| comparison of generalist predators in winter-flooded and conventionally managed rice paddies and identification of their limiting factors. | winter-flooding of rice paddies without the application of agricultural chemicals is attracting attention as a new agricultural method for enhancing the habitat conditions of wintering waterfowl in rice paddy ecosystems throughout japan and east asia. conditions in these paddies are expected to result in restoration of not only the winter habitats of waterfowl but also those of other taxonomic groups during the rice growing season. in this study, we tested whether the diversity of summer spiders ... | 2014 | 25140294 |
| sex pheromones and reproductive isolation in five mirid species. | mate location in many mirid bugs (heteroptera: miridae) is mediated by female-released sex pheromones. to elucidate the potential role of the pheromones in prezygotic reproductive isolation between sympatric species, we investigated differences in the pheromone systems of five mirid species, apolygus lucorum, apolygus spinolae, orthops campestris, stenotus rubrovittatus and taylorilygus apicalis. gc/ms analyses of metathoracic scent gland extracts of virgin females showed that all five species p ... | 2015 | 25973902 |
| mating attraction by stenotus rubrovittatus (heteroptera: miridae) females and its relationship to ovarian development. | stenotus rubrovittatus (matsumura) (heteroptera: miridae) causes brown or black marks on rice, oryza sativa l., grains (pecky rice), and it is becoming of increasing importance in japan. attractiveness of adult females or males of s. rubrovittatus to conspecific individuals was examined in the field in 2003 and 2004. unmated female-baited traps captured significantly more males than did the unmated male-baited traps. however, the numbers of females captured by female- or male-baited traps were l ... | 2007 | 17849880 |
| dynamics of neotyphodium uncinatum and n-formylloline in italian ryegrass, and their relation to insect resistance in the field. | a fungal endophyte, neotyphodium uncinatum, accumulates n-formylloline, which is toxic to hemipteran insects, in italian ryegrass. this study aimed to clarify the dynamics of n. uncinatum and n-formylloline in italian ryegrass, and their relationship to insect resistance. | 2014 | 24219582 |
| development of polymorphic microsatellite markers for the sorghum plant bug, stenotus rubrovittatus (heteroptera: miridae). | nine polymorphic microsatellite dna markers from the sorghum plant bug, stenotus rubrovittatus, were isolated and characterized. these markers were used to analyse 22 individuals from a single field population. the number of alleles at these nine loci ranged from two to 28 (mean = 11.4) and heterozygosity ranged from 0.27 to 0.86 (mean = 0.58). stenotus rubrovittatus has shown rapid population growth in the decades since the first report in the 1980s of serious damage to a rice crop. these micro ... | 2008 | 21585872 |
| effects of age and mating on female sex attractant pheromone levels in the sorghum plant bug, stenotus rubrovittatus (matsumura). | previous work has shown that male sorghum plant bugs, stenotus rubrovittatus (matsumura) (heteroptera: miridae), are more attracted to young virgin females than to old virgin females and are not attracted to mated females. therefore, we examined the effects of age and mating status on female sex pheromone levels. the pheromone components, hexyl butyrate, (e)-hex-2-en-1-yl butyrate, and (e)-4-oxohex-2-enal, were collected from females in two different ways. first, the compounds were extracted fro ... | 2010 | 20425138 |
| multiple origins of outbreak populations of a native insect pest in an agro-ecosystem. | native insects can become epidemic pests in agro-ecosystems. a population genetics approach was applied to analyze the emergence and spread of outbreak populations of native insect species. outbreaks of the mirid bug, stenotus rubrovittatus, have rapidly expanded over japan within the last two decades. to characterize the outbreak dynamics of this species, the genetic structure of local populations was assessed using polymorphisms of the mtdna coi gene and six microsatellite loci. results of the ... | 2011 | 21205395 |
| facilitation of a native pest of rice, stenotus rubrovittatus (hemiptera: miridae), by the non-native lolium multiflorum (cyperales: poaceae) in an agricultural landscape. | source populations of polyphagous pests often occur on host plants other than the economically damaged crop. we evaluated the contribution of patches of a non-native meadow grass, lolium multiflorum lam. (poaceae), and other weeds growing in fallow fields or meadows as source hosts of an important native pest of rice, stenotus rubrovittatus (matsumura) (hemiptera: miridae), in an agricultural landscape of northern japan. periodical censuses of this mirid bug by using the sweeping method, vegetat ... | 2011 | 22251715 |
| landscape effects of a non-native grass facilitate source populations of a native generalist bug, stenotus rubrovittatus, in a heterogeneous agricultural landscape. | non-native plant species can provide native generalist insects, including pests, with novel food and habitats. it is hypothesized that local and landscape-level abundances of non-native plants can affect the population size of generalist insects, although generalists are assumed to be less sensitive to habitat connectivity than specialists. in a heterogeneous landscape in japan, the relationship between the density of a native pest of rice (stenotus rubrovittatus (matsumura) (heteroptera: mirida ... | 2014 | 25205015 |