Integrated Aplication of Plant Growth-Promoting Bacteria, Straw Mulch and Soybean Resistant Cultivars to Control The Sclerotium Blight Disease (Sclerotium rolfsii) of Soybean

Abstract

One of the factors affected the increasing of soybean production in Indonesia is a disease caused by fungal pathogen, i.e. sclerotium blight disease caused by Sclerotium rolfsii. Integrated control was not applied yet intensively by the farmers. Straw mulch were used to control bean fly (Ophiomyia phaseoli) but not for sclerotium blight disease. Some growth-promoting bacteria have been applied to enhance the growth of soybean plants but it still limited in the green house. There are few reports related with integrated control of basal stem rot of soybean especially application in the field. This experiment was conducted to evaluate the application of varieties, straw- mulch, and plant growth-promoting bacteria in integrated way to control the incidence of basal stem rot caused by S. rolfsii in soybean. Two soybean cultivars and two isolates of POPB were used in this experiment. Research result showed there were no significantly different effects of the interaction of varieties, straw mulch, and POPB. Significant single effects toward disease incidence and AUDPC values were only shown by the application POPB and straw mulch. The value of Area Under Disease Progress Curve (AUDPC) on plots covered with straw mulch (829.9 units) were significantly higher compared with those on plots without straw mulch (458.9 units). Plants in plots treated with POPB have AUDPC values 464.3 units which significantly lower compared with the plots without application of POPB (824.7 units). Disease incidence and the AUDPC value on Anjasmoro and Oepak Kuning varieties were not significantly different