NDLI: On the development, feeding activity and prey preference ofHippodamia convergens Guer.-Men. (Col., Coccinellidae) preying onThrips tabaci Lind. (Thys., Thripidae) and two species of Aphidae

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On the occurrence of the robinia-leafminer,Phyllonorycter robiniella (Clem.) and the horse-chestnut- leafminer,Cameraria ohridella Desch. et Dim. (Lep., Gracillariidae) in South Tyrol

Effect of the nematicide carbofuran on the population development of the citrus parasitic nematodeTylenchulus semipenetrans and predacious soil mites in citrus orchard under organic manure regime of fertilization

Results and perspectives in the use ofBacillus thuringiensis Berl. var.kurstaki and other pathogens againstThaumetopoea pityocampa (Den. et Schiff.) in Italy (Lep., Thaumetopoeidae)

On the development, feeding activity and prey preference ofHippodamia convergens Guer.-Men. (Col., Coccinellidae) preying onThrips tabaci Lind. (Thys., Thripidae) and two species of Aphidae

Journal of Pest Science : Volume 71, Issue 3, April 1998

Journal of Pest Science : Volume 71, Issue 2, March 1998

Journal of Pest Science : Volume 71, Issue 1, January 1998

Journal of Pest Science : Volume 70

On the development, feeding activity and prey preference ofHippodamia convergens Guer.-Men. (Col., Coccinellidae) preying onThrips tabaci Lind. (Thys., Thripidae) and two species of Aphidae

Content Provider	Springer Nature Link
Author	Schade, M. Sengonca, C.
Copyright Year	1998
Abstract	Thrips tabaci Lind. is very difficult to control and thus one of the most important pests of leek in Europe. As an alternative to insecticides biological control may be carried out by making use of beneficial insects, the Coccinellidae being one of the most important predatory families. In the present study laboratory trials were carried out withHippodamia convergens Guer.-Men., one of the polyphagous representatives of the lady birds, to figure out the feeding activity, development and prey preference ofH. convergens against the onion thrips in comparison with two aphid species. H. convergens developed fully when fed exclusivelyT. tabaci larvae, although mortality was considerably higher and development took much longer. When fed thrips the complete development lasted 29,8 days on an average, the mortality reaching 88%. When offeredAcyrthosiphon pisum (Harris)H. convergens took only 24 days for development with a mortality of only 16%. Above all, the fourth larval instar and the pupa suffered from a very high mortality, reaching 45 and 50% respectively. WithA. pisum as a prey mortality decreased to only 6%. The duration of the pupal development was not affected by the prey species.The feeding activity ofH. convergens increased significantly during the development. The larvae of the second and fourth instar predated 28 and 170 thrips larvae respectively per day as a maximum. The adults achieved the highest feeding activity, predating more than 300 thrips larvae in 24 hours. When adding up the number of prey individuals per day for each developmental instar, the L2 larvae predated more than 90 and the L4 larvae more than 1000 thrips larvae.When offered thrips larvae andMyzus persicae (Sulz.) simultaneously, there was an increasing prey preference during the development ofH. convergens from first larval instar to adult. As to the last instars there was 20–25% less predation of thrips larvae compared to the aphids during 24 hours.
Starting Page	77
Ending Page	80
Page Count	4
File Format	PDF
ISSN	03407330
Journal	Journal of Pest Science
Volume Number	71
Issue Number	4
e-ISSN	16124766
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Agriculture Plant Pathology Plant Sciences Ecology Forestry
Content Type	Text
Resource Type	Article
Subject	Environmental Science Agricultural and Biological Sciences

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On the development, feeding activity and prey preference ofHippodamia convergens Guer.-Men. (Col., Coccinellidae) preying onThrips tabaci Lind. (Thys., Thripidae) and two species of Aphidae

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