Germplasm screening of castor bean (Ricinus communis L) for resistance to fusarium wilt (Fusarium oxysporum f. ricini).

Castor bean is a plant whose seeds produce oil that can be utilized in coatings, inks, lubricants, and a variety of other items. castor bean can be grown in tropical and subtropical climates. Castor oil is the only vegetable oil that can be used to make biodiesel since it is soluble in alcohol, has a high viscosity, and can be produced with less heat than other types of oil. Pests or diseases can create biotic stress. Fusarium oxysporum f. ricini, often known as wilt disease, attacks vascular tissue through the soil and can cause a reduction in castor production. With the aid of disease screening, the genotypes of castor beans that are resistance to fusarium wilt were chosen in this study. The research was conducted in an experimental field Agriculture Faculty at Brawijaya University from September 2020 to May 2021. This experiment uses 96 genotypes of castor bean, local and introduced. Observation and screening throughout three replications each genotype had three plants in one plot, for a total of nine plants throughout all replications. Fusarium wilt screening using the root deep approach was used to assess castor bean genotype. Fusarium wilt is observed by disease incidence (percent), with the percentage occurring between 20 and 75 days after planting. The result is 96 genotypes, with 8 genotypes showed highly resistance, 7 genotypes with resistance categories, 14 genotypes with moderately susceptible categories, and the fusarium disease infected 13 genotypes. There are 24 genotypes in the susceptible category and 30 genotypes in the highly susceptible category. According to the research results, disease infection induced by Fusarium oxysporum has a diversity of resistance in each genotype. [ABSTRACT FROM AUTHOR]