Data/hora: 24/06/2024 06:10:36

Biblioteca(s): | Embrapa Soja.
Data corrente: | 06/04/2004
Data da última atualização: | 29/10/2013
Autoria: | VOLL, E.; BRIGHENTI, A. M.; GAZZIERO, D. L. P.; ADEGAS, F. S.
Título: | Population dynamics and competition of Cardiospermum halicacabum with soybeans in two management systems.
Ano de publicação: | 2004
Fonte/Imprenta: | In: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004.
Páginas: | p. 143-144.
Série: | (Embrapa Soja. Documentos, 228).
Idioma: | Inglês
Notas: | Editado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi.
Conteúdo: | Balloonvine (Cardiospermum halicacabum) is of recent introduction in Parana State, and is an economically important weed in summer crop in Southern region of Brazil. In order to determine the time and rate of emergence, survival and competition of balloonvine with soybeans (cv. Embrapa 62), grown under two management systems, one experiment was carried out at Londrina, PR during three seasons (1997/98 to 1999/00). Five population densities of ballonvine (zero, 60, 120, 240 and 480 seeds/m2) were established by sowing seeds in till and no-till managements for soybeans. A split-plot in a randomized complete block design, with four replications, was used. An annual seedbank decrease rate of 61.6% and 56.4% was observed for till and no-till, respectively, related to survival time estimates of six and seven years. Annual rates of emergence, in the absence of re-infestations, were higher in no-till (42.6%, 32.0% and 5.0%) than in till (29.9%, 10.9% and 0.7%), in those three seasons. Average losses of soybeans were estimated in about 8.1% in the presence of 10 plants/m2 of balloonvine over 3,549 kg/ha of soybeans. Balloonvine presents significant infestation and competition hability in the soybean crop. The weed, as a plant, is eliminated by downy mildio (Peronospora farinosa) attach.
Thesagro: | Soja.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (23715-1) - UMT - PL - -- - RF 633.34072 - W927a -  - DIS