Data/hora: 12/06/2024 02:51:09

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 07/02/1996
Data da última atualização: | 28/06/2013
Autoria: | TEEM, D. H.; HOVELAND, C. S.; BUCHANAN, G. A.
Título: | Sicklepod (Cassia obtusifolia) and Coffee senna (Cassia occidentalis): geographic distribution, germination and emergence.
Ano de publicação: | 1980
Fonte/Imprenta: | Weed Science, v.28, n.1, p.68-70, Jan. 1980.
Idioma: | Inglês
Conteúdo: | The distribution of sicklepod (Cassia obtusifolia L.) and coffee senna (Cassia occidentalis L.) in the United States is similar and both species are increasing as problems within their range. Sichlepod is a problem in 11 southernstates and increasing in 12 while coffee sen- na is a problem in 7 states and increasing in 8 states. Both species germinated over a wide range of temperature. Germination characteristics were similar in the range of 15 to 36 C. Germination of coffe senna was drastically reduced at 39 C by Rhizopus sp. Seedling growth was similar for both species and was maximum from 30 to 36 C. Both species have a hard seedcoat. Abrasion for 5, 10, or 15 s, puncturing with a needle, and sulfuric acid were all effective in initiating germination. Both species emerged from a soil depth of 12.5 cm; however, emergence of sicklepod was more rapid than coffee senna with 63% of the sicklepood seedling emerging from 2.5 cm after only 3 days.
Palavras-Chave: | Cassia obtusifolia; Coffee senna; Escarificacao; Geographic distribution; Hard seed; Scarificastion; Semente dura; Sichlepod.
Thesagro: | Cassia Occidentalis; Distribuição Geográfica; Germinação.
Thesaurus Nal: | germination; weed biology.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (30598-1) - ADD - SP - -- - SP1609 -  - 1609 - DIS