Disease Resistance in Coffee Berries -Loss and Recovery after Heating

Abstract

Pre-treatment with heat has long been known to decrease the resistance of plants to disease Salmon (l905a and b) successfully infected various species of Gramineae with normally incompatible physiologic races of Erysiphe, by heat pre-treatments of detached leaves. Later investigators have obtained similar results (Kassanis 1952, Yarwood 1956 and 1963), while others have correlated heat-induced susceptibility with reduced phytoalexin output (Mulller 1956, Jerome and MulIer 1958, Uehara 1960, Chamberlain and Gerdemann 1966).