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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
05/09/2023 |
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Data da última atualização: |
05/09/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
RESENDE, R. S.; ARAÚJO, E. R. |
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Título: |
Efficacy of bactericides for management of bacterial bulb rot in onion, Brazil, 2021-22. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Plant Disease Management Reports, St. Paul, MN, v. 17, 2023. |
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Idioma: |
Inglês |
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Conteúdo: |
A trial was conducted in 2021-22 at the Epagri Experimental Station (EPAGRI) in Ituporanga, Santa Catarina, Brazil, to evaluate the potential of bactericide products for managing bacterial bulb rot. Plants of onion (SCS373-28, Valessul), at the 3-leaf stage, were transplanted into a field with a previous history of Pantoea ananatis and Burkholderia gladioli pv. alliicola. Twelve treatments and a nontreated control were arranged in a randomized block design with four replications. Plots were 3 m wide (with 33 cm between rows) by 2.75 m long (with 10 cm between plants), providing 243 plants per plot. Treatments were applied eight times at 7-day intervals, starting at the bulb initiation stage, which occurred approximately 75 days after transplantation. Treatments were applied using a CO2-pressurized backpack sprayer at a volume equivalent to 500 L/ha. The harvesting was carried out 120 days after transplanting. Subsequently, approximately 175 bulbs from the central rows of each plot were field-cured for about 10 days, topped, size-graded, weighed, and inspected for bulb rot. The incidence of the disease was determined by cutting all soft bulbs longitudinally and calculating the percentage of bulbs with any visible rot relative to the total number of bulbs. The asymptomatic bulbs were stored in plastic boxes for 100 and 180 days, followed by longitudinal cutting and inspection for bacterial rot. Marketable bulbs were considered those with a diameter of≥ 35 mm. The effect of treatments was analysed using analysis of variance (ANOVA). Means for each variable were separated using the Tukey?s pairwise procedure. Despite eight applications of treatments, there was no significant reduction in the incidence of bulb rot at harvest, after storage for 100 and 180 days, or in marketable yield when compared to the non-treated control plots. No phytotoxicity was observed because of treatment applications. MenosA trial was conducted in 2021-22 at the Epagri Experimental Station (EPAGRI) in Ituporanga, Santa Catarina, Brazil, to evaluate the potential of bactericide products for managing bacterial bulb rot. Plants of onion (SCS373-28, Valessul), at the 3-leaf stage, were transplanted into a field with a previous history of Pantoea ananatis and Burkholderia gladioli pv. alliicola. Twelve treatments and a nontreated control were arranged in a randomized block design with four replications. Plots were 3 m wide (with 33 cm between rows) by 2.75 m long (with 10 cm between plants), providing 243 plants per plot. Treatments were applied eight times at 7-day intervals, starting at the bulb initiation stage, which occurred approximately 75 days after transplantation. Treatments were applied using a CO2-pressurized backpack sprayer at a volume equivalent to 500 L/ha. The harvesting was carried out 120 days after transplanting. Subsequently, approximately 175 bulbs from the central rows of each plot were field-cured for about 10 days, topped, size-graded, weighed, and inspected for bulb rot. The incidence of the disease was determined by cutting all soft bulbs longitudinally and calculating the percentage of bulbs with any visible rot relative to the total number of bulbs. The asymptomatic bulbs were stored in plastic boxes for 100 and 180 days, followed by longitudinal cutting and inspection for bacterial rot. Marketable bulbs were considered those with a diameter of≥ 35 mm. The effect ... Mostrar Tudo |
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Thesagro: |
Allium cepa; Burkholderia gladioli pv alliicola; onion; Pantoea ananatis. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02489naa a2200181 a 4500
001 1133606
005 2023-09-05
008 2023 bl uuuu u00u1 u #d
100 1 $aRESENDE, R. S.
245 $aEfficacy of bactericides for management of bacterial bulb rot in onion, Brazil, 2021-22.$h[electronic resource]
260 $c2023
520 $aA trial was conducted in 2021-22 at the Epagri Experimental Station (EPAGRI) in Ituporanga, Santa Catarina, Brazil, to evaluate the potential of bactericide products for managing bacterial bulb rot. Plants of onion (SCS373-28, Valessul), at the 3-leaf stage, were transplanted into a field with a previous history of Pantoea ananatis and Burkholderia gladioli pv. alliicola. Twelve treatments and a nontreated control were arranged in a randomized block design with four replications. Plots were 3 m wide (with 33 cm between rows) by 2.75 m long (with 10 cm between plants), providing 243 plants per plot. Treatments were applied eight times at 7-day intervals, starting at the bulb initiation stage, which occurred approximately 75 days after transplantation. Treatments were applied using a CO2-pressurized backpack sprayer at a volume equivalent to 500 L/ha. The harvesting was carried out 120 days after transplanting. Subsequently, approximately 175 bulbs from the central rows of each plot were field-cured for about 10 days, topped, size-graded, weighed, and inspected for bulb rot. The incidence of the disease was determined by cutting all soft bulbs longitudinally and calculating the percentage of bulbs with any visible rot relative to the total number of bulbs. The asymptomatic bulbs were stored in plastic boxes for 100 and 180 days, followed by longitudinal cutting and inspection for bacterial rot. Marketable bulbs were considered those with a diameter of≥ 35 mm. The effect of treatments was analysed using analysis of variance (ANOVA). Means for each variable were separated using the Tukey?s pairwise procedure. Despite eight applications of treatments, there was no significant reduction in the incidence of bulb rot at harvest, after storage for 100 and 180 days, or in marketable yield when compared to the non-treated control plots. No phytotoxicity was observed because of treatment applications.
