Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil

Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil

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The objective of this work was to identify parasitoids of Diamondback Moth in the Federal District. Larvae of the insect were collected in areas treated with insecticides or in untreated areas. Four species of parasitoids were identified: Apanteles sp. (Braconidae), Oomyzus sokolowiskii (Kurdjumov) (Eulophidae), Diadegma sp. (Ichneumonidae) and Actia sp. (Tachnidae). The total rate of parasitism ranged from 5% to 94% in fields untreated with insecticides, while they ranged between 11% to 87% in treated ones. Most Diamondback Moth larvae were found on cabbage head and on the underside of outer cabbage leaves. The larvae distribution could allow them to escape insecticide residues and so also allow parasitoid survival.

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Main Authors: Branco, Marina Castelo, Medeiros, Maria Alice
Format: Digital revista
Language:por
Published: Pesquisa Agropecuaria Brasileira 2001
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/6100
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spelling rev-pab-br-article-61002014-09-16T17:52:24Z Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil Impacto de inseticidas sobre parasitóides da traça-das-crucíferas em repolho, no Distrito Federal Branco, Marina Castelo Medeiros, Maria Alice Plutella xylostella; Brassica oleraceae; parasitism; natural enemies Plutella xylostella; Brassica oleraceae; parasitismo; inimigos naturais The objective of this work was to identify parasitoids of Diamondback Moth in the Federal District. Larvae of the insect were collected in areas treated with insecticides or in untreated areas. Four species of parasitoids were identified: Apanteles sp. (Braconidae), Oomyzus sokolowiskii (Kurdjumov) (Eulophidae), Diadegma sp. (Ichneumonidae) and Actia sp. (Tachnidae). The total rate of parasitism ranged from 5% to 94% in fields untreated with insecticides, while they ranged between 11% to 87% in treated ones. Most Diamondback Moth larvae were found on cabbage head and on the underside of outer cabbage leaves. The larvae distribution could allow them to escape insecticide residues and so also allow parasitoid survival. Este trabalho teve como objetivo identificar os parasitóides da Plutella xylostella (L.) presentes em áreas de cultivo do Distrito Federal, tratadas ou não com inseticidas, onde larvas do inseto foram coletadas. Foram identificados quatro parasitóides: Apanteles sp. (Braconidae), Oomyzus sokolowiskii (Kurdjumov) (Eulophidae), Diadegma sp. (Ichneumonidae) e Actia sp. (Tachinidae). O nível de parasitismo nas áreas não tratadas com inseticidas variou de 5% a 94%, enquanto em áreas tratadas variou de 11% a 87%. A maior parte das larvas de traça-das-crucíferas foram encontradas nas cabeças de repolho ou na parte inferior das folhas da saia das plantas. Esta distribuição de larvas sobre as plantas deve permitir que estas escapem do contato com o inseticida, e, conseqüentemente, os parasitóides podem sobreviver nas plantas tratadas. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2001-01-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/6100 Pesquisa Agropecuaria Brasileira; v.36, n.1, jan. 2001; 7-13 Pesquisa Agropecuária Brasileira; v.36, n.1, jan. 2001; 7-13 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/6100/3167
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language por
format Digital
author Branco, Marina Castelo
Medeiros, Maria Alice
spellingShingle Branco, Marina Castelo
Medeiros, Maria Alice
Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil
author_facet Branco, Marina Castelo
Medeiros, Maria Alice
author_sort Branco, Marina Castelo
title Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil
title_short Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil
title_full Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil
title_fullStr Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil
title_full_unstemmed Impact of insecticides on diamondback moth parasitoids on cabbage in the Federal District of Brazil
title_sort impact of insecticides on diamondback moth parasitoids on cabbage in the federal district of brazil
description The objective of this work was to identify parasitoids of Diamondback Moth in the Federal District. Larvae of the insect were collected in areas treated with insecticides or in untreated areas. Four species of parasitoids were identified: Apanteles sp. (Braconidae), Oomyzus sokolowiskii (Kurdjumov) (Eulophidae), Diadegma sp. (Ichneumonidae) and Actia sp. (Tachnidae). The total rate of parasitism ranged from 5% to 94% in fields untreated with insecticides, while they ranged between 11% to 87% in treated ones. Most Diamondback Moth larvae were found on cabbage head and on the underside of outer cabbage leaves. The larvae distribution could allow them to escape insecticide residues and so also allow parasitoid survival.
publisher Pesquisa Agropecuaria Brasileira
publishDate 2001
url https://seer.sct.embrapa.br/index.php/pab/article/view/6100
work_keys_str_mv AT brancomarinacastelo impactofinsecticidesondiamondbackmothparasitoidsoncabbageinthefederaldistrictofbrazil
AT medeirosmariaalice impactofinsecticidesondiamondbackmothparasitoidsoncabbageinthefederaldistrictofbrazil
AT brancomarinacastelo impactodeinseticidassobreparasitoidesdatracadascruciferasemrepolhonodistritofederal
AT medeirosmariaalice impactodeinseticidassobreparasitoidesdatracadascruciferasemrepolhonodistritofederal
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