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  • Delia antiqua  (11)
  • Coleoptera  (8)
  • systematics
  • Springer  (20)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 54 (1990), S. 37-42 
    ISSN: 1570-7458
    Keywords: Insecta ; Delia antiqua ; onion fly ; oviposition ; soil temperature ; air temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé La température du sol est réglée, dans les pondoirs de D. antiqua, par un thermoblock, tandis que toutes les autres variables, associées au succédané d'oignon servant de stimulus de ponte, sont maintenues constantes. Une relation causale entre température du sol et activité de ponte est mise en évidence. Quand il y a choix entre des substrats de ponte à 5, 15, 22, 30 et 40°C, avec une température de l'air de 22°C, les mouches pondent surtout dans le substrat à 22°C. L'optimum thermique est de 20°C quand la température de l'air est abaissée à 15°C. La ponte n'est que de 50 œufs quand la température de l'air est portée à 30°C, contre respectivement 454 et 1128 œufs à 22 et 15°C. Ainsi, une température de l'air de 30°C paraît proche de la limite supérieure de l'activité de ponte de D. antiqua. Le nombre de mouches observées sur le substrat (toutes les 15 min.) ne varie pas significativement quand la température du substrat est entre 15 et 40°C. La gamme de températures provoquant la fixation sur le substrat est plus large que celle des températures provoquant une ponte importante. L'optimum de 20°C correspond bien aux températures favorables à la survie et à la croissance de D. antiqua. Ce travail montre l'effet important de facteurs abiotiques sur l'acceptation de la plante-hôte.
    Notes: Abstract A direct causal relationship was demonstrated between soil temperature and insect ovipositional propensity. When ovipositional substrates (soils) at 5, 15, 22, 30, 35, and 40°C were presented in multiple treatment (‘choice’) tests with air temperature at 15 or 22°C, onion flies, Delia antiqua (Meigen) (Diptera: Anthomyiidae), laid the most eggs in the 22°C substrate. Only 50 eggs were laid when air temperature was increased to 30°C, as compared to 454 and 1128 eggs at 22 and 15°C, respectively. Thus, an air temperature of 30°C appears to be near the upper limit of onion fly ovipositional activity. The numbers of flies observed (counts taken every 15 min) on substrates ranging from 15 to 40°C were not significantly different. Reduced alightment/arrestment does not explain reduced oviposition on the warmer substrates; however, it may partly explain reduced oviposition on 5°C substrates. The range of substrate temperatures facilitating substantial oviposition was narrower than that eliciting alightment/arrestment on the substrate. The ca. 20°C ovipositional optimum corresponds well with temperatures favoring egg survival and development.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 63 (1992), S. 283-289 
    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.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of insect behavior 4 (1991), S. 773-792 
    ISSN: 1572-8889
    Keywords: Delia antiqua ; Anthomyiidae ; Diptera ; herbivore ; egg-laying ; host-finding ; sensory systems ; chemoreception ; n-dipropyl disulfide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Behavioral responses of female onion flies, Delia antiqua (Meigen), to hostplant cues were quantified during encounters of individual flies with onion plants and onion foliar surrogates. The behavioral repertoire of such females included sitting, grooming, running up and down foliar surfaces, extension of the proboscis such that the labellum contacted foliar and soil surfaces, movements of the tip of the abdomen over surfaces (surface probing), subsurface probing of soil crevices with the ovipositor, and oviposition. Sequences of behaviors preceding oviposition were probabilistic rather than highly stereotyped but generally followed the order given above. Foliar surrogates were used to determine the effects of n-dipropyl disulfide (Pr2S2) on the sequence of behaviors leading up to oviposition. The addition of a Pr2S2-treated surrogate to a cage increased the frequency of alighting on that surrogate but also increased alighting on a nearby foliar surrogate without Pr2S2. After alighting, females encountering surrogates treated with Pr2S2 had shorter latencies to proboscis extension and surface probing, spent less time sitting and grooming, and had runs of shorter duration. These females were also more likely to make the transition from probing of surfaces of foliage and soil to subsurface probing of soil crevices and oviposition. Thus, rather than mediating a particular step in the behavioral sequence, Pr2S2 played a role throughout the sequence leading up to oviposition. Collectively, these data and past studies on the onion fly support the hypothesis that egglaying is triggered by a temporal summation of inputs to the central nervous system from various sensory modalities rather than strict behavioral chaining, with each transition effected by some unique cue.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 43 (1987), S. 279-286 
