SILVER THIOSSULFATE IN CONTROL OF Colletotrichum gloeosporioide, CAUSAL AGENT OF BLISTER SPOT IN COFFEE TREE

Abstract

This study was conducted to evaluate the effects of silver thiosulfate (STS) in control of Colletotrichum gloeosporioides, causal agent of blister spot in coffee. Coffee seedlings were treated with STS in three concentrations (2.5, 5.0 and 10 mM) applied before or after inoculation with Colletotrichum gloeosporioides in coffee seedlings in three different cultivars: Catucaí Vermelho, Topázio and Mundo Novo. The study was conducted in a greenhouse at the Department of Plant Pathology, Federal University of Lavras. Severity was assessed in the four weeks after inoculation and it was calculated the area under the disease progress curve (AUDPC), obtained based on the indices of disease. There was an interaction between treatments and cultivars. The treatments with application seven days before the inoculation, at a concentration of 10 mM and application seven days following inoculation at a concentration of 2.5 mM was the best for the cultivate topázio.