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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria Tropical. |
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Data corrente: |
03/09/1993 |
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Data da última atualização: |
03/09/1993 |
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Autoria: |
SMITH, J. G. |
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Título: |
Some effects of crop background on populations of aphids and their natural enemies on brussels sprouts. |
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Ano de publicação: |
1969 |
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Fonte/Imprenta: |
Annals of Applied Biologists, v.63, p.326-330, 1969. |
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Idioma: |
Inglês |
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Conteúdo: |
The work described is part of a programme aimed at elucidating biological factors that might be important in controlling pests of brassicas, especially brussels sprouts, and might therefore contribute to integrated control. These experiments were to assess the effect of variation in the crop background, caused by the absence or presence of weeds. The `background' to the crop is considered as the immediate surroundings of the crop plants, within the crop itself. Two different backgrounds were obtained by either clean weeding, to give an area of bare soil between the sprouts, or allowing the naturally occurring weeds to grow in a controlled manner. These weeds were cut back regularly to about 6 in. in height, to form a low-growig `carpet' beneath the sprout plants and so minimize competition between the crop and the weeds. Counts of aphid and of all stages of natural enemies on both sets of sprout plants and on the most common weeds were made at regular intervals. These weeds were fat hen (Chenopodium album L.), spurrey (Spergula arvensis L.) Polygonum persicaria L. and white and yellow charlock (Raphanus raphanistrum L. and Sinapis arvensis L.). Relative numbers of aphids and natural enemies were also assessed from catches of alatae and adult predators in yellow water traps. The only important aphid on the sprout plants was the cabbage aphid, Brevicoryne brassicae L.; aphids on the weeds consisted mainly of the black bean aphid (Aphis fabae Scop.) on C. album. Special attention was given to these species and ... MenosThe work described is part of a programme aimed at elucidating biological factors that might be important in controlling pests of brassicas, especially brussels sprouts, and might therefore contribute to integrated control. These experiments were to assess the effect of variation in the crop background, caused by the absence or presence of weeds. The `background' to the crop is considered as the immediate surroundings of the crop plants, within the crop itself. Two different backgrounds were obtained by either clean weeding, to give an area of bare soil between the sprouts, or allowing the naturally occurring weeds to grow in a controlled manner. These weeds were cut back regularly to about 6 in. in height, to form a low-growig `carpet' beneath the sprout plants and so minimize competition between the crop and the weeds. Counts of aphid and of all stages of natural enemies on both sets of sprout plants and on the most common weeds were made at regular intervals. These weeds were fat hen (Chenopodium album L.), spurrey (Spergula arvensis L.) Polygonum persicaria L. and white and yellow charlock (Raphanus raphanistrum L. and Sinapis arvensis L.). Relative numbers of aphids and natural enemies were also assessed from catches of alatae and adult predators in yellow water traps. The only important aphid on the sprout plants was the cabbage aphid, Brevicoryne brassicae L.; aphids on the weeds consisted mainly of the black bean aphid (Aphis fabae Scop.) on C. album. Special attenti... Mostrar Tudo |
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Palavras-Chave: |
Afideos; Diversidade; Inimigos naturais; Insetos - controle; Pragas - controle. |
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Thesagro: |
Ecologia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02094naa a2200193 a 4500
001 1417759
005 1993-09-03
008 1969 bl --- 0-- u #d
100 1 $aSMITH, J. G.
245 $aSome effects of crop background on populations of aphids and their natural enemies on brussels sprouts.
260 $c1969
520 $aThe work described is part of a programme aimed at elucidating biological factors that might be important in controlling pests of brassicas, especially brussels sprouts, and might therefore contribute to integrated control. These experiments were to assess the effect of variation in the crop background, caused by the absence or presence of weeds. The `background' to the crop is considered as the immediate surroundings of the crop plants, within the crop itself. Two different backgrounds were obtained by either clean weeding, to give an area of bare soil between the sprouts, or allowing the naturally occurring weeds to grow in a controlled manner. These weeds were cut back regularly to about 6 in. in height, to form a low-growig `carpet' beneath the sprout plants and so minimize competition between the crop and the weeds. Counts of aphid and of all stages of natural enemies on both sets of sprout plants and on the most common weeds were made at regular intervals. These weeds were fat hen (Chenopodium album L.), spurrey (Spergula arvensis L.) Polygonum persicaria L. and white and yellow charlock (Raphanus raphanistrum L. and Sinapis arvensis L.). Relative numbers of aphids and natural enemies were also assessed from catches of alatae and adult predators in yellow water traps. The only important aphid on the sprout plants was the cabbage aphid, Brevicoryne brassicae L.; aphids on the weeds consisted mainly of the black bean aphid (Aphis fabae Scop.) on C. album. Special attention was given to these species and ...
650 $aEcologia
653 $aAfideos
653 $aDiversidade
653 $aInimigos naturais
653 $aInsetos - controle
653 $aPragas - controle
773 $tAnnals of Applied Biologists$gv.63, p.326-330, 1969.
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Registro original: |
Embrapa Agroindústria Tropical (CNPAT) |
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| Registros recuperados : 8 | |
| 1. |  | PANIZZI, A. R.; SMITH, J. G. Biology of Piezodorus guildinii: oviposition, development time, adult sex ratio, and longevity. Annals of the Entomological Society of America, Lanham, v. 70, n. 1, p. 35-39, 1977.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - B |
| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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