    ISSN: 1570-7458
    Keywords: Delia antiqua ; Hylemya ; Anthomyiidae ; onion fly ; antixenosis ; oviposition behaviour ; plant-insect interactions ; resistance ; host-plant stimuli
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé A la lumière d'opinions récentes concernant la découverte des plantes-hôtes par D. antiqua, nous avons examiné les conditions de la ‘résistance’ chez plusieurs lignées de A. cepa les moins attaquées lors d'essais en plein champ aux Pays-Bas, et dont on considérait que la ‘résistance’ était due à une antixénose. Des femelles gravides en présence, au laboratoire, d'un choix de plants de 6 semaines, pondent en moyenne 1,6 à 34,8 oeufs par plant. Les différences entre les pontes correspondent aux tailles des plants. Si l'on tient compte de ces dernières, l'analyse de covariance ne montre pas de différence significative entre les pontes sur les différentes lignées. Des substituts de feuilles ont été créés de façon à faire varier les paramètres de taille tout en maintenant constants les autres stimuli de la plante: pour des plantes, dont le diamètre à la base variait de 1 à 4 mm et la hauteur de 100 à 350 mm, seul le diamètre a significativement influé sur la ponte. Les pontes sur les plantes hors de ces dimensions n'ont pu être expliquées par les seules différences de diamètre. Comme les paysans des principales régions productrices d'oignons d'Europe et des U.S.A. font des bénéfices importants avec la culture d'oignons précoces, ces lignées, sélectionnées par mégarde pour leur développement lent, ne sont probablement pas une bonne source de ‘résistance’ à la mouche de l'oignon. Cependant, ces résultats soulignent la nécessité de tenir autant compte de la taille de la plante que de son chimisme ou de sa texture lors de l'évaluation et de la création de cultivars résistants.
    Notes: Abstract When gravid onion fly females, Delia antiqua (Meigen) (Diptera: Anthomyiidae) were presented in laboratory choice test with 6-week-old plants of a susceptible cultivar and of onion breeding lines selected for resistance, mean numbers of eggs laid ranged from 34.8 to 1.6 eggs per plant. Differences in ovipositional responses were mirrored by differences in plant size. Analysis of covariance revealed no significant differences in ovipositional responses to breeding lines when differences in size were taken into account. Foliar surrogates were developed so that single size parameters could be varied while holding all other plant stimuli constant. Tests using these surrogates revealed that among plants with basal diameters of 1 to 4 mm and heights of 100 to 350 mm, diameter alone significantly influenced responses of ovipositing females. Ovipositional responses to plants beyond this size range could not be explained strictly by diameter differences. These results underscore the necessity of considering plant size as well as plant chemistry and texture in efforts to evalute and design resistant cultivars.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 38 (1985), S. 151-155 
    ISSN: 1570-7458
    Keywords: Onion maggot ; onion fly ; Delia antiqua ; feeding preference ; Allium cepa ; plant nitrogen ; insect/plant interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When given a choice of feeding sites in laboratory arenas, Delia antiqua (Meigen) larvae exhibited a 3: 1 bias for internal vs outer sections of onion bulbs and distributed themselves non-randomly among identical preferred onion sections. Larval clustering did not appear to be correlated with increased fitness in the laboratory; larval development was identical across the range of densities from 1 to 50 larvae per onion. Larvae feeding on preferred internal sections developed 14% faster, were 38% heavier upon pupation, and were two times more likely to survive to the adult stage than larvae feeding on outer sections. D. antiqua larval food preference was therefore positively correlated with increased fitness.
