Data/hora: 21/06/2024 05:28:47

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	28/07/1992	
Data da última atualização: 	28/07/1992	
Autoria: 	MERSIE, W and SINGH, M.	
Afiliação: 	University of Florida; Institute of Food and Agricultural Sciences.	
Título: 	Allelopathic Effect of Parthenium (Parthenium hysterophorus L.) Extract and Residue on Some Agronomic Crops and Weeds.	
Ano de publicação: 	1987	
Fonte/Imprenta: 	Journal of Chemical Ecology, v.13, n.7, 1987.	
Idioma: 	Inglês	
Conteúdo: 	Allelopathic effects of entire shoot extract, plant part extracts, and shoot residue of parthenium (Parthenium hysterophorus L.) on com (Zea mays L.), ryegrass (Lolium multiflorun Lam.), wheat (Triticum aestivum L.), velvetleaf (Abutilon theophrasti Medik.), and soybean [Glycine max (L) Merr.] growth were examined. Parthenium shoot contained water-soluble materials that were toxic to root growth of velvetleaf and wheat. At 4% (w/v) concentration, root growth of velvetleaf and wheat were reduced by 60 and 75%, respectively. The order of increasing sensitivity to parthenium was ryegrass, corn, wheat, and velvetleaf. There was a strong correlation between extract concentration and increased toxicity to test species. The toxicity of plant part extracts was also concentration dependent. At 1 and 2% (w/v), the inflorescence and leaves caused more root inhibition than stem extract. Parthenium shoot incorporated in soil at 1% (w/w) caused significantly more root inhibition of wheat than soybean, corn, and ryegrass. At 4% (w/w), root growth of all the test species was inhibited compared to the control. Toxicity of parthenium residue to wheat diminished with increasing periods of decomposition. Residue decomposed for four weeks was less toxic than the undecomposed residue.	
Palavras-Chave: 	inhibition; ryegrass; soybean; velvetleaf.	
Thesagro: 	Compositae; Glycine Max; Lolium Multiflorum; Triticum Aestivum; Zea Mays.	
Thesaurus Nal: 	Abutilon theophrasti; allelopathy; corn; Parthenium; Parthenium hysterophorus; wheat.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (15254-1) - ADC - SP - -- - 5425 -  - 5425 - DIS
CNPMF - (15651-1) - ADC - SP - -- - 5425 -  - 5425 - DIS