaf beetle species, prompted us to develop a database of nucleotide ... | 2016 | 27408584 |
| ambrosia pollen source inventory for italy: a multi-purpose tool to assess the impact of the ragweed leaf beetle (ophraella communa lesage) on populations of its host plant. | here, we produce ambrosia pollen source inventories for italy that focuses on the periods before and after the accidental introduction of the ophraella communa beetle. the inventory uses the top-down approach that combines the annual ambrosia pollen index from a number of monitoring stations in the source region as well as ambrosia ecology, local knowledge of ambrosia infestation and detailed land cover information. the final inventory is gridded to a 5 × 5-km resolution using a stereographic pr ... | 2017 | 29159703 |
| aerobiological monitoring and mapping of ambrosia plants in the province of parma (northern italy, southern po valley), a useful tool for targeted preventive measures. | ambrosia is an annual anemophilous weed producing allergenic pollen affecting public health in european countries. in italy, the most infested region is lombardy where, in some areas, it is the major cause of hay fever. in the parma district, until 2007, ambrosia seemed to be very rare, despite an observed increase of seasonal pollen index (spi), of pollen peak value and of asthma among ragweed sensitized patients. the aims of this study were to calculate ragweed pollen season and trends from 19 ... | 2017 | 29048450 |
| genetic basis underlying rapid evolution of an introduced insect ophraella communa (coleoptera: chrysomelidae): heritability of photoperiodic response. | | 2017 | 28177078 |
| effect of photoperiod on developmental fitness in ophraella communa (coleoptera: chrysomelidae). | ophraella communa lesage (coleoptera: chrysomelidae) is an important biological control agent of the common ragweed, ambrosia artemisiifolia l., in china. development and fecundity of o. communa, and hatch rate of progeny eggs were studied at five photoperiods (8:16, 10:14, 12:12, 14:10, and 16:8 [l:d] h). the highest survival rate of eggs was 92% at the photoperiod of 16:8 (l:d) h, and those of both larvae and pupae were observed at the photoperiod of 14:10 (l:d) h (85 and 96%). the shortest de ... | 2014 | 25203359 |
| cold temperatures increase cold hardiness in the next generation ophraella communa beetles. | the leaf beetle, ophraella communa, has been introduced to control the spread of the common ragweed, ambrosia artemisiifolia, in china. we hypothesized that the beetle, to be able to track host-range expansion into colder climates, can phenotypically adapt to cold temperatures across generations. therefore, we questioned whether parental experience of colder temperatures increases cold tolerance of the progeny. specifically, we studied the demography, including development, fecundity, and surviv ... | 2013 | 24098666 |
| changes in defense of an alien plant ambrosia artemisiifolia before and after the invasion of a native specialist enemy ophraella communa. | the evolution of increased competitive ability hypothesis (eica) predicts that when alien plants are free from their natural enemies they evolve lower allocation to defense in order to achieve a higher growth rate. if this hypothesis is true, the converse implication would be that the defense against herbivory could be restored if a natural enemy also becomes present in the introduced range. we tested this scenario in the case of ambrosia artemisiifolia (common ragweed) - a species that invaded ... | 2012 | 23145089 |
| insight into speciation from historical demography in the phytophagous beetle genus ophraella. | speciation in phytophagous insects is commonly associated with shifts in host use. using a phylogenetic framework to identify recently diverged taxa that have undergone a radical host shift, this study focuses on how reconstruction of the historical demography of a species, in conjunction with branching patterns between species, provides insight into mode of speciation. analyses of mitochondrial cytochrome oxidase i sequences indicate that the leaf beetle ophraella communa exhibits significant p ... | 1999 | 28565438 |
| tests of inbreeding effects on host-shift potential in the phytophagous beetle ophraella communa. | although inbreeding, on average, decreases additive genetic variance, some inbred populations may show an increase in phenotypic variance for some characters. in those populations with increased phenotypic variance, character changes by peak shifts may occur because of the effects of the higher variance on the adaptive landscape. a population's increased phenotypic variance may place it in the domain of attraction of a new adaptive peak or increase the likelihood of a selection-driven peak shift ... | 1999 | 28565413 |
| genetic constraints and the phylogeny of insect-plant associations: responses of ophraella communa (coleoptera: chrysomelidae) to host plants of its congeners. | we ask whether patterns of genetic variation in a phytophagous insect's responses to potential host plants shed light on the phylogenetic history of host association. ophraella communa feeds chiefly, and in eastern north america exclusively, on ambrosia (asteraceae: ambrosiinae). using mostly half-sib breeding designs, we screened for genetic variation in feeding responses to and larval survival on its own host and on seven other plants that are hosts (or, on one case, closely related to the hos ... | 1993 | 28567894 |