Abstract
Abstract Soybean (Glycine max L.) is one of the agricultural commodities needed in high quantities in Indonesia. Using agroforestry systems for soybean cultivation can solve the domestic fulfillment of soybean needs. The moist environmental conditions of agroforestry plantings due to shading make soybeans susceptible to leaf rust disease. The pathogen Phakopsora pachyrhizi causes leaves to fall off early, inhibiting soybean seed pod growth. Research on the incidence of leaf rust disease in several soybean varieties is essential to optimize soybean production in agroforestry systems. The study was conducted from June to October 2023 in the Special Purpose Forest Area (KHDTK) of Alas Bromo, Karanganyar, Central Java, Indonesia. The experiment used a randomized experimental design (RAK) with seven soybean varieties: Anjasmoro, Agromulyo, Dena-1, Dena-2, Denasa-1, Denasa-2, and Devon-1. Disease incidence observation was based on visual symptoms. The disease incidence was in the range of 3.33-26.67%. The highest incidence occurred in the Denasa-1 and Dena-2 varieties, while the lowest was in the Anjasmoro and Dena-1 variety.
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