Fungicidal control of groundnut leafspots and rust by ultra‐low volume spray

Four systemic fungicides, a formulation of tridemorph + maneb (0.39 and 1.26 kg a.i./ha respectively), carbendazim (0.125 kg a.i./ha), benomyl (0.30 kg a.i./ha), tridemorph (0.45 kg a.i./ha) and a non‐systemic fungicide, mancozeb (2.00 kg a.i./ha) were evaluated for the control of groundnut leafspots caused by Mycosphaerella arachidis Deighton (Cercospora arachidicola Hori) and M. berkeleyii Jenkins (Cercosporidium personatum (Berk. & Curt.) Deighton) and rust, caused by Puccinia arachidis Speg., using ultra‐low volume application. Mancozeb application resulted in significantly higher pod and haulm (shoot) yields than the application of the systemic fungicides, except tridemorph + maneb. Mancozeb and tridemorph + maneb controlled both the leafspots and rust, consequently, their application resulted in higher yields than the other fungicides which controlled either the leafspots or the rust. The pod and haulm yields from the mancozeb treated plots were approximately 200 and 286%, respectively, of those obtained from the untreated plots in which none of the diseases were controlled.