| aggregation and mortality of agriotes obscurus (coleoptera: elateridae) at insecticide-treated trap crops of wheat. | agriotes obscurus (l.) wireworms assembled in increasing numbers at rows of treated (agrox dl plus seed treatment) and untreated wheat, triticum aestivum l., planted at increasing densities (0, 0.15, 0.30, and 0.60 seeds/cm). in treated wheat plots at all planting densities, no wireworm damage to seedlings was apparent, and total wireworms taken in core samples in wheat rows increased according to the asymptotic equation y = b0(1 -e(-blx)), where b0 is the asymptote, b1 is the slope of the initi ... | 2005 | 16539125 |
| spinosad interacts synergistically with the insect pathogen metarhizium anisopliae against the exotic wireworms agriotes lineatus and agriotes obscurus (coleoptera: elateridae). | we determined that spinosad interacts synergistically with the biocontrol agent metarhizium anisopliae (metch) sorokin to increase the mortality of two wild-collected wireworm species, agriotes lineatus (l.), and agriotes obscurus (l.). bioassays were performed using a m. anisopliae isolate originally acquired from a local wireworm cadaver. m. anisopliae was applied as a soil drench at 3.3 x 10(2) and 10(4) conidia per gram sand, respectively. soil drenches also were prepared using a commercial ... | 2007 | 17370806 |
| occurrence of agriotes wireworms in austrian agricultural land. | agriotes wireworms (coleoptera: elateridae) are abundant soil-dwelling herbivores which can inflict considerable damage to field crops. in europe up to 40 species occur, differing in their ecology and pest status. their distribution in the larval stage, however, has rarely been assessed because of the considerable effort in collecting wireworms and the difficulties in identifying them to species-level. here, we examined the occurrence of agriotes wireworms in austrian agricultural land with rega ... | 2011 | 23459669 |
| determination of distribution of harmful click beetle species (coleoptera, elateridae) by synthetic sex pheromones. | by means of pheromone traps containing synthetic sex pheromones, areas of the most harmful click beetle species,agriotes obscurus,a. lineatus, a. sputator, a. gurgistanus, a. ustulatus, a. tauricus heyd, anda. lineatus, occurring in southern regions and differing biologically from the so-called northern species, have been specified and charted in the european and central siberian areas of the former ussr. | 1993 | 24249228 |
| further studies on wireworm management in canada: damage protection versus wireworm mortality in potatoes. | the efficacy of various insecticides and application methods in protecting potatoes from wireworm (agriotes obscurus l.) damage as well as reducing wireworm populations was studied over 5 yr in agassiz, british columbia. protection from wireworm damage was measured by the number of blemishes to daughter tubers, and effects on wireworm populations were measured by sampling soil around seed potatoes and/or by bait traps the following spring. organophosphates registered for wireworm control in the ... | 2013 | 23786066 |
| how generalist herbivores exploit belowground plant diversity in temperate grasslands. | belowground herbivores impact plant performance, thereby inducing changes in plant community composition, which potentially leads to cascading effects onto higher trophic levels and ecosystem processes and productivity. among soil-living insects, external root-chewing generalist herbivores have the strongest impact on plants. however, the lack of knowledge on their feeding behaviour under field conditions considerably hampers achieving a comprehensive understanding of how they affect plant commu ... | 2014 | 24188592 |
| [effects of the vital activity of soil insect larvae on microbial processes in the soil]. | the effects of elateridae larvae (wireworms) on the structure, functional diversity, and tolerance of the soil microbial population in steppe ecosystems have been investigated. the trophic and locomotor activity of wireworms leads to an appreciable increase in bacterial abundance and suppression of fungal activity. the fungal hyphae in the presence of wireworms are significantly damaged, which can be related to the feeding activity of elateridae. the increase of bacterial abundance on the backgr ... | 2016 | 26852485 |
| climatic, edaphic factors and cropping history help predict click beetle (coleoptera: elateridae) (agriotes spp.) abundance. | it is assumed that the abundance of agriotes wireworms (coleoptera: elateridae) is affected by agro-ecological factors such as climatic and edaphic factors and the crop/previous crop grown at the sites investigated. the aim of this study, conducted in three different geographic counties in croatia from 2007 to 2009, was to determine the factors that influence the abundance of adult click beetle of the species agriotes brevis cand., agriotes lineatus (l.), agriotes obscurus (l.), agriotes sputato ... | 2015 | 26175463 |
