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  • 1990-1994  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Molecular approach in spider mites (Acari: Tetranychidae): Preliminary data on ribosomal DNA sequences (1992)
    Springer
    Experimental and applied acarology 15 (1992), S. 211-218 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract DNA sequence data were used to examine phylogenetic relationships between six species of economically important Tetranychidae mites:Eotetranychus carpini (Oudemans),E. pruni (Reck),Tetranychus pacificus McGregor,T. mcdanieli McGregor,T. turkestani Ugarov & Nikolski andT. urticae Koch. With primers directed toward conserved elements flanking the target region, the Polymerase Chain Reaction was used to amplify the ITS2 spacer of the ribosomal DNA molecule. The nucleotide sequence of a 300-bp fragment of the ITS2 was determined by direct sequencing and nucleotide divergence used for intra-generic comparison in mites. The resulting phylogenetic tree expressing interspecific relationships in genusTetranychus agrees with morphological data. The study demonstrates the usefulness of the approach in the assessment of the systematics and evolution of the group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01246563
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hypersensitive reaction ofSolanum dulcamara to the gall miteAceria cladophthirus causes an increased susceptibility toTetranychus urticae (1992)
    Springer
    Experimental and applied acarology 15 (1992), S. 15-26 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The hypersensitive reaction induced by the eriophyid miteAceria cladophthirus (Nalepa) on detached leaves ofSolanum dulcamara L. did not protect them against subsequent attacks by the spider miteTetranychus urticae Koch. This reaction stimulated the oviposition ofT. urticae; the increase of fecundity was about 40%. As the survival rate and the life-cycle were not affected, higher populations ofT. urticae developed on leaves previously infested byA. cladophthirus than on healty ones. The hypersensitive reaction caused by members of one family of phytophagous mites induced an increased susceptibility to attacks by mites of an unrelated family.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01193964
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
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