Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 109753
Title Transmission dynamics of the multicapsid nucleopolyhedrovirus SeMNPV in Spodoptera exigua populations in greenhouse chrysanthemum
Author(s) Bianchi, F.J.J.A.; Essen, P.H.A. van; Werf, W. van der; Smits, P.H.
Source Proceedings of the Section Experimental and Applied Entomology of the Netherlands Entomological Society 12 (2001). - ISSN 1388-8390 - p. 91 - 96.
Department(s) Crop and Weed Ecology
Laboratory of Virology
PE&RC
Publication type Non-refereed article in scientific journal
Publication year 2001
Abstract The multicapsid nucleopolyhedrovirus, SeMNPV, is naturally maintained in Spodoptera exigua populations by vertical transmission from females to eggs and by horizontal transmission from cadavers of caterpillars to other caterpillars. Laboratory and greenhouse experiments were conducted to quantify transmission rates and provide baseline data to assess the potential of this virus to maintain itself naturally in pest populations after application in biocontrol programs. As to vertical transmission, 18% of the first instar larvae originating from egg batches produced by infected moths contracted SeMNPV, while 34% of the egg batches gave rise to one or more infected first instar larvae. As only few large egg batches were virus-free, 70% of all uninfescted larvae hatched in egg batches that contained one or more infected larvae. Substantial horizontal transmisson was observed under greenhouse conditions. Presence of 0, 1 or 10 infected first instar larvae in a batch of 100 first instar larvae resulted in survival to the fifth instar of 41, 30 and 20%, respectively. However, the effect on crop injury was marginal. The observed high transmission rates favour the maintenance of SeMNPV in S. exigua populations in greenhouses.
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