Uji Beberapa Konsentrasi Ekstrak Tepung Daun Sirih Hutan (Piper Aduncum L.) U…

The research aims to observe and to find the best concentration of wild betel leaf powder extract to control cocoa pod disease caused by Phytophthora palmivora Butl. The research had been conducted from October to December 2015 at the Laboratory of Plant Pathology, Faculty of Agriculture, University of Riau. The research was conducted experimentally using a completely randomized design consisti…