Abstract
Black pepper (Piper nigrum L.) is an important agricultural crop in Indonesia. However, black pepper production in Indonesia is limited by plant pathogen infection, especially Phytophthora capsici, which causes Foot Rot in pepper plants. This pathogen contributes to a high decline in black pepper productivity. This study aims to determine the proper media composition for P. capsici growth based on the mycelial growth, viability, sporulation, and virulence of P. capsici on pepper leaves. The media used in this study were potato dextrose agar (PDA), martin agar (MA), carrot agar (CA), water agar (WA), corn meal agar (CMA), soil extract agar (SEA), and vegetable 8 (V8). The results showed that CMA media was the most optimal medium for P. capsici growth, as indicated by the size of the mycelium with a diameter of 8.00 cm on the fifth day after inoculation. The viability of mycelium of P. capsici was best found on PDA, CMA, and V8 media. Meanwhile, the optimum sporulation and virulence of P. capsici occurred on SEA media, characterized by zoospore production of 5.42x106/ml and symptom areas on leaves of 18.61 cm2 and 16.69 cm2.
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