Pustaka Ilmiah Universitas Padjadjaran

Proceeding Biotech

Antagonistic Potency Of Bacteria Isolated From Local Microorganism Of Maja In Againts On Damping Off Disease (Rhizoctonia Solani Kuhn.) And Growth Of Paddy

Damping off disease, caused by Rhizoctonia solani Kuhn, is one important diseases on field paddy. The use of antagonistic bacteria as bio-control agents is an alternative control method toward damping off disease which is friendly to environment.

The purpose of research was to examine the abilities of antagonistic bacterial isolate from maja fruit to suppress R. solani. The experiments were carried out in the Phytopathology Laboratory and Glasshouse of the Department of Plant Pests and Diseases, Faculty of Agriculture, Universitas Padjadjaran from Juny 2010 to September 2010.

There were two experiments i.e.: test of antagonistic ability of the isolates in dual culture method and test of ability of the bacterial isolate to increase growth of paddy var IR64 in the glasshouse. Those experiments were arranged in the completely randomized design consisted of 9 treatments and 3 replications for in vitro and growth test of paddy.

Eight of bacterial isolates from maja fruit showed antagonistic ability against R. solani in vitro. The highest suppression was shown by BM4, BM5 and BM6 isolate, with percentage inhibition 81,6% , 88,6% and 86,9%. All bacterial isolates have ability to increase the growth of paddy.