Consulta: creatorFacets:"RONCHI,C.P."
Registros recuperados: 3
Data/hora: 05/06/2024 04:23:38

2,4-D Hormesis Effect on Soybean
Provedor de dados: 87
Autores: SILVA,J.R.O.; MARQUES,J.N.R.; GODOY,C.V.C.; BATISTA,L.B.; SILVA,A.A.; RONCHI,C.P.
ABSTRACT: The hormesis effect of 2,4-D, applied at two stages of soybean development, on the physiological components of crop yield, was investigated. Soybean seeds of the cultivar ‘AG 3680 IPRO’ were sown in pots containing 7 L of a substrate and kept in a greenhouse. A randomized complete block design with four replicates was used. Eighteen treatments were tested, arranged in a split-plot scheme. The plots consisted of two stages of herbicide application (V4 and V6), and the split-plots were arranged by nine 2,4-D doses (0, 5, 10, 15, 20, 25, 30, 40, and 50 g ha-1). At the time of harvest, 100 days after sowing, significant interactions between crop development stages and 2,4-D doses were observed for the number of nodes in the main stem (NNMS) and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Auxin; Herbicide.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100154

INTERAÇÃO ENTRE TAMANHOS DE VASO E DOSES DE GLYPHOSATE NO CONTROLE DE BRAQUIÁRIA
Provedor de dados: 87
Autores: CAMPOS,A.A.V.; RONCHI,C.P.
RESUMO Objetivou-se com este trabalho avaliar a interação entre o tamanho do vaso de cultivo e doses de glyphosate no crescimento, na fisiologia e na eficácia de controle de Brachiaria decumbens. A semeadura foi feita em vasos contendo 2, 5, 10 e 20 L de substrato, mantidos em casa de vegetação. Entre os 41 e 63 dias após a emergência (DAE), avaliou-se o crescimento deB. decumbens. Aos 64 DAE, fez-se a aplicação do glyphosate nas doses de 0,0, 0,8, 1,6 e 3,2 kg ha-1 de equivalente ácido. Foram avaliadas as trocas gasosas e a fluorescência da clorofila a, aos dois dias após a aplicação (DAA), bem como a eficácia de controle, aos 7, 14, 21 e 28 DAA, sendo nesta última avaliação determinada ainda a matéria seca da parte aérea. Por fim, aferiu-se ainda a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria decumbens; Fotossíntese; Herbicida; Plantas daninhas; Restrição radicular.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400727

Response of Arabica Coffee Cultivars to Competition from Beggarticks
Provedor de dados: 87
Autores: BORGES,L.G.M.; MIRANDA,F.R.; BORGES,A.M.; SILVA,J.R.O.; CAMPOS,A.A.V.; RONCHI,C.P.
ABSTRACT: The goal of this study was to analyze the response of Arabica coffee cultivars grown under three levels of Bidens pilosa (beggarticks) interference. At 30 days after transplanting (DAT) of 14 Arabica coffee cultivars into 11 L pots, beggarticks was seeded in the pots and soon after emergence, three levels of weed infestation were established: none, low (two plants per pot), and high (five plants per pot). Treatments were arranged in a 14 × 3 factorial scheme under a completely randomized design, with four replicates. Coffee plant growth was evaluated at both weed emergence and blossoming (90 DAT) when the experiment was completed. Regardless beggarticks infestation levels, significant effects of cultivars occurred on almost all the coffee growth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bidens pilosa; Coffea arabica; Weed competition; Cultural control; Growth; Integrated weed management.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100159