Data/hora: 24/06/2024 19:07:41

Biblioteca(s): 	Embrapa Roraima.	
Data corrente: 	29/11/2004	
Data da última atualização: 	29/11/2004	
Autoria: 	NECHET, K. de L.; BARRETO, R. W.; MIZUBUTI, E. S. G.	
Título: 	Sphaceloma poinsettiae as a potential biological control agent for wild poinsettia (Euphorbia heterophylla).	
Ano de publicação: 	2004	
Fonte/Imprenta: 	Biological Control, v. 30, , p. 556-565, 2004.	
Idioma: 	Inglês	
Conteúdo: 	Sphaceloma poinsettiae, a scab-causing fungus that attacks wild poinsettia (Euphorboia heterophylla) was evaluated as a mycoherbicide. Plants representing nine different E. heterophylla accessions were tested and variable resistance levels to 10 different isolates of S. poinsettie were selected based on its high aggressiveness; it caused scab that led to stem-girdling in the majority of plants belonging to most wild poinsettia accessions. Plants inoculated with conidial suspension developed low disease severity; suspensions of myclial fragments caused higher disease severity. Viability of mycelium declined rapidly either in storange under room temperature or at 4ºC. After 25 days, 60% of mycelial fragments kelpt in distilled watre 4ºC or in 35% sterile sucrose solution germinated. Cultures of S. poinsettiae were capable of growing at temperature at temperatures ranging from 10 to 30 whereas the mycelial fragments germinated at 20-30ºC...	
Palavras-Chave: 	Planta daninha.	
Thesagro: 	Controle Biológico; Herbicida; Soja.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Roraima (CPAF-RR)	
Exemplares: 	CPAF-RR - (5754-1) - ADD - SP - -- -  -  - 2004.02375 - DIS