Evaluasi Ketahanan Terhadap Penyakit Karat Daun dan Produksi Beberapa Varietas Kedelai

Abstract

This study aimed to evaluate the resistance of soybean varieties to rust disease and its production. The study was conducted for 3 months, from May - July 2017, in the 11th Districts, Manokwari regency.The study was conducted using Randomized Block Design with three replications. The treatment consisted of 5 varieties of soybeans, namely varieties Burangrang, Grobogan, Dena-1, Anjasmoro, and Detam-1. There was no pathogen inoculation treatment in the field. Parameters observed included number of branches, number of leaves, plant height, number of seeds per pod, weight per 100 seeds, and seed weight per plot, and leaf rust intensity. Data analysis was performed using analysis of variants (ANOVA), if a significant differences were found among the treatments, it was followed by BNJ test at level of 95%. Varieties tested had different responses to leaf number parameters, plant height and number of branches. The number of leaves, plant height and number of branches increased until the third observation, in the fourth observation there was a decrease and there was an increase. The intensity of rust disease in Burangrang varieties of 43.33% were categorized as susceptible varieties, while the disease intensity of Grobogan varieties was 36.09%, Dena-1 35.77%, Anjasmoro 39.42%, and Detam-1 28.25% were categorized moderate resistant varieties. The weight of seeds per plot of Dena-1 varieties was 1,427.77 kg/ha higher than that of Burangrang 861,10 kg/ha, Detam-1 805,55 kg/ha, Grobogan 738,88 kg/ha and Anjasmoro 655,55 kg/ha. The low production of seeds in the varieties studied was due to (a). the presence of leaf rust disease, and sclerotium wilt disease, and (b) the presence of pest caterpillar attack.