Chemical control of morning glory as a function of water restriction levels

Giancotti, Paulo Roberto Fidelis; Toledo, Roberto; Alves, Paulo Roberto Arruda; Filho, Ricardo Victória; Cason, João Batista; Rocha, Marta Gomes da

doi:10.1590/s0100-83582014000200012

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…Essa informação foi anteriormente disponibilizada em trabalho realizado com canade-açúcar, onde se verificou controle total de Ipomoea sp. com a mistura (Giancotti et al, 2014).…”

Section: Resultsunclassified

Controle químico de Talinum paniculatum em três estádios de desenvolvimento

et al. 2014

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Resumo -Talinum paniculatum é uma espécie pertencente à família Portulacacea, conhecida popularmente como maria-gorda, planta daninha em culturas como a cana-de-açúcar, feijão comum, soja, milho e cenoura, além de áreas não agrícolas. Com este trabalho objetivou-se estudar a eficácia de herbicidas no controle de T. paniculatum, assim como seu efeito na massa fresca e seca destas plantas em três estádios de desenvolvimento. O delineamento experimental utilizado foi o inteiramente casualizado, com nove tratamentos e quatro repetições, posicionados em três estádios: 4-6 folhas, 10-12 folhas e florescimento. Para avaliar a eficácia dos tratamentos aferiu-se a porcentagem de controle das plantas, além de sua massa fresca e seca. Houve maior controle para alguns tratamentos dentro das fases de desenvolvimento das plantas daninhas, com aplicação de isoxaflutole, diuron+hexazinone, ametryn e imazapic no primeiro estádio, glyphosate na dose de 2000 g e.a. ha -1 , diuron+hexazinone e 2,4-D no segundo estádio e 2,4-D, glyphosate na dose de 2000 g e.a. ha -1 e amônio-glufosinato no terceiro estádio. A massa fresca e seca das plantas daninhas foi afetada, seguindo o comportamento obtido para o controle. O uso de herbicidas se mostrou eficiente na minoria dos arranjos testados para o controle de T. paniculatum. O estádio de desenvolvimento da planta influencia a eficácia de controle dos tratamentos. Palavras-chaves: estádio fenológico, Portulacaceae, herbicidas Abstract -Talinum paniculatum is a species of the Portulacacea family, popularly known as "maria-gorda", weed in crops such as sugarcane, common bean, soybean, corn and carrot, as well as in non-agricultural areas. This work aimed to study the efficacy of herbicides in the control of 1 Recebido para publicação em 11/02/2015 e aceito em 09/07/2015.

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“…Essa informação foi anteriormente disponibilizada em trabalho realizado com canade-açúcar, onde se verificou controle total de Ipomoea sp. com a mistura (Giancotti et al, 2014).…”

Section: Resultsunclassified

Controle químico de Talinum paniculatum em três estádios de desenvolvimento

et al. 2014

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“…commonly infest agricultural areas in Brazil (Kuva et al 2007, Ferreira et al 2011, Giancotti et al 2014, providing indirectly interference on the crop productivity by machinery blocking during mechanical harvesting, in addition to the direct interference on crops by competition for environmental resources (Carvalho et al 2009, Carvalho et al 2014. Among several morning-glory species, Ipomoea hederifolia and Ipomoea quamoclit have been two of the major weeds occurring in sugar cane, soybean, maize, and other crops (Agostineto et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Spray temperature and spray volume influence on the efficacy of carfentrazone-ethyl and saflufenacil to control morning-glory

Agostineto¹,

Ansolin²,

Carvalho³

2015

Commun. Plant Sci.

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The objective of this research was to relate the response of Ipomoea hederifolia and Ipomoea quamoclit with the variation of spray temperature and spray volume of carfentrazone-ethyl and saflufenacil. Two pot-experiments were carried out to relate the spray temperatures (10, 20, and 30 o C) and spray volumes (150, 200, and 250 L ha -1 ) with the plant dry mass accumulation after application of 2 mL ha -1 and 0.5 g ha -1 of the labeled herbicide with carfentrazone-ethyl (Aurora®) and saflufenacil (Heat®). Fourteen days after application, shoot dry mass was determined. Data were expressed in relation to the herbicide-free check and submitted to linear regression analysis. Increasing 10 L ha -1 in spray volume reduces 1.34% of the dry mass of both species, by using carfentrazone-ethyl, and 2.32% and 1.93% of the dry mass of I. hederifolia and I. quamoclit, respectively, by using saflufencil. In addition, increasing 1 o C in spray temperature reduces 0.22% and 0.35% of the dry mass of I. hederifolia and I. quamoclit, respectively, by using carfentrazoneethyl, and 0.56% and 0.30% of those species, respectively, by using saflufenacil. The efficacy of carfentrazone-ethyl and saflufenacil to control I. hederifolia and I. quamoclit is dependent on both spray temperature and spray volume. The use of spray temperature next to 30 o C and spray volume next to 250 L ha -1 can provide a better control of those species.

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“…commonly infest agricultural areas in Brazil (Kuva et al 2008, Ferreira et al 2011, Giancotti et al 2014 where Ipomoea hederifolia and Ipomoea quamoclit have been two of the major weeds occurring in sugar cane, soybean, maize, and other crops. In addition to the direct interference on crops by competition for environmental resources, morning-glory weeds also indirectly interfere on the crop productivity by machinery blocking during mechanical harvesting (Carvalho et al 2009, Carvalho et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Dose-response of morning-glory species to PPO inhibitors

Agostineto¹,

Ansolin²,

Carvalho³

2015

Commun. Plant Sci.

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The objective of this research was to test the response of morning-glory species (Ipomoea hederifolia and Ipomoea quamoclit), two important weeds in Brazilian agricultural fields, growing after application of increased doses of carfentrazone-ethyl and saflufenacil. Pot dose-response tests were performed by spraying doses of carfentrazone-ethyl (0 up to 30 mL ai ha -1 ) and saflufenacil (0 up to 35 g ai ha -1 ) directly onto 6-8 leaved morning-glory plants. Dry mass accumulation was determined 14 days after spraying. At maximum field dose of carfentrazone-ethyl (30 mL ai ha -1 ), dry mass reduced by 59% for I. quamoclit and 75% for I. hederifolia; for saflufenacil (35 g ai ha -1 ), dry mass reduced by 83% for I. quamoclit and 71% for I. hederifolia. Both carfentrazone-ethyl and saflufenacil were very efficient to control I. hederifolia and I. quamoclit, since doses required to kill plants were very lower than recommended field doses (5.5% and 10% for carfentrazone-ethyl and saflufenacil, respectively, considering both species). Although I. hederifolia and I. quamoclit show a short different response to carfentrazone-ethyl and saflufenacil, both herbicides are efficient to control young plants in early post-emergence spraying.

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Chemical control of morning glory as a function of water restriction levels

Cited by 4 publications

References 14 publications

Controle químico de Talinum paniculatum em três estádios de desenvolvimento

Controle químico de Talinum paniculatum em três estádios de desenvolvimento

Spray temperature and spray volume influence on the efficacy of carfentrazone-ethyl and saflufenacil to control morning-glory

Dose-response of morning-glory species to PPO inhibitors

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