Weather factor and chemical management against late leaf spot (LLB) and rust diseases under rainfed groundnut conditions

Abstract

Groundnut (Arachis hypogaea L.) is most growing under rainfed conditions, the important disease of late leaf spot and rust reduction of yield in rainfed condition. Experiments were conducted 2012, 2013 and 2014. The temperature for three years minimum temperature 23.57 °C temperature 37.54 °C combination of weather conditions during the growing season of groundnut foliar diseases of Late leaf spot and Rust diseases for favourable severe conditions. Among the different chemicals tested for three years the combination of Carbendazim + Mancozeb (SAAF)@1.25Kg/ha recorded the least diseases incidence of Late leaf spot (22.36%) and rust (17.58%) with accounting of diseases reduction for late leaf spot (61.24%) and rust (70.03%) followed by carbendazim and chlorothlonil. The individual application copper hydroxide controlled the rust disease effectively when compared to other treatments also increased yield 1003.67kg/ha. The Carbendazim + Mancozeb (SAAF) @ 1.25kg/ha broad spectrum fungicide for reduced the spraying schedule and no of chemicals used and also protective and curative action with contact and systemic in nature groundnut cultivations under rain fed condition.