| stable isotope analysis reveals whether soil-living elaterid larvae move between agricultural crops. | tracking the movement of soil-living herbivores is difficult, albeit important for understanding their spatial ecology as well as for pest management. in this study the movement of agriotes obscurus larvae between plots harbouring isotopically different plants was examined. neither between maize and wheat nor between maize and grassland movement could be detected. these data suggest that agriotes larvae rarely disperse between crops as long as local food supply is sufficient. moreover, the curre ... | 2011 | 21760645 |
| mortality of a wireworm, agriotes obscurus (coleoptera: elateridae), after topical application of various insecticides. | ten insecticides representing seven chemical groups were applied at various concentrations topically by using a potter spray tower to evaluate their relative toxicities on the european wireworm agriotes obscurus l. (coleoptera: elateridae). wireworms were stored at 15 degrees c after exposure to organophosphate (op) (chlorpyrifos, diazinon), pyrethroid (tefluthrin), thianicotinoid (thiamethoxam, clothianidin), chloronicotinoid (imidacloprid, acetamiprid), phenyl pyrazole (fipronil), organochlori ... | 2008 | 18459401 |
| transitional sublethal and lethal effects of insecticides after dermal exposures to five economic species of wireworms (coleoptera: elateridae). | during an insecticide toxicity study involving field-collected dusky wireworm, agriotes obscurus (l.) (coleoptera: elateridae), wireworms exposed dermally to six classes of insecticides exhibited characteristic transitional symptoms of toxicity. these symptoms, collectively termed "morbidity," were categorized as "writhing," "leg and mouthpart movements," or "mouthpart-only body movements." these symptoms could persist for long periods, depending on insecticide and dose, with morbid wireworms ul ... | 2008 | 18459400 |
| repellency of a wireworm, agriotes obscurus (coleoptera: elateridae), on exposure to synthetic insecticides in a soil-less bioassay. | a soil-less bioassay arena to test repellency of wireworms (a. obscurus) to insecticides and carrier solvents is described. the bioassay and variables measured distinguish between shorter-range (contact and/or volatile) and longer-range (volatile) repellency. wireworm positions are recorded every 3 s for 20 min, and average speed, rate of slowing, and longer- and shorter-range repellent behaviors calculated. shorter-range repellency is determined with a wireworm repellency score (wrs, range 0-10 ... | 2008 | 18419927 |
| soil bioassay for studying behavioral responses of wireworms (coleoptera: elateridae) to insecticide-treated wheat seed. | a bioassay for observing wireworm behavior in soil is described. the bioassay permits analysis of orientation, feeding, repellency, and postcontact toxicity behaviors of wireworms in response to insecticide-treated wheat seeds. wireworm positions were recorded every 5 min for 3 h, and the time required to orient to and contact seeds, and the duration of individual feeding events, was calculated. both avoidance (before contact with seeds) and repellency (after contact) were quantified. a high pro ... | 2007 | 18284772 |
| environmental and behavioral constraints on the infection of wireworms by metarhizium anisopliae. | environmental and behavioral factors that affect the infection of wireworms [agriotes obscurus l. (coleoptera: elateridae)] by a unique isolate of metarhizium anisopliae sorokin (hypocreales: clavicipitaceae) were studied. after wireworms were placed in soil containing 10(6) m. anisopliae conidia/g and incubated at 6, 12, or 18 degrees c, significant disease development and wireworm mortality occurred only in those wireworms incubated at 18 degrees c. at this temperature, mortality was found to ... | 2007 | 18284769 |
| evaluation of pheromones and a new trap for monitoring agriotes lineatus and agriotes obscurus in the fraser valley of british columbia. | a prototype ground-based pheromone trap design, baited with various pheromone lures, was field tested for effectiveness in trapping male agriotes obscurus and agriotes lineatus click beetles in british columbia. pheromone dispensers containing geranyl octanoate and geranyl hexanoate in a 1:1 ratio caught the greatest numbers of a. obscurus, whereas those containing geranyl octanoate and geranyl butanoate in a 9 or 10:1 ratio caught high numbers of a. lineatus. some differences in a. obscurus att ... | 2007 | 17191156 |
| insecticidal activity of selected monoterpenoids and rosemary oil to agriotes obscurus (coleoptera: elateridae). | acute toxicities of three naturally occurring monoterpenoid essential oil constituents and the essential oil of rosemary were tested against late instars of agriotes obscurus (l.) (coleoptera: elateridae). both contact and volatile toxicities of thymol, citronellal, eugenol, and rosemary oil were determined. also, phytotoxicity of these compounds was evaluated on corn germination and seedling development. thymol had the greatest contact toxicity (ld50 = 196.0 microg/larva), whereas citronellal a ... | 2005 | 16334324 |