Efeito de alta temperatura no desenvolvimento de Hemileia vastatrix em cafeeiro suscetível Effect of temperature on coffee rust evolution

• Main Authors: Ivan José Antunes Ribeiro, Lourival Carmo Monaco, Otávio Tisseli Filho, Mauro Hideo Sugimori
• Format: Article
• Language: English
• Published: Instituto Agronômico de Campinas 1978-01-01
• Series: Bragantia
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051978000100002

Foi estudado o efeito de temperaturas elevadas no desenvolvimento da ferrugem do cafeeiro, verificando-se que a exposição de plantas a temperatura próxima de 40ºC por quatro horas durante quatro dias foi suficiente para impedir a evolução da moléstia. Períodos menores foram ineficientes para afetar o desenvolvimento do fungo.<br>The development of rust epidemics in tropical conditions of Brazil has been different than previously expected. Despite of high humidity the development is reduced to a minimum during the summer. High temperature was assumed to have a detrimental effect on the rust development. This paper reports the results of a study concerning the effect of high temperature on Hemileia vastatrix development. Temperature treatment of inoculated young plants at 40(0)C for 4 hours in 4 consecutive days was sufficient to prevent rust development. The curative effect was permanent indicating that the fungus was destroyed inside the plant tissue. Practical implications of such results are considered.