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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
30/11/2000 |
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Data da última atualização: |
09/03/2006 |
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Autoria: |
NUNES, M. C.; CORREA-FERREIRA, B.S. |
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Título: |
Effect of parasitsm by hexacladia smithii on survival and reproductive capacity of Euschistus heros females. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONGRESS OF ENTOMOLOGY, 21., 2000, Foz do Iguassu. Abstracts... Londrina: Embrapa Soja, 2000. |
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Volume: |
v.1 |
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Páginas: |
p.406. |
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Idioma: |
Português |
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Conteúdo: |
Considering the importance of Euschistus heros a soybean pest and the high incidence of the parasitoid Hexacladia smithii on this host, its influence on the survival and reproductive potential was evaluated. These two factors were compared under laboratory conditions (25C+2C, 65%+10% RH, 14L:10D) using healthy and parasitized females at different development stages (1,7 and 14 days of adult life). A strong influence of H. smithii parasitism on the reproductive capacity of E. heros females at the different ages studied was detected. Fecundity was drasticaly reduced when the parasitism occurred at the first day female adult life, when they are reproductively imature. During ca. 46 days, healthy E. heros females deposited an average of 66.92 eggs, (11.31 eggs masses/female), statistically higher than the values obtained for females parasitized by H. smithii at 1,7 and 14 days of adult life, when average values of 1,8.86 and 14.10 eggs per female, respectively. In relation to egg masses size there was significant differences among treatments. Althoug data had shown a tendency for bigger egg masses (5.71 eggs) for healthy females as compared to H. smithii parasitized females (1 to 4.24 eggs/egg mass). E. heros egg fertility was not affected by H. smithii parasitism when this occurred at seven (60.41%) and 14 days of adult life (71.40%) as compared to healthy females (94.22%). Parasitism supressed adult survival after 45 days, compared to 32% survival of unparasitized ones. These results indicate that parasitism by H. snithii affected the reproductive capacity of E. heros in all stages tested being its influence higher when the insect was immature (1 day) reducing the offsprings and causing high mortality to the host. MenosConsidering the importance of Euschistus heros a soybean pest and the high incidence of the parasitoid Hexacladia smithii on this host, its influence on the survival and reproductive potential was evaluated. These two factors were compared under laboratory conditions (25C+2C, 65%+10% RH, 14L:10D) using healthy and parasitized females at different development stages (1,7 and 14 days of adult life). A strong influence of H. smithii parasitism on the reproductive capacity of E. heros females at the different ages studied was detected. Fecundity was drasticaly reduced when the parasitism occurred at the first day female adult life, when they are reproductively imature. During ca. 46 days, healthy E. heros females deposited an average of 66.92 eggs, (11.31 eggs masses/female), statistically higher than the values obtained for females parasitized by H. smithii at 1,7 and 14 days of adult life, when average values of 1,8.86 and 14.10 eggs per female, respectively. In relation to egg masses size there was significant differences among treatments. Althoug data had shown a tendency for bigger egg masses (5.71 eggs) for healthy females as compared to H. smithii parasitized females (1 to 4.24 eggs/egg mass). E. heros egg fertility was not affected by H. smithii parasitism when this occurred at seven (60.41%) and 14 days of adult life (71.40%) as compared to healthy females (94.22%). Parasitism supressed adult survival after 45 days, compared to 32% survival of unparasitized ones. These ... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Inseto praga; Pest insects; Soybean. |
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Thesagro: |
Controle Biológico; Soja. |
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Thesaurus Nal: |
biological control; Brazil; Encyrtidae; fecundity; Pentatomidae. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02570naa a2200289 a 4500
001 1462590
005 2006-03-09
008 2000 bl uuuu u00u1 u #d
100 1 $aNUNES, M. C.
245 $aEffect of parasitsm by hexacladia smithii on survival and reproductive capacity of Euschistus heros females.
260 $c2000
300 $ap.406. v.1
490 $vv.1
520 $aConsidering the importance of Euschistus heros a soybean pest and the high incidence of the parasitoid Hexacladia smithii on this host, its influence on the survival and reproductive potential was evaluated. These two factors were compared under laboratory conditions (25C+2C, 65%+10% RH, 14L:10D) using healthy and parasitized females at different development stages (1,7 and 14 days of adult life). A strong influence of H. smithii parasitism on the reproductive capacity of E. heros females at the different ages studied was detected. Fecundity was drasticaly reduced when the parasitism occurred at the first day female adult life, when they are reproductively imature. During ca. 46 days, healthy E. heros females deposited an average of 66.92 eggs, (11.31 eggs masses/female), statistically higher than the values obtained for females parasitized by H. smithii at 1,7 and 14 days of adult life, when average values of 1,8.86 and 14.10 eggs per female, respectively. In relation to egg masses size there was significant differences among treatments. Althoug data had shown a tendency for bigger egg masses (5.71 eggs) for healthy females as compared to H. smithii parasitized females (1 to 4.24 eggs/egg mass). E. heros egg fertility was not affected by H. smithii parasitism when this occurred at seven (60.41%) and 14 days of adult life (71.40%) as compared to healthy females (94.22%). Parasitism supressed adult survival after 45 days, compared to 32% survival of unparasitized ones. These results indicate that parasitism by H. snithii affected the reproductive capacity of E. heros in all stages tested being its influence higher when the insect was immature (1 day) reducing the offsprings and causing high mortality to the host.
650 $abiological control
650 $aBrazil
650 $aEncyrtidae
650 $afecundity
650 $aPentatomidae
650 $aControle Biológico
650 $aSoja
653 $aBrasil
653 $aInseto praga
653 $aPest insects
653 $aSoybean
700 1 $aCORREA-FERREIRA, B.S.
773 $tIn: INTERNATIONAL CONGRESS OF ENTOMOLOGY, 21., 2000, Foz do Iguassu. Abstracts... Londrina: Embrapa Soja, 2000.
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Embrapa Soja (CNPSO) |
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