Abstract: A method for controlling a plant disease according to an embodiment includes treating a plant part, a seed, or a soil with a composition including at least one amino acid selected from the group consisting of glutamic acid, proline, tryptophan, and a combination thereof as an effective component. A method for promoting growth of an effective microorganism or controlling a plant disease uses prebiotics. As the amino acids have an effect of significantly promoting the growth of effective microorganism and having sustained maintenance of the effective microorganism at the same time and can reduce the incidence rate of plant disease, they can enhance the usefulness of eco-friendly microbial strains for disease control and be advantageously used as a substitute for chemical control agents.

Abstract: The present invention relates to an antibacterial or plant disease control composition containing caryolan-1-ol. According to the present invention, the caryolan-1-ol, as a volatile substance isolated from a Streptomyces sp. strain, has an excellent antifungal effect on various plant pathogens including Botrytis cinerea, Fusarium oxysporum, Phytophthora nicotinae, Colletotrichum gloeosporioides, Rhizoctonia cerealis, Rhizoctonia solani and Gibberella moniliformis and the like, and has storage disease preventive and herbicidal activity, thereby being usable as an antibacterial composition and a plant disease control composition.

Abstract: The present invention relates to an antibacterial or plant disease control composition containing caryolan-1-ol. According to the present invention, the caryolan-1-ol, as a volatile substance isolated from a Streptomyces sp. strain, has an excellent antibacterial effect on various plant pathogens including Botrytis cinerea, Fusarium oxysporum, Phytophthora nicotinae, Colletotrichum gloeosporioides, Rhizoctonia cerealis, Rhizoctonia solani and Gibberella moniliformis and the like, and has storage disease preventive and herbicidal activity, thereby being usable as an antibacterial composition and a plant disease control composition.

Abstract: Streptomyces badius SP6C4 strain has an antimicrobial activity against an insect pathogen or a strawberry fungal disease pathogen isolated from strawberry pollen. The growth of an insect pathogen and a strawberry fungal disease pathogen is suppressed by Streptomyces badius SP6C4 strain isolated from strawberry pollen. Streptomyces badius SP6C4 strain can be used as an environmentally friendly biological agrochemical which is free of any environmental contamination yielded as a side effect of an agrochemical or any human toxicity caused by residual agrochemicals, and, by having an excellent effect of controlling American foul brood, chalk brood, and strawberry flower mold disease, it can be very advantageously used in terms of an industrial use.

Abstract: Streptomyces badius SP6C4 strain has an antimicrobial activity against an insect pathogen or a strawberry fungal disease pathogen isolated from strawberry pollen. The growth of an insect pathogen and a strawberry fungal disease pathogen is suppressed by Streptomyces badius SP6C4 strain isolated from strawberry pollen. Streptomyces badius SP6C4 strain can be used as an environmentally friendly biological agrochemical which is free of any environmental contamination yielded as a side effect of an agrochemical or any human toxicity caused by residual agrochemicals, and, by having an excellent effect of controlling American foul brood, chalk brood, and strawberry flower mold disease, it can be very advantageously used in terms of an industrial use.