Application of pantoea agglomerans RMM02 and its products in prevention and treatment of rice false smut

By using biocontrol agents prepared from clustered pan-mycelium RMM02 and spraying them on rice paddies, the problems of high cost and environmental pollution associated with chemical pesticides in controlling rice false smut have been solved. This has enabled effective control of rice false smut over a longer period, reducing the difficulty of prevention and control.

CN120442475BActive Publication Date: 2026-05-12ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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Patent Information

Application Number
CN202510600332.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-05-12
Publication Date
2026-05-12
Estimated Expiration
2045-05-12

AI Technical Summary

Technical Problem

Existing technologies rely on chemical pesticides to control rice false smut, which are costly, pose environmental pollution risks, and have a short control window, making it difficult to effectively control the widespread and severe outbreaks of rice false smut.

Method used

Biocontrol agents were prepared using Pantotheca acuminata RMM02 and its fermentation broth. These agents were sprayed onto rice paddies and combined with protectants such as carboxymethyl cellulose, starch, and chitosan to ensure that the viable bacterial count was between 1×10⁵ CFU/mL and 1×10¹⁰ CFU/mL. Spraying was carried out from 15 days before rice heading to 5 days after heading. Reapplication was recommended after rain to extend the control period.

Benefits of technology

It significantly inhibits the growth of rice false smut, effectively controls rice false smut, reduces production costs, reduces environmental pollution, and extends the control period to 15 days before rice heading to 5 days after heading, thus improving control effectiveness and efficiency.

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Abstract

The application discloses application of Pantoea agglomerans RMM02 and a product thereof in prevention and treatment of rice smut. Pantoea agglomerans The classification name of the Pantoea agglomerans RMM02 is , the preservation number is GDMCC No. 65516, the preservation unit is Guangdong Microbial Culture Collection Center, and the preservation time is November 29, 2024. The Pantoea agglomerans RMM02 is separated from a soil of a rice smut occurrence plot, and is screened through indoor confrontation test and has significant inhibitory activity on Ustilaginoidea virens. Through indoor bacteriostatic test, it is shown that the active bacteria have significant inhibitory activity on Ustilaginoidea virens. Through indoor and field tests, it is shown that the bacteria have significant inhibitory effect on growth of Ustilaginoidea virens, and can control development of a disease during a field smut occurrence period. A biocontrol fungicide prepared after fermentation of the bacteria can effectively prevent and treat smut hazards, and guarantees high yield and high quality of rice.
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