Data/hora: 28/05/2024 14:53:18

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