ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Susceptibility of larvae of the mushroom fly Megaselia halterata to the entomopathogenic nematode Steinernema feltiae in bioassays (1998)
    Springer
    BioControl 43 (1998), S. 201-214 
    Details
    ISSN: 1573-8248
    Keywords: biocontrol ; Heterorhabditis ; Lycoriella auripila ; phorids ; sciarids ; sex ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Bioassays were initially conducted in Petri-dishes to screen the efficacy of four Heterorhabiditis and Steinernema species against the mushroom phorid Megaselia halterata. Control rates of 61 to 70% control were obtained at a dosage of 1500 infective juveniles (IJs) per 30 larvae. In order to avoid stress-induced susceptibility, an improved bioassay system in micro-wells, filled with 0.6 ml of compost agar and 0.2 of compost colonized by Agaricus bisporus, was developed. In a screening of different species of Heterorhabiditis and Steinernema with applications of 30 IJs per phorid larva, a highest parasitization rate of 20% was obtained with S. feltiae. Bioassays were continued with S. feltiae in dosage-mortality assays in which larvae of the sciarid Lycoriella auripila and the phorid M. halterata were challenged. At the lowest dosage of 30 IJs per sciarid larva, 78% control was obtained. Increasing the dosage from 30 to 1000 led to only small increases of the phorid mortality. At 1000 IJs per larva a significant mortality of 18% was obtained. The nature of the substrate, compost or casing did not greatly influence the parasitization rates. The sex ratio of nematodes that were able to penetrate and establish in the phorid larvae appeared to be female-skewed. Males were only present at a mean of 19%. Low susceptibility of the phorid larva was ascribed to the inaccessibility of its small mouth opening.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009954401065
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Substrate dependent larval development and emergence of the mushroom pests Lycoriella auripila and Megaselia halterata (1996)
    Springer
    Entomologia experimentalis et applicata 79 (1996), S. 329-334 
    Details
    ISSN: 1570-7458
    Keywords: sciarids ; phorids ; mushroom compost ; casing soil ; Agaricus bisporus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pasteurized, spawned, full-grown and immediately-cased full-grown compost were simultaneously exposed to natural populations of the mushroom pests Lycoriella auripila (Winnertz) (Diptera: Sciaridae) and Megaselia halterata (Wood) (Diptera: Phoridae). Different numbers of adults emerged from each of these composts. Highest numbers of L. auripila emerged from spawned and pasteurized compost whereas lowest numbers of L. auripila emerged from full-grown compost. the emergence from full-grown compost was delayed, which could be explained by the delayed development of the larvae in this type of compost. High numbers of M. halterata emerged from compost that was completely colonized by the mycelia of the edible white button mushroom Agaricus bisporus (Lange) Imbach. The immediate covering of the compost with a casing layer significantly lowered the numbers of emerging M. halterata flies. Compared with the emergence pattern from full-grown and immediately-cased full-grown compost, adult M. halterata showed a delayed pattern of emergence in spawned compost. Adult M. halterata did not emerge from pasteurized compost. The results of these experiments enabled us to improve the timing of the application of insect pathogenic nematodes in the control of the larvae of both insect pests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186291
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Location of immature stages of the mushroom insect pest Megaselia halterata in mushroom-growing medium (1997)
    Springer
    Entomologia experimentalis et applicata 83 (1997), S. 323-327 
    Details
    ISSN: 1570-7458
    Keywords: Agaricus bisporus ; sciarid flies ; Lycoriella auripila ; phorid flies ; Megaselia halterata ; biological control ; insect pathogenic nematodes ; Steinernema feltiae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Experiments were conducted to examine the location of oviposition by the phorid fly Megaselia halterata (Wood) (Diptera: Phoridae) in uncased and cased compost. Clearly, a majority of the gravid females choose oviposition sites directly after entering the top layer of the compost. In uncased compost, 60% of all adults emerged from the top of four compost layers of equal thickness. When the compost was covered by a casing layer which was still uncolonized by Agaricus bisporus, oviposition was further concentrated in the top compost layer. In this situation, 91% of all adults emerged from the top compost layer whereas only 1.5% emerged from the casing. When the casing layer was colonized by mushroom mycelium, 45% of all adults emerged from the casing layer and 53% emerged from the top compost layer. Further concentration in the top compost layer and the casing layer occurred as a result of upward migration of larvae. When compost was cased after oviposition, up to 43% of all adults emerged from the casing layer. We concluded that in the control of phorid infestations with insect pathogenic nematodes, applications in uncased compost can be restricted to the upper compost layer. When compost and casing are filled simultaneously, nematode applications in the casing layer only could be considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002998916843
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...