Data/hora: 02/06/2024 13:31:37

Provedor de dados: 	65	
País: 	Brazil	
Título: 	The influence of low temperatures on the incidence of sugary disease on sorghum	
Autores: 	Bogo,Amauri; Casa,Ricardo Trezi; Sangoi,Luis; Borba,Paulo Tarcísio Domatos.	
Data: 	2006-04-01	
Ano: 	2006	
Palavras-chave: 	Sorghum bicolor; Claviceps africana; Ergot; Hybrid; Male-sterility; Environment.	
Resumo: 	The relationship between pre-flowering climatic conditions and sugary disease incidence was quantified in grain and forage sorghum genotypes at two sowing periods (mid November and mid December). The trials were carried out over the 2001/02 and 2002/03 growing seasons, in Lages, Santa Catarina State. Four commercial male-fertile sorghum hybrids (BR 600-forrage, BR 700-grain, BR 701-forage/silage and BR 800-forage) and one male-sterile inbred line (BR 001-A) were evaluated. When each genotype reached the flowering stage, 50 panicles were marked and sprayed with a suspension of Claviceps africana (1,000 spores mL-1). Air temperature, humidity and rainfall were recorded through out the growing cycle. Low temperatures three to four weeks prior to flowering, increased susceptibility. At both sowing periods, average night temperatures lower than 15°C during the critical period of pre-flowering turned the fertile hybrids as susceptible as the male-sterile inbred to ergot infection. The tested hybrids differed in their ability to tolerate pre-flowering cold stress. Seed set in uninoculated heads under pollination bags was also reduced, suggesting that increased susceptibility to sugary disease was the result of low temperature induced sterility.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000200007	
Editor: 	Universidade Federal de Santa Maria	
Relação: 	10.1590/S0103-84782006000200007	
Formato: 	text/html	
Fonte: 	Ciência Rural  v.36 n.2 2006	
Fonte: 	info:eu-repo/semantics/openAccess