Pengaruh Pemberian Biochar Tongkol Jagung dan Pupuk Organik Cair (Jakaba) terhadap Penyakit Hawar Daun (Exserohilum turcicum) pada Jagung (Zea mays) Varietas NK 6501

Abstract

Corn (Zea mays) is a cereal plant that is included in food ingredients because it is the second source of carbohydrates after rice. The various benefits of corn make this plant very popular with the community, especially in North Sumatra, so that corn production continues to increase. One way to increase corn production is by extensification or expansion of agricultural land. One of the obstacles in increasing corn production is the disturbance of plant pests. One of them is Leaf blight disease caused by (Exserohilum turcicum). This disease is the main disease and is important to control in addition to downy mildew. This study aims to determine the effect of corn cob biochar and Liquid Organic Fertilizer (Jakaba) on corn leaf blight disease (Exserohilum turcicum). This study was conducted at the Sygenta Learning Center, Tiga Binanga District, Karo Regency, North Sumatra. Using a Randomized Block Design with 2 treatment factors. The first factor, namely the dose of corn cob biochar with 3 levels, namely B0 = 0 kg / ha, B1 = 750 kg / ha, B2 = 1500 kg / ha. The second factor, the dose of Jakaba with 3 levels, namely P0 = 0 L / ha, P1 = 1.5 L / ha, P2 = 3 L / ha. The results of the study obtained the macroscopic characteristics of the E. turcicum fungus showed dark green mycelium overall, the surface texture and the shape of the colony edges were fibrous and had a concentric distribution pattern. The lowest disease incidence was found in the treatment of biochar 0kg/ha and jakaba 3l/ha (B0P2) with a biochar dose of 0kg/ha and a jakaba dose of 3L/ha and the highest disease incidence was in the control treatment (B0P0). The highest disease severity was in the treatment of biochar 750kg/ha and jakaba 3l/ha (B2P1) with a biochar dose of 1500kg/ha and a jakaba dose of 1.5 L/Ha. while the control treatment (B0P0) showed the highest disease severity.