| [a preliminary study on bioactivity of orange and tangerine peel extracts against aphis and mites]. | an assay was made on the bioactivity of the extracts of tangerine peel from cinocitrus tangerina, orange peel from citrus sinensis and mixed tangerine peel from cinocitrus sp. against aphis semia phis heraclei, aphis craccivora, uroleucon gobonis and myzus persicae using residual film or topical method, and against mites tetranychus viennensis and t. trancatus using slide-dip or immersion method. test results show that these extracts have strong bioactivity against aphids and mites. the correcte ... | 1995 | 7576134 |
| 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 |
| [quantitative analysis of insect pest and natural enemy communities in red fuji apple orchard]. | the insect pest and natural enemy communities in red fuji apple orchard in mouping district of yantai city were quantitatively analyzed by multivariate analysis. the temporal structure of the communities was grouped into five continuous stages by using optimal sorting method, and the community characteristics at each stage were described. the dominant pests and natural enemies were determined at different growth stages of apple trees through analyzing the sub-communities of the insect pests and ... | 2009 | 19565766 |
| [study on the physiological activities of the metabolites from paecilomyces arovirens]. | the metabolites of paecilomyces arovirens exhibited insecticidal activities to many inscct pcsts, including cotton aphid, aphis gossypii, hawthorn ispidcr mitc, tetranychus viennensis and larvae of imported cabbage worm, pietis rapae. a comparison was made between the metabolites of p. arovirens and naphthyl acetic acid (naa) in wheat (triticum aestivum) and water melon (cucumis sativus) bioassays on their physiological effects. results demonstrated that some of the metabolites physiological act ... | 1998 | 12549393 |
| acaricidal activity of juglans regia leaf extracts on tetranychus viennensis and tetranychus cinnabarinus (acari: tetranychidae). | leaf extracts of the walnut, juglans regia l., were evaluated under laboratory conditions to determine their acaricidal activity on the mites tetranychus cinnabarinus (boisduval) and tetranychus viennensis zacher (acari: tetranychidae). extracts had both contact and systemic toxicity to these mites. the four solvents tested for preparing crude extracts were petroleum ether, chloroform, ethyl acetate, and methanol. methanol was the most efficient solvent, with an extraction rate from 17.06 + 0.80 ... | 2007 | 17849883 |
| acaricidal activities of extracts of kochia scoparia against tetranychus urticae, tetranychus cinnabarinus, and tetranychus viennensis (acari: tetranychidae). | extracts of an annual herbaceous plant, kochia scoparia (l.) schrad (macrophomina), were bioassayed to determine their acaricidal activities against tetranychus urticae koch, tetranychus cinnabarinus (boisduval), and tetranychus viennensis zacher (acari: tetranychidae) in the laboratory. extracts had both contact and systemic toxicity to these mites. three solvents were tested for preparing crude extracts: petroleum ether, chloroform, and methanol. methanol was the most effective solvent, extrac ... | 2006 | 16813322 |
| assessment of the contact toxicity of methyl palmitate on tetranychus viennensis (acari: tetranychidae). | previous work demonstrated that methyl palmitate possesses acaricidal activity against tetranychus viennensis boisduval (acari: tetranychidae) via an unknown mechanism. here, the symptoms of methyl palmitate toxicity to t. viennensi were studied to determine the acaricidal mechanism of action of this fatty acid methyl ester. methyl palmitate caused concentration-dependent mortality of t. viennensis, with a moderate concentration (5 mg/ml) eliciting excitement and premature oviposition without sp ... | 2010 | 20857750 |
| [effects of tagetes erecta extracts on glutathione s-transferase and protease activities and protein content in tetranychus viennensis]. | with in vivo and in vitro tagetes erecta roots under light and dark as test materials, this paper studied the effects of their extracts on the glutathione s-transferase and protease activities and protein content in tetranychus viennensis. the results showed that the chloroform extract of t. erecta roots had the highest light-activated activity, followed by water extract, and methanol extract. after treated with chloroform extract, the glutathione s-transferase and protease activities in t. vien ... | 2007 | 17450747 |
| acaricidal activities of extracts of stellera chamaejasme against tetranychus viennensis (acari: tetranychidae). | extracts of a perennial and poisonous weed, stellera chamaejasme l. (thymelaeaceae) were bioassayed to determine their acaricidal activities against tetranychus viennensis zacher (acari: tetranychidae) in the laboratory. extracts had both contact and systemic toxicity to the mite. after liquid chromatography and thin layer chromatography, the extract was further concentrated, separated, and bioassayed. this study is the first to report the acaricidal property of s. chamaejasme and its potential ... | 2004 | 15666744 |