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The natural enemies of San Jose scale Quadraspidiotus perniciosus Comstock from the order Hymenoptera in the Czech Republic Prirozeni nepratele stitenky zhoubne Quadraspidiotus perniciosus Comstock z radu blanokridlych Hymenoptera v Ceske Republice


The natural enemies of San Jose scale Quadraspidiotus perniciosus Comstock from the order Hymenoptera in the Czech Republic Prirozeni nepratele stitenky zhoubne Quadraspidiotus perniciosus Comstock z radu blanokridlych Hymenoptera v Ceske Republice



Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 503: 41-54



ISSN/ISBN: 1211-8516

During the years 1998-2001were identified 8 species of parasitoids of San Jose scale (Quadraspidiotus perniciosus Comstock). Dominant species were Aphytisproclia Walker with 67,37 % and Prospaltella perniciosi Tower with 30,47 %, which have not been introduced in the Czech Republic. Probably this parasitic wasp spread out into our area from Slovakia which was introduced in the 1950th. Others parasitoids (2,16 %) were Aphytis mytilaspidis Le Baron, Parvulmus aurantii Mercet, Thysanus ater Walker, Azotus celsus Walker, Pteroptrix dimidiata Westwood, Physcus testaceus Masi and 6 species from family Encyrtidae. A sample from Hungary contained these species: Aphytis proclia Walker (52,11%), Prospaltellaperniciosi Tower (23,94 %), Thysanus ater Walker (13,15 %), Ufens foersteri Kryger (5,16 %) and 5,64 % Aphytis mytilaspidis Le Baron, Aspidiotiphagus citrinus Craw, Hispaniella lauri Mercet and Coccophygoides similis Masi. Last 3 species are not on San Jose scale in the Czech republic but these species are inappropriate for introduction because they cannot survive our winter. We introduced Aphytis proclia Walker in an apple orchard. The number of A. proclia on the labeled trees increased in 48,6 % in comparison with control trees. A period of development cycle of populations San Jose scale from the Czech republic last 47 days under laboratory conditions ( plus or minus 25 deg. C, 40-50 % humidity). On the other side the population from Uzbekistan (which we brought from Hungary-Budapest) is needs only 39 days to develop under the same laboratory conditions. The population of San Jose scale has 2,56 generation a year in the apple orchards of the south Moravia. We analysed natural enemies on others scales (Epidiaspis leperii Signoret, Quadraspidiotus piri Lichtenstein, Chionaspis salicis Linne and Lepidosaphes ulmi Linnaeus) from the few samples. Dominant species of all the samples was Aphytis proclia Walker. There were also a few individuals Aphytis mytilaspidis Le Baron and some individuals from family Encyrtidae.

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Accession: 038787880

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