NOVELTY - Biofertilizer is prepared by using organic leaf extract that contains pyroligneous compound and silicon compound. The liquid extract is obtained by condensing smoke and adding silicon compound, where compound is natural compound obtained by extracting and purifying fossilized algae with heating it. The biofertilizer is comprised of micronized silicon oxide and biotechnological extract. The biotechnological extract is comprised of pyroligneous extract (750 ml), micronutrients (40 mg), yeast extract (25 mg), silicon powder (125 g), macronutrients (70 mg; primary and secondary) and ash (250 mg).    USE - Biofertilizer used as a repellent (claimed) and for treating anthracnose, rot, citrus canker, bacterial wilt, pustules and other phytopathogenic diseases.    ADVANTAGE - The biofertilizer is stable, economic and eco-friendly, and has high organic matter and micronutrients in the liquid form without toxic material.    DETAILED DESCRIPTION - Biofertilizer is prepared by using organic leaf extract that contains pyroligneous compound and silicon compound. The liquid extract is obtained by condensing smoke and adding silicon compound, where compound is natural compound obtained by extracting and purifying fossilized algae with heating it. The biofertilizer is comprised of micronized silicon oxide and biotechnological extract. The biotechnological extract is comprised of pyroligneous extract (750 ml), micronutrients (40 mg), yeast extract (25 mg), silicon powder (125 g), macronutrients (70 mg; primary and secondary), ash (250 mg), sugar cane molasses (250 ml), nicotinamide (15 mg), Kool 1003, Pseudomonas aeruginosa (104 colony forming unit per ml (CFU/ml)), Azotobacter azotoformans (1O4 CFU/ml), Nocardia sp. (103 CFU/ml), Mycobacterium smegmatis (101 CFU/ml), Ralstonia eutropha (102 CFU/ml), Bacillus thuringiensis (104 CFU/ml), Streptomyces ssp. (103 CFU/ml), Alcanivorax borkumensis (104 CFU/ml), Rhodospirillum rubrum (103 CFU/ml), Lachnospira multipara (103 CFU/ml), Beijerinckia fluminensis (10 CFU/ml) and distilled water, where distilled water is used to make extract volume 2 L. The cane molasses is comprised of 104-105 CFU/ml of micro-fungi, bacteria and yeast. Micronutrients are boron, manganese, copper, iron, zinc, cobalt, nickel, aluminum, sodium, molybdenum, etc. The Kool 1003 is composed of organic nitrogen, starch, sulfur dioxides, peroxides and carbohydrates. The biofertilizer is prepared by weighing and dissolving ingredients in molasses. The solution is mixed to dissolve lumps. The bacterial suspensions are added to the solution. The volume (2 L) of solution is increased by using distilled water. All ingredients are mixed well at room temperature, where mixture is protected from the light.