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  • Lepidoptera  (4)
  • Cell & Developmental Biology  (2)
  • Onion fly  (2)
  • 1
    Electronic Resource
    Electronic Resource
    The influence of tactile and other non-chemical factors on the ovipositional responses of the generalist herbivore Epiphyas postvittana (1997)
    Springer
    Entomologia experimentalis et applicata 83 (1997), S. 147-159 
    Details
    ISSN: 1570-7458
    Keywords: Lepidoptera ; Tortricidae ; visual stimuli ; tactile stimuli ; generalist
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A bioassay to test the ovipositional responses of the generalist herbivore, Epiphyas postvittana, was developed, and various non-chemical factors that influenced the laying, and number of eggs laid, by females were tested. In choice experiments using various models, surface texture was found to be an important factor influencing ovipositional behaviour, with females preferring to lay on smoother rather than rougher surfaces. Another surface texture feature that influenced oviposition was a raised wax ridge on a smooth surface. The wax ridge stimulated more eggs to be laid within close proximity to the ridge. Observations of females showed that the increased numbers of eggs laid on models with a wax ridge resulted not from increased landing, time spent, or numbers of eggs laid per ovipositional bout, but rather through an increased probability of ovipositing after landing on models with a wax ridge compared to models without the ridge. Spatial features of the models were also found to influence egglaying by females. Females showed a tendency to lay on the upper rather than the lower surface of models, although this appeared to depend upon how stimulatory the upper surface of the model was. Females also laid more eggs on models with a dense array of leaves than on models with a more spread-out array.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002959605202
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Responses ton-dipropyl disulfide by ovipositing onion flies: Effects of concentration and site of release (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 1261-1277 
    Details
    ISSN: 1573-1561
    Keywords: Onion fly ; onion maggot ; Delia antiqua ; Hylemya antiqua ; Diptera ; Anthomyiidae ; host selection ; oviposition ; dipropyl disulfide ; behavior ; herbivore ; plant-insect interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Onion fly females,Delia antiqua (Diptera: Anthomyiidae) laid the most eggs on ovipositional dishes havingn-dipropyl disulfide (Pr2S2) release rates of 1–6 ng/sec from polyethylene capsules placed beneath a sand substrate. When dipropyl disulfide was released from the wax coating of surrogate foliage rather than from the substrate, ovipositing females again responded differentially to various concentrations, laying more eggs around stems containing 0.075 and 0.089 mg/stem. Factorial combinations of several concentrations released from surrogate foliage and substrate showed that releases from surrogate foliage stimulated four times more egg-laying than releases from the substrate. Females tended to lay more eggs around surrogate stems having Pr2S2 at the base rather than on the upper half of foliage. Observations of individual females performing preovipositional examining behaviors on Pr2S2-treated surrogate stems indicated that females tended to land on the upper portions of the foliage, but after landing, spent most of their time examining areas of soil and surrogate within 1 cm of the soil-surrogate foliage interface. Surrogate stems provide a realistic context for investigating effects of plant chemicals on host-acceptance behaviors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020553
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Onion fly egg distribution in soil: a new sampling method and the effect of two granular insecticides (1992)
    Springer
    Entomologia experimentalis et applicata 63 (1992), S. 283-289 
    Details
    ISSN: 1570-7458
    Keywords: Onion fly ; Delia antiqua ; Anthomyiidae ; egg distribution ; soil sampling ; agar infusion ; insecticide ; Lorsban™ 15 G ; chlorpyrifos ; Dyfonate™ 15 G ; fonofos ; ovipositional behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A method for rapidly determining the vertical and horizontal distribution of insect eggs in fragile soil is described. Liquefied agar is allowed to permeate intact soil samples from below; after cooling, the resulting solid is cut into thin sections, from which eggs can be recovered by washes with hot water. This technique revealed that in organic (muck) soil in the laboratory, undisturbed onion flies, Delia antiqua (Meigen) (Diptera: Anthomyiidae), laid 95% of their eggs within a 10 mm diameter zone around the base of a surrogate onion ‘stem’ arising vertically from the soil. Ninety % of all eggs were found in the top 12 mm of soil, with an apparent maximum at depth of 2–4 mm. Increasing fly density from 30 to 200 flies per 30×30×42 cm cage flattened the horizontal distribution of eggs and extended the ovipositional range from c. 15 mm to beyond 60 mm, suggesting there was competition for the preferred ovipositional sites. Surface treatment of muck soil in the field by granular formulations of the insecticides Lorsban™ 15 G (active ingredient chlorpyrifos) and Dyfonate™ 15 G (fonofos) three weeks prior to bioassaying reduced egg-laying at depths greater than 8 mm. The relation between the measured egg distribution and mortality factors in soil (low moisture and high temperature) is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192777
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  • 4
    Electronic Resource
    Electronic Resource
    Visual behaviour of neonata larvae of the light brown apple moth (1995)
    Springer
    Entomologia experimentalis et applicata 77 (1995), S. 323-334 
    Details
    ISSN: 1570-7458
    Keywords: Lepidoptera ; Tortricidae ; Epiphyas postvittana ; orientation ; movement ; colour ; stemmata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When neonate larvae of a leafroller moth,Epiphyas postvittana (Walker) (Lepidoptera: Tortricidae) were released into the middle of a circular arena with blue paper on one side of the arena and apple foliage on the other side, more larvae walked towards the apple foliage. These oriented responses were enhanced, in terms of the number of larvae responding, by increasing the amount of light reflected from or transmitted through apple foliage. Larvae also responded to painted targets, and specifically to targets reflecting light in the region of 470–570 nm (green-yellow region to the human eye). When the amount of 470–570 nm reflected from targets was reduced, numbers of larvae responding to targets decreased. The addition of 400–500 nm reflected light to 470–570 nm reflected light also resulted in a reduction of oriented responses to targets. Tests using neutral colours (white, black, and a series of greys) indicated that, in the absence of targets reflecting primarily in the 470–570 nm region, larvae oriented towards targets with low levels of reflectance. When the orientation of walking larvae was measured at various distances from targets of different colours or diameters, targets subtending 5–8 degrees elicited responses from 50% of all larvae. Behaviour other than walking was also influenced by visual stimuli: fewer larvae spun down on a silken thread when blue paper was placed beneath a walking platform than when brown or green papers were present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383067
