| life history of hawthorn spider mite amphitetranychus viennensis (acarina: tetranychidae) on various apple cultivars and at different temperatures. | development duration and reproduction rate of hawthorn spider mite amphitetranychus viennensis (zacher) were carried out on five different apple cultivars (amasya (local cultivar), golden delicious, granny smith, starking delicious and starkrimson delicious) at 25 degrees c, 65 +/- 10% rh and 16:8 l:d. in addition, the same parameters were determined on golden delicious leaves at three constant temperatures (20, 30 and 35 degrees c, 65 +/- 10% rh and 16:8 l:d) in the laboratory. a. viennensis sh ... | 2003 | 14756403 |
| predation by allothrombium pulvinum on the spider mites tetranychus urticae and amphitetranychus viennensis: predation rate, prey preference and functional response. | the deutonymphs of allothrombium pulvinum ewing (acari: trombidiidae) are among the most important natural enemies of spider mites in north, north east and west iran. in this study, maximum predation rate and preference experiments were conducted with a. pulvinum deutonymphs on apple leaf discs, to determine their preference for either of two spider mite species: amphitetranychus viennensis (zacher) and tetranychus urticae koch (acari: tetranychidae). maximum predation rate tests showed that the ... | 2005 | 16323049 |
| assessment of sublethal effects of clofentezine on life-table parameters in hawthorn spider mite (tetranychus viennensis). | a leaf disc bioassay was employed in the laboratory to assess the population responses of tetranychus viennensis zacher to clofentezine at three concentrations (lc(10), lc(25) and lc(50)) in three successive generations. life-table parameters were calculated in each acaricide exposure regime and compared by jackknife procedures. clofentezine treatments in the juvenile stages significantly delayed development of the mites, and this delay increased with increasing dose but decreased as the mites d ... | 2006 | 16612669 |
| effect of host plants on developmental time and life table parameters of amphitetranychus viennensis (acari: tetranychidae). | the effect of host plant species including black cherry (prunus serotina cv. irani), cherry (prunus avium cv. siahe mashhad) and apple (malus domestica cv. shafi abadi) was studied on biological parameters of amphitetranychus viennensis (zacher) in the laboratory at 25 +/- 1 degrees c, 70 +/- 10% rh and 16l: 8d photoperiod. duration of each life stage, longevity, reproduction rate, the intrinsic rate of natural increase (rm), net reproductive rate (r0), mean generation time (t), doubling time (d ... | 2007 | 17710558 |
| olfactory response of the predator zetzellia mali to a prey patch occupied by a conspecific predator. | while searching for food, predators may use volatiles associated with their prey, but also with their competitors for prey. this was tested for the case of zetzellia mali (ewing) (acari: stigmaeidae), an important predator of the hawthorn spider mite, amphitetranychus viennensis (zacher) (acari: tetranychidae), in black-cherry orchards in baraghan, iran. using a y-tube olfactometer, the response of this predatory mite was tested to odour from black-cherry leaves with a conspecific female predato ... | 2007 | 17952612 |
| permanent genetic resources added to molecular ecology resources database 1 january 2009-30 april 2009. | this article documents the addition of 283 microsatellite marker loci to the molecular ecology resources database. loci were developed for the following species: agalinis acuta; ambrosia artemisiifolia; berula erecta; casuarius casuarius; cercospora zeae-maydis; chorthippus parallelus; conyza canadensis; cotesia sesamiae; epinephelus acanthistius; ficedula hypoleuca; grindelia hirsutula; guadua angustifolia; leucadendron rubrum; maritrema novaezealandensis; meretrix meretrix; nilaparvata lugens; ... | 2009 | 21564911 |
| species-wide homogeneity of nuclear ribosomal its2 sequences in the spider mite tetranychus urticae contrasts with extensive mitochondrial coi polymorphism. | we compared patterns of intraspecific polymorphism of two markers with contrasted modes of evolution, nuclear ribosomal dna (rdna) and mitochondrial dna (mtdna), in the phytophagous mite tetranychus urticae koch. the second internal transcribed spacer (its2) of rdna and a fragment in the mtdna gene coding for cytochrome oxidase i (coi), were pcr-amplified and sequenced in samples of various geographical origins distributed worldwide. the 15 coi haplotypes found fell into two major phylogenetic l ... | 1998 | 9675873 |