650 $aAllium cepa
650 $aBurkholderia gladioli pv alliicola
650 $aonion
650 $aPantoea ananatis
700 1 $aARAÚJO, E. R.
773 $tPlant Disease Management Reports, St. Paul, MN$gv. 17, 2023.
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Registro original: |
Epagri-Sede (Epagri-Sede) |
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Biblioteca |
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Origem |
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Registro |
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Registro Completo
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
21/11/2019 |
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Data da última atualização: |
21/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
CASTILHOS, R. V.; GRÜTZMACHER, A. D.; KRÜGER, L. R.; SIQUEIRA, P. R. B.; MORAES, Í. L. |
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Título: |
Persistence of insecticides used in peach orchards to larvae and adults of the predator Chrysoperla externa (Neuroptera: Chrysopidae). |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Arquivos do Instituto Biológico, São Paulo, v. 86, p. e0312018, 2019. |
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Idioma: |
Inglês |
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Conteúdo: |
This work aimed to evaluate the persistence (duration of harmful activity) of five insecticides used for pest control in peach orchards, on larvae and adults of the predator Chrysoperla externa. The insecticides were sprayed on cv. Bordô vine plants using the maximum dosage recommended for peach orchards. Weekly, at 3, 10, 17, 24 and 31 days after spraying, larvae and adults of the predator were exposed to treated leaves in order to assess the residual effect of insecticides on mortality and possible effects on reproduction. Given the toxicity observed along the weekly bioassays, the insecticides were classified into persistence categories established by the International Organization for Biological and Integrated Control of Noxious Animals and Plants (IOBC). High persistence was obtained for the organophosphorus insecticides (% of active ingredient) phosmet (0.100) and malathion (0.200), and both were considered persistent (> 30 days of harmful activity) to larvae and adults of C. externa. Similarly, the benzoylurea insecticide lufenuron (0.005), which acts exclusively on immature stages of insects, was persistent to larvae. Differences concerning the persistence for both development stages evaluated were observed for the pyrethroid insecticide deltamethrin (0.001), that was persistent to larvae but moderately persistent (16 ? 30 days of harmful activity) to adults; and for the organophosphate fenthion (0.050) which was considered moderately persistent to larvae and short-lived (< 5 days of harmful activity) to adults of C. externa. MenosThis work aimed to evaluate the persistence (duration of harmful activity) of five insecticides used for pest control in peach orchards, on larvae and adults of the predator Chrysoperla externa. The insecticides were sprayed on cv. Bordô vine plants using the maximum dosage recommended for peach orchards. Weekly, at 3, 10, 17, 24 and 31 days after spraying, larvae and adults of the predator were exposed to treated leaves in order to assess the residual effect of insecticides on mortality and possible effects on reproduction. Given the toxicity observed along the weekly bioassays, the insecticides were classified into persistence categories established by the International Organization for Biological and Integrated Control of Noxious Animals and Plants (IOBC). High persistence was obtained for the organophosphorus insecticides (% of active ingredient) phosmet (0.100) and malathion (0.200), and both were considered persistent (> 30 days of harmful activity) to larvae and adults of C. externa. Similarly, the benzoylurea insecticide lufenuron (0.005), which acts exclusively on immature stages of insects, was persistent to larvae. Differences concerning the persistence for both development stages evaluated were observed for the pyrethroid insecticide deltamethrin (0.001), that was persistent to larvae but moderately persistent (16 ? 30 days of harmful activity) to adults; and for the organophosphate fenthion (0.050) which was considered moderately persistent to larvae and short-l... Mostrar Tudo |
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Palavras-Chave: |
biological control; chemical control; green lacewing; integrated pest management; Prunus persica. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02325naa a2200229 a 4500
001 1129138
005 2019-11-21
008 2019 bl uuuu u00u1 u #d
100 1 $aCASTILHOS, R. V.
245 $aPersistence of insecticides used in peach orchards to larvae and adults of the predator Chrysoperla externa (Neuroptera$bChrysopidae).$h[electronic resource]
260 $c2019
520 $aThis work aimed to evaluate the persistence (duration of harmful activity) of five insecticides used for pest control in peach orchards, on larvae and adults of the predator Chrysoperla externa. The insecticides were sprayed on cv. Bordô vine plants using the maximum dosage recommended for peach orchards. Weekly, at 3, 10, 17, 24 and 31 days after spraying, larvae and adults of the predator were exposed to treated leaves in order to assess the residual effect of insecticides on mortality and possible effects on reproduction. Given the toxicity observed along the weekly bioassays, the insecticides were classified into persistence categories established by the International Organization for Biological and Integrated Control of Noxious Animals and Plants (IOBC). High persistence was obtained for the organophosphorus insecticides (% of active ingredient) phosmet (0.100) and malathion (0.200), and both were considered persistent (> 30 days of harmful activity) to larvae and adults of C. externa. Similarly, the benzoylurea insecticide lufenuron (0.005), which acts exclusively on immature stages of insects, was persistent to larvae. Differences concerning the persistence for both development stages evaluated were observed for the pyrethroid insecticide deltamethrin (0.001), that was persistent to larvae but moderately persistent (16 ? 30 days of harmful activity) to adults; and for the organophosphate fenthion (0.050) which was considered moderately persistent to larvae and short-lived (< 5 days of harmful activity) to adults of C. externa.
653 $abiological control
653 $achemical control
653 $agreen lacewing
653 $aintegrated pest management
653 $aPrunus persica
700 1 $aGRÜTZMACHER, A. D.
700 1 $aKRÜGER, L. R.
700 1 $aSIQUEIRA, P. R. B.
700 1 $aMORAES, Í. L.
773 $tArquivos do Instituto Biológico, São Paulo$gv. 86, p. e0312018, 2019.
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Epagri-Sede (Epagri-Sede) |
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