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Behavioral responses of lightbrown apple moth neonate larvae on diets containing Bacillus thuringiensis formulations or endotoxins (1997)
    Springer
    Entomologia experimentalis et applicata 84 (1997), S. 207-219 
    Details
    ISSN: 1570-7458
    Keywords: behavior ; feeding ; movement ; walking ; endotoxin ; Lepidoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Behavioral responses of individual lightbrown apple moth, Epiphyas postvittana (Walker), neonate larvae to Dipel or the Bacillus thuringiensis delta endotoxins CryIAc and CryIBa incorporated into artificial diets were measured in choice and no-choice treatments. Frass production and the spinning of silken shelters were delayed when larvae were given diets containing Dipel or Bt endotoxins. In choice treatments larvae did not exhibit an initial preference for control diets over diets with Dipel or Bt endotoxins but accumulated on control diets over a period of days, apparently because larvae that first settled on Dipel or endotoxin diets abandoned diets while larvae that fed on control diets remained on diets throughout the experiment. Abandonment of diets containing Dipel or endotoxins was also apparent in no-choice treatments. Larvae exposed to such diets were more likely to be observed walking or at different sites from one observation to the next, and produced frass and silken feeding shelters at multiple sites rather than a single site. The implications of these findings for the use of B. thuringiensis as a commercial spray or for the use of B. thuringiensis endotoxin genes as resistance factors to be expressed in transgenic apples are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003039630691
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Factors influencing the landing of maleEpiphyas postvittana (Walker) exhibiting pheromone-mediated flight (Lepidoptera: Tortricidae) (1992)
    Springer
    Journal of insect behavior 5 (1992), S. 699-720 
    Details
    ISSN: 1572-8889
    Keywords: sex pheromone ; landing behavior ; visual cues ; Epiphyas postvittana ; Lepidoptera ; Tortricidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of changes in various visual and olfactory properties of a white card surface on the landing position of male Epiphyas postvittanaexhibiting pheromone-mediated flight were studied in a wind tunnel. Males landed predominantly at the most downwind position of a surface in line with the pheromone source, regardless of the strength of the source. The position on the surface that males landed was strongly influenced by visual factors. The landing position of males appeared to be influenced by visual cues along all three axes of the surface. Decreases in either the dimension horizontally perpendicular to the wind direction or the vertical dimension resulted in greater numbers of males landing farther upwind on the surface than the downwind edge. Visual changes in the axis along the wind direction also affected the position at which males landed. For example, when presented with two white card surfaces with a 4- cm gap between them, males tended to land on the downwind edge of the upwind surface (on which the source was located). When the gap was bridged with clear Mylar, the landing pattern was significantly different, with the greater proportion of males landing on the downwind surface. However, when Mylar was placed on the plexiglass floor of the tunnel (in addition to bridging the gap), the landing pattern on the surface was not significantly different from that on the two surfaces without the Mylar bridge. It is suggested that during the prelanding and landing phases of pheromone-mediated flight, male moths orient to visual features of the surface containing the pheromone source rather than to visual features of the source (conspecific female moth) itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01047981
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    On the structure of two fish tapeworms from the genus proteocephalus Weinland 1858Studies from the Zoölogical Laboratory, The University of Nebraska, under the direction of Henry B. Ward, No. 33. (1900)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 16 (1900), S. 337-368 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050160204
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Tyrosine phosphorylations specific to mitosis in human and hamster cells (1995)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 57 (1995), S. 351-361 
    Details
    ISSN: 0730-2312
    Keywords: cell cycle ; cell division ; protein phosphorylation ; phosphotyrosine ; caffeine ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Changes in protein tyrosine phosphorylation are known to be important for regulating cell cycle progression. With the aim of identifying new proteins involved in the regulation of mitosis, we used an antibody against phosphotyrosine to analyze proteins from synchronized human and hamster cells. At least seven proteins were found that displayed mitosis-specific tyrosine phosphorylation in HeLa cells (pp165, 205, 240, 250, 270, 290, and ∼ 400) and one such protein in hamster BHK cells (pp155). In synchronized HeLa and BHK cells, all proteins except HeLa pp165, pp205, and pp250 were readily detectable only in mitosis. Tyrosine phosphorylation of pp165, pp205, and pp250 was apparent during arrest in S phase, suggesting that cell cycle perturbations can affect the phosphorylation state of some of these proteins. In a related finding in BHK cells, pp155 underwent tyrosine phosphorylation when cells were forced into premature mitosis by caffeine treatment. Only one protein (pp135 in HeLa cells) was found to be dephosphorylated on tyrosine during mitosis. The above findings may prove helpful for isolating new cell cycle proteins that are important for both the normal regulation of mitosis and the mitotic aberrations associated with cell cycle perturbations and chemical treatments.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240570219
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    Paper (German National Licenses)
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