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  • 6
    ISSN: 1573-1561
    Keywords: Chiral semiochemicals ; pheromones ; enantiomeric composition ; Ips pini ; Coleoptera ; Scolytidae ; Apis mellifera ; Hymenoptera ; apidae ; Cryptolestes Ferrugineus ; Cucujidae ; acetyl lactate diastereoisomers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A method is described for determining the enantiomeric composition of chiral alcohols, lactones, and hydroxy acids in quantities ranging from 25 ng to 10 μg. Derivatization of the substance with chirally pure acetyl lactate, followed by splitless capillary gas chromatography, enables enantiomeric determinations to be made within 1–3% of the actual value. This technique was applied in the determination of semiochemical inIps pini (Say),Apis mellifera (L.), andCryptolestes ferrugineus (Stephens). The results indicate that considerable variability exists within populations of some insects in the composition of their chiral semiochemicals, whereas others produce substances of constant composition.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 15 (1989), S. 719-730 
    ISSN: 1573-1561
    Keywords: Onion fly ; Delia antiqua ; Diptera ; Anthomyiidae ; oviposition ; deterrent ; capsaicin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In laboratory choice experiments, the spices dill, paprika, black pepper, chili powder, ginger, and red pepper deterredDelia antiqua oviposition by 88–100%. Dose-response choice tests demonstrated that 1 mg of ground cayenne pepper (GCP) placed within 1 cm of artificial onion foliage reduced oviposition by 78%. A synthetic analog of capsaicin, the principal flavor ingredient of red peppers, deterred oviposition by 95% when present at 320 ppm in the top centimeter of sand (the ovipositional substrate). However, in no-choice conditions 10 mg GCP was not an effective deterrent. Sevana Bird Repellent and Agrigard Insect Repellent both use red pepper as a principal ingredient; at recommended field rates, neither of these materials was an effective ovipositional deterrent either in laboratory or field. Capsaicin-based materials do not appear to be candidates for onion maggot control via behavioral modification.
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  • 8
    Electronic Resource
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    Springer
    Journal of chemical ecology 17 (1991), S. 1517-1527 
    ISSN: 1573-1561
    Keywords: Pheromone ; ipsenol ; cis-verbenol ; chirality ; Ips latidens ; Coleoptera ; Scolytidae ; predator ; kairomone ; Enoclerus sphegeus ; Thanasimus undatulus ; Cleridae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Ipsenol was identified from the frass of male, but not female,Ips latidens from British Columbia, feeding in phloem tissue of lodgepole pine,Pinus contorta var.latifolia. The responses ofJ. latidens to sources of ips-enol andcis-verbenol were determined with multiple-funnel traps in stands of lodgepole pine in British Columbia. Ipsenol attracted both male and femaleI. latidens, verifying that it is a pheromone for this species. MaleI. latidens showed a slight preference for (S)-(−)-ipsenol.cis-Verbenol was not produced by beetles of either sex and, in contrast to an earlier report, both enantiomers inhibited attraction to ipsenol-baited traps. The predators,Enoclerus sphegeus andThanasimus undatulus (Cleridae), were attracted to traps baited withcis-verbenol and ipsenol.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 18 (1992), S. 1577-1582 
    ISSN: 1573-1561
    Keywords: Coleoptera ; Scolytidae ; Ips latidens ; Ips pini ; interspecific communication ; synomone ; pheromone ; ipsenol ; ipsdienol ; chirality ; enantiospecificity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In south-central British Columbia, the attraction ofIps latidens (LeConte) to its pheromone, ipsenol, was inhibited by (S)−(+)-ipsdienol, a pheromone forI. pini (Say). (R)-(−)−lpsdienol had no effect onI. latidens. (S)−(+)-lpsdienol probably plays a role in interspecific communication between the two species, facilitating reductions in interspecific competition for breeding material and/or interspecific mating interference.
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  • 10
    ISSN: 1573-1561
    Keywords: Ips pini ; Ips integer ; Coleoptera ; Scolytidae ; aggregation pheromone ; lanierone ; ipsdienol ; geographic variation ; synergism ; Enoclerus lecontei ; Cleridae ; kairomone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Lanierone strongly synergized the attraction of male and female Ips pini (Say) to ipsdienol in New York and Wisconsin. Synergy was only weakly significant in Montana and British Columbia and not significant in California. Catches of I. pini in ipsdienol-baited traps were increased 0% ( i.e., nonsignificant) to 9942% by lanierone, with the highest increases in eastern North America. Lanierone had the least effect in California. The effects of lanierone on sex ratios of I. pini in trap catches varied significantly between regions. The addition of lanierone to ipsdienol-baited traps resulted in a general increase in male representation at nine of 12 sites. Ips integer (Eichhoff) was attracted to lanierone alone. Ipsdienol reduced the response of I. integer to lanierone. Enoclerus lecontei (Wolcott) (Cleridae) preferred traps baited with the combination of ipsdienol and lanierone. (R)-(–)-Ipsdienol was attractive to E. sphegeus (F.), Thanasimus undatulus (Say) (Cleridae), and Temnochila chlorodia (Mannerheim) (Trogositidae), while racemic ipsdienol was attractive to E. nigrifrons var. gerhardi Wolc. and Thanasimus dubius (F.). Lanierone had no effect on these species.
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