| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
|
Data corrente: |
09/06/2009 |
|
Data da última atualização: |
17/05/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
PINHEIRO, P. V.; QUINTELA, E. D.; OLIVEIRA, J. P. de; SERAPHIN, J. C. |
|
Afiliação: |
PATRICIA VALLE PINHEIRO, CNPAF; ELIANE DIAS QUINTELA, CNPAF; JAISON PEREIRA DE OLIVEIRA, CNPAF; JOSÉ CARLOS SERAPHIN, UFG. |
|
Título: |
Toxicity of neem oil to Bemisia tabaci biotype B nymphs reared on dry bean. |
|
Ano de publicação: |
2009 |
|
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 44, n. 4, p. 354-360, abr. 2009. |
|
DOI: |
https://doi.org/10.1590/S0100-204X2009000400004 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The objective of this work was to determine the most susceptible nymphal stage of Bemisia tabaci biotype B to neem (Azadirachta indica A. Juss.) oil applied to dry bean (Phaseolus vulgaris L.) in a screenhouse. A solution of commercial oil (Dalneem) extracted from neem seeds was sprayed directly on each nymphal instar at 0, 0.1, 0.25, 0.5, 1 and 2% concentrations for lethal concentration (LC) determination, and at 0, 0.5 and 1% concentrations for lethal time (LT) determination. The number of living and dead nymphs was recorded five days after spraying for LC determination, and daily during six days for LT determination. The LC50 estimated for fourth instar nymphs occurred at 0.56% concentration. For all instars, LC50 and LC95 were estimated at 0.32 and 2.78% concentrations, respectively. The estimated values of LT50 at 1% concentration were 2.46, 4.45, 3.02 and 6.98 days for the first to fourth instars, respectively. The LT50 occurred at five days for 0.5% and at four days for 1% concentration in all instars. A mortality rate of over 80% was observed on the 6th day for the first to third instars at 1% concentration. The first three nymphal stages were more susceptible to neem oil when compared to the fourth nymphal stage. |
|
Palavras-Chave: |
Concentração letal; Estágio ninfal; Estágios imaturos; immature stages; lethal concentration; mosca-branca; Nim Dalneem; Óleo de nim; whitefly. |
|
Thesagro: |
Azadirachta Indica; Bemisia Tabaci; Feijão; Mosca Branca; Nim; Phaseolus Vulgaris. |
|
Categoria do assunto: |
--
O Insetos e Entomologia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPAF-2009-09/28664/1/44n04a04.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE-2009-09/45889/1/44n04a04.pdf
|
|
Marc: |
LEADER 02238naa a2200349 a 4500
001 1217226
005 2022-05-17
008 2009 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/S0100-204X2009000400004$2DOI
100 1 $aPINHEIRO, P. V.
245 $aToxicity of neem oil to Bemisia tabaci biotype B nymphs reared on dry bean.
260 $c2009
520 $aThe objective of this work was to determine the most susceptible nymphal stage of Bemisia tabaci biotype B to neem (Azadirachta indica A. Juss.) oil applied to dry bean (Phaseolus vulgaris L.) in a screenhouse. A solution of commercial oil (Dalneem) extracted from neem seeds was sprayed directly on each nymphal instar at 0, 0.1, 0.25, 0.5, 1 and 2% concentrations for lethal concentration (LC) determination, and at 0, 0.5 and 1% concentrations for lethal time (LT) determination. The number of living and dead nymphs was recorded five days after spraying for LC determination, and daily during six days for LT determination. The LC50 estimated for fourth instar nymphs occurred at 0.56% concentration. For all instars, LC50 and LC95 were estimated at 0.32 and 2.78% concentrations, respectively. The estimated values of LT50 at 1% concentration were 2.46, 4.45, 3.02 and 6.98 days for the first to fourth instars, respectively. The LT50 occurred at five days for 0.5% and at four days for 1% concentration in all instars. A mortality rate of over 80% was observed on the 6th day for the first to third instars at 1% concentration. The first three nymphal stages were more susceptible to neem oil when compared to the fourth nymphal stage.
650 $aAzadirachta Indica
650 $aBemisia Tabaci
650 $aFeijão
650 $aMosca Branca
650 $aNim
650 $aPhaseolus Vulgaris
653 $aConcentração letal
653 $aEstágio ninfal
653 $aEstágios imaturos
653 $aimmature stages
653 $alethal concentration
653 $amosca-branca
653 $aNim Dalneem
653 $aÓleo de nim
653 $awhitefly
700 1 $aQUINTELA, E. D.
700 1 $aOLIVEIRA, J. P. de
700 1 $aSERAPHIN, J. C.
773 $tPesquisa Agropecuária Brasileira$gv. 44, n. 4, p. 354-360, abr. 2009.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
26/05/2022 |
|
Data da última atualização: |
26/05/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
OLIVEIRA, L. E. Z. de; NUNES, R. de S.; FIGUEIREDO, C. C. de; REIN, T. A. |
|
Afiliação: |
LUIZ EDUARDO ZANCANARO DE OLIVEIRA; RAFAEL DE SOUZA NUNES, CPAC; CÍCERO CÉLIO DE FIGUEIREDO; THOMAZ ADOLPHO REIN, CPAC. |
|
Título: |
Spatial distribution of soil phosphorus fractions in a clayey Oxisol submitted to long-term phosphate fertilization strategies. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
Geoderma, v. 418, 115847, 2022. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Due to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the P source. Soil organic carbon (SOC) contents were not affected by P placement or source. However, a significant accumulation of SOC was seen from the soil surface downwards after the last eight crops. The spatial distribution of P and SOC was better correlated under broadcast treatments, with high values for both variables at the soil surface; this may explain similar yields to those obtained with band application, where P fertilizer is placed near the main roots in an attempt to reduce P adsorption to the soil solid phase MenosDue to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the ... Mostrar Tudo |
|
Thesagro: |
Fósforo; Plantio Direto; Solo. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02614naa a2200193 a 4500
001 2143493
005 2022-05-26
008 2022 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, L. E. Z. de
245 $aSpatial distribution of soil phosphorus fractions in a clayey Oxisol submitted to long-term phosphate fertilization strategies.$h[electronic resource]
260 $c2022
520 $aDue to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the P source. Soil organic carbon (SOC) contents were not affected by P placement or source. However, a significant accumulation of SOC was seen from the soil surface downwards after the last eight crops. The spatial distribution of P and SOC was better correlated under broadcast treatments, with high values for both variables at the soil surface; this may explain similar yields to those obtained with band application, where P fertilizer is placed near the main roots in an attempt to reduce P adsorption to the soil solid phase
650 $aFósforo
650 $aPlantio Direto
650 $aSolo
700 1 $aNUNES, R. de S.
700 1 $aFIGUEIREDO, C. C. de
700 1 $aREIN, T. A.
773 $tGeoderma$gv. 418, 115847, 2022.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
