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Start Over Subject Chrysoperla carnea

1. Action of fenoxycarb on metamorphosis and cocoon spinning in Chrysoperla carnea (Neuroptera: Chrysopidae): identification of the JHA-sensitive period

Creator:
Bortolotti, Laura, Micciarelli Sbrenna, Anna, and Sbrenna, Giovanni
Type:
article, model:article, and TEXT
Subject:
Chrysoperla carnea, juvenoids, fenoxycarb, development, metamorphosis, and JH sensitive period
Language:
English
Description:
Fenoxycarb is an insecticide with a juvenile hormone mimicking effect, which disturbs metamorphosis in several insect species, including the neuropteran Chrysoperla carnea. Administration of different doses of fenoxycarb to third instar larvae causes a dose dependent inhibition of metamorphosis and cocoon spinning. When treated within 48 h of the last larval ecdysis, this insect shows a temporary inhibition of metamorphosis and cocoon spinning, which leads to a prolongation of the third larval instar. When treated after 60 h into the last instar, most of larvae were unable to metamorphose and spin a cocoon. Thus, C. carnea is most sensitive to this juvenoid in the period after 60 h into the last larval instar.
Rights:
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2. Daily visual sensitivity pattern in the green lacewing Chrysoperla carnea (Neuroptera: Chrysopidae)

Creator:
Kral, Karl and Stelzl, Michael
Type:
article, model:article, and TEXT
Subject:
Visual sensitivity, spectral sensitivity, daily rhythm, Neuroptera, lacewings, and Chrysoperla carnea
Language:
English
Description:
24-hour experiments on dark-adapted compound eyes of the green lacewing, Chrysoperla carnea (Stephens) show significant daily changes in absolute sensitivity to stimuli of different colors, but no daily changes in the spectral sensitivity. The absolute sensitivity is highest for all wavelengths at mid night, and lowest at noon. The daily shift of sensitivity is, however, most pronounced in the working range of the eye in the bluegreen-green region of the spectrum. The electrophysiologically measured sensitivity of the compound eye to monochromatic stimuli correlates with the size change of its superposition aperture after illumination with white light. The daily sensitivity pattern is in good agreement with the daily flight activity pattern (see Duelli, 1986).
Rights:
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3. Effects of oviposition-deterring pheromone and allomones on Aphidoletes aphidimyza (Diptera: Cecidomyiidae)

Creator:
Růžička, Zdeněk and Havelka, Jan
Type:
article, model:article, and TEXT
Subject:
Oviposition strategy, deterrent secretion, aphid predators, predaceous gallmidge, Aphidoletes aphidimyza, Cecidomyiidae, Chrysopa oculata, Chrysopa perla, Chrysoperla carnea, Chrysopidae, Coccinella septempunctata, and Coccinellidae
Language:
English
Description:
Larvae of Aphidoletes aphidimyza (Rondani) (Diptera: Cecidomyiidae) secrete an oviposition-deterring pheromone (ODP). In choice tests, females of A. aphidimyza laid significantly fewer eggs on Vicia faba L. plants infested with Aphis fabae Scopoli (Homoptera: Aphidoidea) that were previously exposed to conspecific third-instar larvae or a water extract of their ODP. A. aphidimyza females also laid fewer eggs on aphid-infested plants that were previously exposed to unfed first-instar larvae of Chrysopa oculata Say, Chrysopa perla (L.) or Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae), or second-instar larvae of Coccinella septempunctata L. (Coleoptera: Coccinellidae). However, the response to traces of C. carnea larvae was very weak.
Rights:
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4. Molecular analysis of the gut contents of Harmonia axyridis (Coleoptera: Coccinellidae) as a method for detecting intra-guild predation by this species on aphidophagous predators other than coccinellids

Creator:
Ingels, Brecht, Aebi, Alexandre, Hautier, Louis, Van Leeuwen, Thomas, and De Cercq, Patrick
Type:
article, články, model:article, and TEXT
Subject:
Zoologie, zoologie, entomologie, Coleoptera, Coccinellidae, Harmonia axyridis, Neuroptera, Chrysopidae, Chrysoperla carnea, Diptera, Syrphidae, Episyrphus balteatus, intraguild predation, gut-content analysis, 2, and 59
Language:
English
Description:
Several studies have demonstrated that the invasive ladybird Harmonia axyridis is a strong intra-guild predator of native species of ladybird. Laboratory studies have shown that H. axyridis can be an intra-guild predator of aphid predators other than coccinellids, including the hoverfly Episyrphus balteatus and lacewing Chrysoperla carnea. However, little is known about the effect of intra-guild predation (IGP) by H. axyridis on hoverfly and lacewing populations in the field. In the present study molecular analyses were used to detect the DNA of E. balteatus and C. carnea in the gut contents of H. axyridis. Primers for the syrphid and chrysopid prey were designed and feeding experiments performed to determine how long prey DNA remains detectable in the guts of this ladybird. DNA detection was influenced by the life stage of the predator and species of prey. Meal size did not affect detection time, except when fourth instar individuals of H. axyridis were fed 10 eggs or one second instar of C. carnea. Predator weight, sex and morpho-type (melanic/non-melanic) did not influence DNA detection. The half-life of the time for which the DNA of the prey remained detectable was calculated for each predator-prey combination, and ranged from 8.9 to 52.4 h. This method can be used to study the ecological importance of IGP by H. axyridis on aphidophagous predators other than coccinellids in the field., Brecht Ingels ... [et al.]., and Obsahuje seznam literatury
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public