EFFECT OF SEED TREATMENT WITH RYZOBACTERIA TO THE GERMINATION PERCENTAGE AND THE INTENSITY OF THE DISEASE IN INFECTED RICE SEEDS BROWN SPOT DISEASE
Yulensri, Agustamar and Misfit Putrina
Department of food crops, Agricultural Polytechnic Payakumbuh
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ABSTRACT
Increased productivity of rice through proper cultivation techniques such as the application of SRI method is proven to increase rice production. If there is no yield losses due to pests and diseases that high productivity can be maintained so that food security will be realized. Control of potential techniques developed is to use microorganisms ryzobacteria indigenus P. fluorescent, B. thuringiensis, and S. marcescens which is better known as biocontrol agents for control of pests and also has the potential to control seed borne diseases. Ryzobacteria is a bacteria that lives in the soil and are semi anaerobic, allowing these bacteria to live and breed in rice paddies with SRI method of cultivation. Research germination test done Payakumbuh Politani biology laboratory from February to July 2015. Tests conducted on seed germination infected with the pathogen H. oryzae then treated with ryzobacteria. Once it is planted in the home screen and the observed intensity of the brown spot disease. Seed treatment with ryzobacteria on rice seeds infected with brown spot disease caused by the fungus H. oryzae can increase the percentage of germination when compared without giving ryzobacteria and significantly different according DNMRT test at 5% level, there is no interaction between giving ryzobacteria and infection ryzobacteria seed against the percentage of seed germination . Seed treatment with ryzobacteria on rice seeds infected with brown spot disease caused by the fungus H. oryzae can reduce the intensity of the brown spot disease when compared without giving ryzobacteria and significantly different according DNMRT test at 5% level, there is no interaction between giving ryzobacteria and infection ryzobacteria seed the intensity of brown spot disease.
Keywords : S. marcecens, P. fluorescent, B. thuringiensis. H. oryzae, SRI method of paddy.