| Trichogramma pretiosum parasitism and dispersal capacity: a basis for developing biological control programs for soybean caterpillars. | |
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MedLine Citation:
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PMID: 21672293 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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In order to succeed in biological control programs, not only is it crucial to understand the number of natural enemies to be released but also on how many sites per area this releasing must be performed. These variables might differ deeply among egg parasitoid species and crops worked. Therefore, these trials were carried out to evaluate the parasitism (%) in eggs of Anticarsia gemmatalis and Pseudoplusia includens after the release of different densities of the egg parasitoid Trichogramma pretiosum. Field dispersal was also studied, in order to determine appropriate recommendations for the release of this parasitoid in soybean fields. The regression analysis between parasitism (%) and densities of the parasitoid indicated a quadratic effect for both A. gemmatalis and P. includens. The maximum parasitism within 24 h after the release was reached with densities of 25.6 and 51.2 parasitoids per host egg, respectively, for the two pests. Parasitism of T. pretiosum in eggs of P. includens decreased linearly as the distance of the pest eggs from the parasitoid release sites increased. For P. includens, the mean radius of T. pretiosum action and the area of parasitoid dispersal in the soybean crop were 8.01 m and 85.18 m2, respectively. We conclude that for a successful biological control program of lepidopteran pests using T. pretiosum in soybean fields, a density of 25.6 parasitoids per host egg, divided into 117 sites per hectare, should be used. |
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Authors:
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R C O de Freitas Bueno; J R P Parra; A de Freitas Bueno |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-6-15 |
Journal Detail:
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Title: Bulletin of entomological research Volume: - ISSN: 1475-2670 ISO Abbreviation: - Publication Date: 2011 Jun |
Date Detail:
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Created Date: 2011-6-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2984715R Medline TA: Bull Entomol Res Country: - |
Other Details:
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Languages: ENG Pagination: 1-8 Citation Subset: - |
Affiliation:
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Universidade de Rio Verde, FESURV, Fazenda Fontes do Saber, Caixa Postal 104. Rio Verde, Goiás, 75901-970, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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