Data/hora: 12/06/2024 08:56:01

Biblioteca(s): | Embrapa Soja.
Data corrente: | 06/05/2011
Data da última atualização: | 29/02/2012
Autoria: | PINTO, T. L. F.; CICERO, S. M.; FRANCA NETO, J. B.; FORTI, V. A.; DOURADO NETO, D.
Afiliação: | T. L. F. PINTO, ESALQ - USP; S. M. CICERO, ESALQ - USP; JOSE DE BARROS FRANCA NETO, CNPSO; V. A. FORTI, ESALQ - USP; D. DOURADO NETO, ESALQ - USP.
Título: | Strobilurin group fungicides and and asiatic rust disease on the production and quality of soybean seeds.
Ano de publicação: | 2011
Fonte/Imprenta: | Informativo ABRATES, Brasília, DF, v. 21, n. 1, p. 117, abr. 2011. N. Especial, ref. 92.
Idioma: | Inglês
Notas: | Edition of the Abstracts: 10th Conference of the International Society for Seed Science, Costa do Sauípe, Apr. 2011.

Conteúdo:

Unfavorable weather conditions, during the late soybean maturation, have caused problems in seed quality due to "forced maturation" or premature plant death, which can result in the appearance of green seeds. Strobilurin group fungicides
have physiological effects on plant performance, reftected in production, mainly by delaying the pIant senescence. This study aimed to evaIuate the effect of fungicides, especially the strobilurin group and rust disease on yieId and quality of
soybean seeds, with focus in the occurrence of green seeds. The treatments were controI and applications offtutriafole + thiophanate, methyl, pyraclostrobin + epoxiconazole and metconazole fungicides, and the products were applied in R2 and
R 5.1, growth stages, individually and also in combined applications. The experiments were carried out under field conditions
in Londrina-PR, during the 2007/08 and 2008/09 crops. It was used Coodetec 206 cultivar. The following evaluations were
performed in the field: rust disease severity by diagrammatic scale, production, seed weight and percentage of green seed, assessed visually. Seed quality was evaluated by means of the germination, tetrazolium, accelerated aging and electrical
conductivity tests. Analyses were performed immediately after harvest and after six months of storage. The experimental
design was randomized blocks with seven treatments and four blocks, for each crop. Means were compared by Tukey test at 5% probability. The fungicide, that controlled efficiently the rust disease, does not affect the production and has no direct
effects on seed quality and in the occurrence of green seed. Under favorable weather conditions for seed maturation, the
severity of soybean Asiatic rust disease interferes with the production, but does not influence on its physiological potential.
The soybean Asiatic rust disease associated with unfavorable weather conditions during the final stage of maturation
provides the occurrence of green soybean seeds that compromises the vigor after storage.

Thesagro: | Doença de planta; Ferrugem; Fungicida; Fungo; Qualidade; Semente; Soja.
Thesaurus Nal: | Fungi; Fungicides; Plant diseases and disorders; Rust diseases; Seed quality; Soybeans.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (32097-1) - UPC - PL - PP -  -  -  - DIS